Journal of Applied Engineering Design and Simulation最新文献

{"title":"The Analysis of Fluid Flow on Different Kapok Filter Orientations using Computer Fluid Dynamics","authors":"Azizul Hakim Samsudin, Ab Aziz Mohd Yusof, Norhafini Hambali, Mohammad Abdullah, Nur Darina Ismail","doi":"10.24191/jaeds.v3i2.63","DOIUrl":"https://doi.org/10.24191/jaeds.v3i2.63","url":null,"abstract":"Kapok fibres, known for their hydrophobic (water-repellent) and oleophilic (oil-attracting) properties, could be used as a filtration medium. In the context of oily water filtration, kapok fibres might naturally attract and capture oil droplets from the water while allowing water to pass through. However, the effectiveness of the filtering process depends on the filter orientation, which affects the fluid flow, either turbulent or laminar. Thus, the study investigated the effect of filter orientation housing during installation on the fluid flow around the kapok filter. The study used Computational fluid dynamic analysis, CFD, for two different kapok filter orientations, parallel and perpendicular to the water flow. It found that the kapok filter oriented perpendicular generates turbulence on the surrounding flow and hydraulic jump as compared to parallel orientation. A higher risk of clogging could happen due to debris accumulation and reduced filtering process.","PeriodicalId":484253,"journal":{"name":"Journal of Applied Engineering Design and Simulation","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136100952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analytical prediction of fatigue resistance of additively manufactured aluminium alloy based on Murakami method","authors":"Matthias Oberreiter, Nik Nur Khaleeda Nik Norzainal Abidin,, Michael Stoschka, Yupiter HP Manurung, Mohd Shahriman Adenan, Renga Rao Krishnamoorthy","doi":"10.24191/jaeds.v3i2.66","DOIUrl":"https://doi.org/10.24191/jaeds.v3i2.66","url":null,"abstract":"This research is devoted to analyze the stress state and fatigue strength of two specimens made by a newly developed high-strength aluminium alloy produced by the wire arc additive manufacturing (WAAM) process. The relationship between fatigue strength and flaw size was calculated based on the root squared area – a parameter by conventional Murakami’s equation which is a widely used analytical approach for predicting fatigue resistance in metallic materials. The research involves the metallographic preparation process on two aluminum alloy labeled HS-Al-A and HS-Al-B followed by Vickers hardness measurement. Further, the image of the observed pores was processed and dimensioned using an open-sourced software ImageJ by considering pixels and actual distance as well as by defining image threshold value for measuring pore sizes. The analytical approach is conducted in order to describe the maximum stress intensity factor Kmax at the crack front and to assess the fatigue strength σFS. As final results, specimen A has an average pore area of ≈65 µm with Kmax of 333.75 MPa∙√m and σFS of 137 MPa, while specimen B has an average pore area of ≈42 µm with Kmax of 325.13 MPa∙√m and σFS of 153 MPa. Overall, this research allows the formulation of a method for estimating fatigue strength of large defects leading to a conclusion that flaws can influence the fatigue resistance of the material so that the bigger the flaw size is, the lower σFS and the higher the Kmax.","PeriodicalId":484253,"journal":{"name":"Journal of Applied Engineering Design and Simulation","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136100954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Residual Stress Measurements on Rectangular Specimen SS316L using Numerical Computation Software and Selective Laser Melting","authors":"Micheal Stoschka, Liyana Balqis Shamsuri, Stefan Fladischer, Thoufeili Taufek, Yupiter HP Manurung, Mohd Shahriman Adenan, Renga Rao Krishnamoorthy","doi":"10.24191/jaeds.v3i2.67","DOIUrl":"https://doi.org/10.24191/jaeds.v3i2.67","url":null,"abstract":"This research aimed to predict the residual stress of additively manufactured rectangular specimen using Selective Laser Melting (SLM) by means of non-linear numerical computation based on Thermo-mechanical method (TMM). The procedure starts with the geometrical and material modelling of rectangular specimen with regards to Austenitic Stainless Steel 316L (SS316L) in which the temperature dependent material data properties such as Young’s Modulus, Thermal Expansion Coefficient, Specific Heat Capacity and Thermal Conductivity are taken into account. The next phase consists of numerical computation procedure which is where the specimen is position 60° of inclination angle from the substrate plate. The support structure is to be generated within the lower surface of the specimen in order to avoid material to collapse during printing process. Laser heat source is to be modelled based on the laser beam width, power, efficiency and scanning speed in order for the numerical computation to accurately predict the thermal problem in SLM process. Furthermore, layer parameters used to fabricate the specimen such as hatch distance, hatch scan width and layer thