{"id":551,"date":"2015-11-24T09:46:13","date_gmt":"2015-11-24T01:46:13","guid":{"rendered":"http:\/\/www.ukm.my\/jkukm\/?page_id=551"},"modified":"2018-02-22T17:41:44","modified_gmt":"2018-02-22T09:41:44","slug":"volume-20-2008","status":"publish","type":"page","link":"https:\/\/www.ukm.my\/jkukm\/volume-20-2008\/","title":{"rendered":"Volume 20 (2008)"},"content":{"rendered":"

Table of Contents<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
No.<\/strong><\/td>\nArticle<\/strong><\/td>\n\n

Detail<\/strong><\/p>\n<\/td>\n<\/tr>\n

1.<\/td>\nA Case Study on The Implementation of Quality Control Circle In The Production Line of A Manufacturing Company
\nNorhamizah Satar & Baba Md Deros<\/sup><\/span><\/span>Abstract<\/span>
This paper is based on a case study of Quality Control Circle (QCC) implementation in the production line\u00a0of a manufacturing com pan ,: n Malaysia. In this paper, the authors would like to share their experience\u00a0of a success story in implementing the QCC, which is known as Small Group Activity (SGA) in their\u00a0production line.The SGA was implemented with total involvement of its employees and fully supported\u00a0by committed top management. As an example, the authors discuss their experiences in detail the SGA\u00a0activities implemented in the production-engineering department. The case study presented showed\u00a0and proved that by empowering the lower level employees through implementing QCC activity, the\u00a0company had gained a substantial human development and cost savings. Finally, the authors also like\u00a0to share the problems that they had encountered during the implementation of the SGA activities and\u00a0how they had remedied these difficulties.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-01<\/a><\/span><\/td>\n
\n

\"download<\/a>Page 1-10<\/span><\/p>\n<\/td>\n<\/tr>\n

2.<\/td>\nCharacterization of Metal Injection Molding (MIM) Feedstock Based on Water Soluble Binder System
\nMuhamad Hussain Ismail, Norhamidi Muhamad & Mohd Afian Omar<\/sup><\/span><\/span>Abstract<\/span>
Metal Injection Molding (MI M) is a new manufacturing technique especially to produce small and\u00a0complex precision parts. Charaterization of feedstock is one of the important tasks in order to evaluate\u00a0the homogeneity level of the feedstock prepared and to control the quality of the parts during injection\u00a0molding process. This paper attempts to investigate the characteristics of the MIM feedstock by performing\u00a0rheological test using the feedstock consisted of 316 L stainless steel powder with a mean particle size\u00a0of 12 um and a major fraction of water soluble binder system known as polyethylene glycol (PEG). Three\u00a0different weight percentage of PEG at 65, 75 and 85 respectively were used during the investigation. The\u00a0viscosity of MIM feedstock at different temperatures and shear rates were measured and evaluated. Results\u00a0show that increasing the PEG content would decrease the viscosity of the feedstock. The rheological\u00a0properties of the feedstock showed that the proposed method of mixing is adequate to produce a\u00a0homogeneous feedstock that is favorable for injection molding process.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-02<\/a><\/span><\/td>\n
\"download<\/a>Page 11-18<\/span><\/td>\n<\/tr>\n
3.<\/td>\nValidating A Conceptual Framework For Benchmarking Implementation in SMEs At Six Case Studies
\nBaba Md Deros, Sha’ri Mohd Yusof & Azhari Md Salleh<\/sup><\/span><\/span>Abstract<\/span>
This paper presents the case study results of a conceptual framework for benchmarking implementation in\u00a0Small and Medium Enterprises (SMEs), which had taken into consideration of SMEs strengths, weaknesses\u00a0and characteristics. This framework provides a guide on the approach “how to” implement benchmarking,\u00a0which is simple in structure, systematic and easily understood.The conceptual framework described in\u00a0this paper was based on gradual implementation and selection of the appropriate key performance\u00a0measures and benchmarking techniques as and when necessary, with the ultimate aim of improving\u00a0business competitiveness and performance. Finally, the paper culminates with discussions, suggestions\u00a0and comments by six case study companies with respect to the conceptual framework applicability and\u00a0usability in the SMEs environment.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-03<\/a><\/span><\/td>\n
\"download<\/a>Page 19-31<\/span><\/td>\n<\/tr>\n
4.<\/td>\nUse of Strain-Life Models With Wavelet Bump Extraction (WBE) for Predicting Fatigue Damage
\nShahrum Abdullah, Choi Jae-Chil & John R. Yates<\/sup><\/span><\/span>Abstract<\/span>
This paper presents the use of strain-life fatigue damage models to observe the cycle sequence effects\u00a0in the wavelet-based fatigue data editing algorithm. This algorithm is called Wavelet Bump Extraction\u00a0(WBE), which was developed to produce a shortened signal by extracting fatigue damaging events from\u00a0the original signal with the retention of the original cycle sequences. Current industrial practice uses the\u00a0Palmgren-Miner linear damage rule to predict the fatigue life or fatigue damage under variable amplitude\u00a0(VA) loadings. Using VA loadings , however, this rule does not have load interaction accountability in the\u00a0analysis.Thus,a more suitable approach has been identified for predicting fatigue damage of VA loadings,\u00a0i.e. the Effective Strain Damage (ESD) model. In this study, the cycle sequence effect observation was\u00a0implemented in both analytical and experimental works using the WBE extracted VA loadings. The study\u00a0includes the comparison between the experimental and the analytical (using four strain-life fatigue\u00a0damage models: Coffin-Manson , Morrow, Smith-Watson-Topper and ESD) fatigue damage. The smallest\u00a0average in the fatigue damage difference was found when using the ESD strain-life model, suggesting\u00a0the suitability of the this model for analysing VA fatigue loadings.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-04<\/a><\/span><\/td>\n
\"download<\/a>Page 33-44<\/span><\/td>\n<\/tr>\n
5.<\/td>\nDual Boundary Element Method In Modelling of Fatigue Crack Propagation
\nAhmad Kamal Ariffin Mohd Ihsan, Nik Abdullah Nik Mohamed & Fadhlur Rahman Mohd Romlay<\/sup><\/span><\/span>Abstract<\/span>
This paper deals with the mod ling of fatigue crack propagation on a centre member bar using a dual\u00a0boundary element method. The effects of life cycle to the multiple site fatigue crack propagation were\u00a0studied. Analysis of stress intensity factor was performed by the deterministic approach using a dual\u00a0boundary element method. The dual boundary element method was used to simplify the crack model\u00a0through the numerical approach .The complex problems have been solved using the information from a\u00a0boundary condition only. Next, the initial crack and life cycle of the structure have been predicted using\u00a0probabilistic method which is Monte Carlo.The crack size and fatigue life were computed until failure of\u00a0the structure. The failure analysis was performed by a linear elastic fracture mechanics. The scenarios of\u00a0the fatigue crack propagation were given by an integration of both dual boundary element and Monte\u00a0Carlo method. Therefore, fatigue life of multiple site crack structure can be predicted.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-05<\/a><\/span><\/td>\n
\"download<\/a>Page 45-55<\/span><\/td>\n<\/tr>\n
6.<\/td>\nFinite Element Based Life Prediction of A New Free Piston Linear Generator Engine Mounting
\nMd. Mustafizur Rahman, Ahmad Kamal Ariffin, Nordin Jamaludin & Che Hasan Che Haron<\/sup><\/span><\/span>Abstract<\/span>
This paper presents the finite element based fatigue life prediction of a new free piston linear generator\u00a0engine mounting. The objective of this paper is to assess the critical fatigue locations on the component\u00a0due to loading conditions and also assess the damage tolerance design. This paper shows the effect of\u00a0mean stress and the probabilistic nature of fatigue on the fatigue life. The finite element modeling and\u00a0analysis have been performed using computer-aided design and finite element analysis software packages\u00a0and the fatigue life prediction was carried out using commercial fatigue codes. Stress-life approach and\u00a0strain-life approach are applied to predict the fatigue life of the free piston linear engine mounting. The\u00a0result is a life contour, showing how long each area of a mounting will survive under defined loading\u00a0conditions. The results are expected to show contour plots of fatigue life, and damage histogram at the\u00a0worst or most damaging case. This paper shows the comparison between the stress-life approach and\u00a0strain-life approach. From the results, it can be concluded that Morrow mean stress correction method\u00a0has been found to give the most conservative results for strain-life method. SAE 1 045-450-QT and SAE\u00a01 045-595-QT materials are considered in this study. It can be also seen that SAE 1 045-595-QT material gave\u00a0consistently higher life than SAE 1 045-450-QT material for all loading conditions for both methods.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-06<\/a><\/span><\/td>\n
\"download<\/a>Page 57-73<\/span><\/td>\n<\/tr>\n
7.<\/td>\nEvaluation of Stress Intensity Factor Using Displacement Correlation Techniques
\nAbdulnaser A. Alshoaibi & Ahmad Kamal Ariffin<\/sup><\/span><\/span>Abstract<\/span>
The simulation of crack propagation relies on accurate computing of stress intensity factors (SIFs) at crack\u00a0tips. Numerical methods are used to calculate the crack propagation path based on the computation of\u00a0the crack incremental direction and stress intensity factors K1, K11 from the finite element response. This\u00a0paper evaluates a nodal displacement method used for prediction of stress intensity factors.The method\u00a0evaluated is the displacement correlation technique (DCT). The DCT is used when the singular element is\u00a0present at the crack tip, and it uses the differential displacements for the adjacent nodes across the crack\u00a0to compute the stress intensity factors. The crack path and its stress intensity factors are calculated in a\u00a0specialised finite element program, using small crack increments.At each crack propagation step, the mesh\u00a0is automatically refined based on automatic adaptive strategy that takes into account the estimation of\u00a0stress analysis in two-dimension elastoplastic fracture. Crack has been modelled to propagate through\u00a0the inter-element in the mesh. The crack is free to propagates without predetermine path direction.\u00a0Maximum principal normal stress criterion is used as the direction criterion.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-07<\/a><\/span><\/td>\n
\"download<\/a>Page 75-81<\/span><\/td>\n<\/tr>\n
8.<\/td>\nApplication of Monte Carlo Simulation for Free Piston Engine Cylinder Block Design
\nNuraini Abdul Aziz, Ahmad Kamal Ariffin Mohd Ihsan, Mohd Jailani Mohd Noor & Nordin Jamaluddin<\/sup><\/span><\/span>Abstract<\/span>
This paper presents a stochastic simulation study to take account these uncertainties in a cylinder block\u00a0structure of free piston engine. The computational stochastic structural mechanics and analysis allows\u00a0a rational treatment of statistical uncertainties involved in structural analysis and design. It consists\u00a0a stochastic simulation of the static analysis of the model structure where the analysis was executed\u00a0from finite element software. The simulation study produces a data that identify the design input and\u00a0output parameter that need to be optimised based on Monte Carlo method. By executing the design\u00a0improvement analysis in the Simulation process, multiple solutions arrived from the target behaviour,\u00a0which have been specified for the structure. For this cylinder model, it is found that from improvement\u00a0design there is a significant r~uce in stress value of 18.2 MPa, modulus of elasticity for material “E2 of\u00a0160,200 MPa and increasing in modulus of elasticity for material 2, E2 of 71,1 00 MPa by controlling the\u00a0target behaviour maximum displacement of the cylinder, Lmax<\/sub> .The correlations between these variables max ,were shown in the study, which allow designers to identify the strength of the relationship between\u00a0variables and the uncertainties in the design.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-08<\/a><\/span><\/td>\n
\"download<\/a>Page 83-93<\/span><\/td>\n<\/tr>\n
9.<\/td>\nNumerical Modelling of Cyclic Stress-Strain Behaviour of Sn Pb Solder Joint During Thermal Fatigue
\nMohd Nasir Tamin & Liew Yek Ban<\/sup><\/span><\/span>Abstract<\/span>
This study examines the cyclic stress-strain response of solder joints in a surface mounted electronic\u00a0assembly due to temperature cycles. For this purpose, a three dimensional model of an electronic test\u00a0package is analyzed using finite element method. The model consists of 92 solder joints arranged along\u00a0the peripheral of a 24 x 24 solder array. The various different materials considered in the simulation are\u00a0Si-die, 60Sn-40Pb solder alloy, Cu-traces, Cu6SnS intermetallics, FR-4 substrate and printed circuit board\u00a0(PCB). The temperature and strain rate dependent plastic stress-strain curves define the viscoplastic\u00a0response of the near-eutectic solder alloys. Orthotropic behavior of the FR-4 substrate and PCB is modeled.\u00a0Other materials are assumed to behave elastically with temperature dependent material properties.\u00a0Temperature loading of the package consists of an initial cooling down from the re-flow temperature at\u00a0183\u00b0C to 25\u00b0C followed by thermal cycling between -40\u00b0C to 125\u00b0C. Results of the analysis showed that\u00a0the package warps with a magnitude of 93 um at 25\u00b0C after re-flow. ln this process, the critical solder\u00a0joint accumulated an inelastic strain of 0.856 percent. Faster temperature ramp rate at 370\u00b0C\/min (load\u00a0case TR1) versus 33\u00b0C\/min (load case T(1) resulted in 12 percent lower inelastic strain after completing 3\u00a0temperature cycles. However, the inelastic strain magnitude is achieved in a much shorter time.The shear\u00a0stress-strain hysteresis loops display the largest strain ranges compared to other stress-strain components.\u00a0The calculated shear strain range is 0.8 percent with the corresponding stress range of 34.0 MPa.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-09<\/a><\/span><\/td>\n
\"download<\/a>Page 95-106<\/span><\/td>\n<\/tr>\n
10.<\/td>\nThe Design Improvement of Hip Implant for Total Hip Replacement (THR)
\nSolehuddin Shuib, Barkawi Sahari, Amran Ahmed Shokri & Chew Soon Chai<\/sup><\/span><\/span>Abstract<\/span>
Hip implants are artificial joints that are made of metal such as titanium or stainless-steel, and have long\u00a0stems which penetrate deep into the femur canal to hold them in place. It is generally used when there\u00a0is biological damage in human hip joint. Research also shows that the number of person that underwent\u00a0this type of surgical operation is increasing every year especially for the elderly with the age group of 65\u00a0and above. The purpose of this project is to study improvements on hip implant and propose a design that\u00a0mostly fulfills the aspects for designing a hip implant. There are many aspects to consider in designing\u00a0hip implant such as stiffness, implant characteristic and size of the implant. Materials are also one of the\u00a0most important aspects in designing a hip implant because it has a positive relation to the stiffness of the\u00a0implant. The materials that commonly used are Titanium and Stainless-steel. The analysis was performed\u00a0by using COSMOSWorks Software. It helped in studying the reliability, failure and optimum stress that\u00a0the newly designed implant can withstand. In this project, the results showed that the factor of safety\u00a0(FOS) of the implant is 1.4.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-10<\/a><\/span><\/td>\n
\"download<\/a>Page 107-113<\/span><\/td>\n<\/tr>\n
11.<\/td>\nCrack Propagation of Metal Powder Compact
\nSuraya Mohd Tahir, Ahmad Kamal Ariffin, Norhamidi Muhamad & Nik Abdullah Nik Mohamed<\/sup><\/span><\/span>Abstract<\/span>
Simulation of crack propagation in metal powder during the cold compaction process is presented in\u00a0this paper. Based on a fracture criterion of granular materials in compression, a displacement based finite\u00a0element model has been developed to simulate the fracture process in a multi level component made\u00a0of iron powder. Estimation of fracture toughness variation with relative density is established in order to\u00a0provide the fracture parameters as compaction proceeds.A finite element model with adaptive remeshing\u00a0technique is used to accommodate changes in geometry during the compaction and fracture process,\u00a0while friction between crack faces is modelled using the six nodes isoparametric interface elements.\u00a0Two widely used yield criteria for powder compact, namely Mohr-Coulomb and Elliptical cap are used\u00a0in the models. Different crack growth patterns obtained by using these two yield criteria are presented\u00a0and compared in terms of the influence of shear stress and relative density distributions. Even though\u00a0the crack starts at different compaction step and different crack patterns are obtained when different\u00a0yield criteria is used, shear crack is predicted to starts in the region with lower relative density and higher\u00a0shear stress in both models.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-11<\/a><\/span><\/td>\n
\"download<\/a>Page 115-124<\/span><\/td>\n<\/tr>\n
12.<\/td>\nHeat Transfer Analysis In Magnet Housing of Linear Generator Using Finite Element Method
\nTulus, Ahmad Kamal Ariffin, S. Abdullah & Norhamidi Muhamad<\/sup><\/span><\/span>Abstract<\/span>
This paper presents the heat transfer model of magnet housing in the linear combustion engine\u00a0incorporating a combustion chamber and a kickback chamber.The heat transfer has been analyzed for\u00a0the magnet and coils according to heat conducted from combustion and generated by current flowing\u00a0through coils.By using the finite element method the problem has been analyzed using thermal analysis.\u00a0The temperature distribution in magnet surrounding is considered. The results show that most of heat\u00a0comes from the combustion chamber. The heat generated by the coils can rise the magnet temperature.\u00a0The temperatures in the magnet are between 375 K and 382 K.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-12<\/a><\/span><\/td>\n
\"download<\/a>Page 125-133<\/span><\/td>\n<\/tr>\n
13.<\/td>\nDevelopment of The Four-Cylinder Moving Mesh Model for A 1.6 Litre Four-Stroke Direct-Injection Engine
\nShahrir Abdullah, Wendy Hardyono Kurniawan, Kamaruzzaman Sopian & Zulkifli Mohd Nopiah<\/sup><\/span><\/span>Abstract<\/span>
The design of a modern internal combustion engine requires the use of advanced analysis and\u00a0development tools to carry out an in-depth investigation on internal combustion process and\u00a0computational fluid dynamics (CFD) simulation by using high performance computers. In this work, the\u00a0algorithm for moving or deformed mesh for a 1.6-litre four-cylinder four-stroke direct-injection engine\u00a0has been developed.This type of mesh is required for transient simulation of fluid flow and combustion\u00a0process inside the combustion chamber of an internal combustion engine.This mesh deforms with the\u00a0movement of intake and exhaust valves as well as piston. Hence, the purpose of the work is to verify the\u00a0moving mesh algorithm and to establish the correct mesh configuration at any crank angle. The simulation\u00a0covers the full engine cycle consisting of intake, compression, power and exhaust strokes and the order\u00a0of piston motion is set according to the firing order of the selected engine. The algorithm established\u00a0defines events in which any of the designated engine component moves in terms of time and duration\u00a0of occurrence. The verification of the algorithm was performed for the whole four-stroke cycle of 720\u00b0\u00a0crank angles, where the positions of the intake valve, exhaust valve, cylinder and piston were updated\u00a0accordingly with respect to crank angle. The finalised algorithm and mesh can be used to simulate the\u00a0in-cylinder fluid flow and internal combustion process for the full engine cycle.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-13<\/a><\/span><\/td>\n
\"download<\/a>Page 135-149<\/span><\/td>\n<\/tr>\n
14.<\/td>\nExperimental Analysis of Noise And Back Pressure for Muffler Design
\nA. K. M. Mohiuddin, Mohd Rashidin Ideres & Shukri Mohd Hashim<\/sup><\/span><\/span>Abstract<\/span>
Exhaust noise of internal combustion engines is known to be the biggest pollutant of the present day\u00a0urban environment. Proper design of the muffler is essential for the overall performance of the car. The\u00a0main objective of this paper is to find the relationship between the back pressure and the noise level. Back\u00a0pressure represents the extra static pressure exerted by the muffler on the engine through restrictions\u00a0in the flow of exhaust gases. This needs to be kept to a minimum. The relationship between the noise\u00a0and the back pressure is inversely proportional; lowering the noise level at the tip will result in high back\u00a0pressure. However, this relationship is undesirable as the requirement is to have a quiet muffler with a\u00a0small back pressure (ideal muffler). The design of the muffler chamber separation and arrangement is\u00a0essential in determining the muffler characteristics. Some design considerations are proposed in order\u00a0to come up with an optimum muffler design.The experimental data show a general shape of an average\u00a0design of the muffler which would be the most suitable for the test car.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-14<\/a><\/span><\/td>\n
\"download<\/a>Page 151-161<\/span><\/td>\n<\/tr>\n
15.<\/td>\nModelling and Simulation of Disc Brake Contact Analysis and Squeel
\nAbd. Rahim Abu Bakar, Huajiang Ouyang & Mohd Kameil Abdul Hamid<\/sup><\/span><\/span>Abstract<\/span>
Predicting disc brake squeal by means of the complex eigenvalue method has been a popular approach in\u00a0the brake research community owing to its advantages over the dynamic transient method.The positive\u00a0real parts of the complex eigenvalue reflect the degree of instability of the brake system and are thought\u00a0to indicate the likelihood of squeal occurrence.This paper studies the disc brake squeal using a detailed\u00a03-dimensional finite element (FE) model of a real disc brake. First, the FE model is validated through modal\u00a0analysis both at component and assembly levels. Then, a number of possible structural modifications\u00a0for suppressing unstable vibration are carried out. The effect of contact pressure distributions on squeal\u00a0propensity is also investigated. Lastly, a plausible modification is proposed which should result in reduced\u00a0positive real parts of the eigenvalues and hence produce better squeal noise performance.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-15<\/a><\/span><\/td>\n
\"download<\/a>Page 163-173<\/span><\/td>\n<\/tr>\n
16.<\/td>\nA Novelty Detection Technique for Machine Condition Monitoring Using S. O. M
\nM. L. Dennis<\/sup><\/span><\/span>Abstract<\/span>
This paper presents a novelty detection based method for machine condition monitoring (MCM) using\u00a0Kohonen’s self-organising map (S.O.M.). As the fault data set is difficult to acquire in MCM problems, the method requires only the knowledge of normal condition data set. By exploiting S.O.M.’s ability\u00a0of multi-dimensional mapping, the Euclidean distance between the S.O.M. and the data under test is\u00a0used to discriminate anomaly from normal condition. A set of real world condition monitoring data is\u00a0used to evaluate the method presented. Experimental result shows high accuracy and reliability of this\u00a0method.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-16<\/a><\/span><\/td>\n
\"download<\/a>Page 175-182<\/span><\/td>\n<\/tr>\n
17.<\/td>\nClassification of Human Heart Abnormality Using Time-Frequency and Image Processing Technique
\nFadzlul Rahimi Ahmad Bustami, Mohd Hanif Md. Saad, Mohd Jailani Mohd Nor & Bilkis Banu Aziz<\/sup><\/span><\/span>Abstract<\/span>
This paper describes heart abnormalities classification procedures utilising features obtained from\u00a0time-frequency spectogram of ECG heart and image processing techniques. Enhanced spatial features\u00a0of time-frequency spectogram were extracted and fed into a forward chaining expert system and the\u00a0corresponding abnormalities were identified. A confidence factor is calculated for every classification\u00a0result indicating the degree of belief that the classification is true. It was observed that the classification\u00a0method was able to give 100% correct classification based on features that was extracted from data sets\u00a0which were included in the knowledge base and data sets which were not included in the knowledge\u00a0base.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-17<\/a><\/span><\/td>\n
\"download<\/a>Page 183-190<\/span><\/td>\n<\/tr>\n
18.<\/td>\n\n

Vibration Fatige Analysis of Two-Stroke Free Piston Engine Using Frequency Response Approach
\nMd. Mustafizur Rahman & Ahmad Kamal Ariffin<\/sup><\/span><\/span>Abstract<\/span>

This paper describes a vibration fatigue analysis techniques to predict the fatigue life using the frequency\u00a0response approach. The life prediction results are useful for improving the component design at a very\u00a0early development stage. The finite element modeling and frequency response analysis have been\u00a0performed using the finite element analysis software. In addition, the fatigue life prediction was carried\u00a0out using both the time domain and frequency response methods. From the results, it is observed that\u00a0the Dirlik method gives the best comparable results pseudo-static time domain approach with the\u00a0frequency response techniques. This paper also describes how this technique can be implemented in\u00a0the finite element environment to rapidly identify critical areas in the structure.This approach is capable\u00a0of determining premature products failure phenomena. Therefore, it can reduce time to market, improve\u00a0product reliability and customer confidence.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-18<\/a><\/span><\/p>\n<\/td>\n
\"download<\/a>Page 191-203<\/span><\/td>\n<\/tr>\n
19.<\/td>\nSimulation of Flow-Mode Performance Due to Harmonic and Abrupt Excitation
\nReiza Zakia Mukhlis, Nik Abdullah Nik Mohamed & Mohd Jailani Mohd Nor<\/sup><\/span><\/span>Abstract<\/span>
This paper discusses the performance of the suspension system that implements the flow-mode\u00a0electrorheological damper in controlling the unwanted vibration caused by road surface irregularities.\u00a0First, a mathematical model to determine damping coefficient of the damper was developed based on the\u00a0fluid flow behavior in the gap between two electrodes.To evaluate the performance, the system is then\u00a0simulated in two kind of road excitation; abrupt excitation and harmonic excitation. The performance is\u00a0characterised by the level of ride comfort and road handling. The passenger ride comfort was evaluated\u00a0by the force transmitted from the road to the passenger and by the vertical acceleration of the sprung\u00a0mass, while the vehicle road handling was evaluated by the wheel hop and the amplification ratio. The\u00a0result showed that the system can obtain the best compromise between road handling and ride comfort\u00a0by adjusting the electric field strength that is applied to the damper.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-19<\/a><\/span><\/td>\n
\"download<\/a>Page 205-214<\/span><\/td>\n<\/tr>\n
20.<\/td>\nIdentification of Driver’s Fittness Using Video Images and Steering Based Features
\nRuzelita Ngadiran, Mohd Jailani Mohd Nor, Mohd Hanif Md. Saad & Yohan Kurniawan<\/sup><\/span><\/span>Abstract<\/span>
Driver’s Fitness is defined as a measure of a person’s physical strength, flexibility, and endurance to\u00a0drive.Two main factors that lead to unfit driver are drowsiness and fatigue.This paper discusses features\u00a0extracted from live video of drivers and steering wheel displacement to identify the relative state of\u00a0driver’s fitness. A software based system, Driver’s Fitness Monitoring and Training System (DFMTS) was\u00a0developed for to acquire the required data, extract the selected features and identify driver’s fitness.\u00a0Fifteen participants were tested in an automotive simulator. Results obtained showed that there are\u00a0identical patterns of the selected features found among the unfit driver’s.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-20<\/a><\/span><\/td>\n
\"download<\/a>Page 215-224<\/span><\/td>\n<\/tr>\n
21.<\/td>\nKesan Kemodularan Reka Bentuk Terhadap Kebolehsenggaran Produk: Satu Kajian Kes (The Effects of Modularity Design on the Maintainability of A Domestic Product: A Case Study)
\n<\/em>Dzuraidah Abd. Wahab, Kong Ee Ching & Tan Ai Boay<\/sup><\/span><\/span>Abstract<\/span>
This paper reports the study on maintainability of a domestic product from the aspect of design modularity.\u00a0In the study, the clustering technique was applied to the domestic product, an electric coffee maker in order to\u00a0identify its functional components and the interactions between the components of the product. The service\u00a0modes of the product were identified in order to ascertain the level of maintenance difficulty faced by the user.\u00a0Guidelines in design for maintainability were applied during modifications to the existing design, focusing\u00a0on three components in the main module of the product namely the cover of the base, the spraying unit and\u00a0the cover of the strainer aperture. Result from the study has shown that considerations on design modularity\u00a0and maintainability requirements at the early stage of product design, has enabled product maintenance \u00a0to be identified and planned in more systematic and effective manner. The proposed new design would certainly enhance the maintainability of the product.<\/div><\/span>DOI :\u00a0dx.doi.org\/10.17576\/jkukm-2008-20-21<\/a><\/span><\/td>\n
\"download<\/a>Page 225-234<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Table of Contents No. Article Detail 1. A Case Study on The Implementation of Quality Control Circle In The Production Line of A Manufacturing Company …<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-full-width.php","meta":{"footnotes":""},"folder":[],"class_list":["post-551","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ukm.my\/jkukm\/wp-json\/wp\/v2\/pages\/551","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ukm.my\/jkukm\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ukm.my\/jkukm\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ukm.my\/jkukm\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ukm.my\/jkukm\/wp-json\/wp\/v2\/comments?post=551"}],"version-history":[{"count":49,"href":"https:\/\/www.ukm.my\/jkukm\/wp-json\/wp\/v2\/pages\/551\/revisions"}],"predecessor-version":[{"id":2277,"href":"https:\/\/www.ukm.my\/jkukm\/wp-json\/wp\/v2\/pages\/551\/revisions\/2277"}],"wp:attachment":[{"href":"https:\/\/www.ukm.my\/jkukm\/wp-json\/wp\/v2\/media?parent=551"}],"wp:term":[{"taxonomy":"folder","embeddable":true,"href":"https:\/\/www.ukm.my\/jkukm\/wp-json\/wp\/v2\/folder?post=551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}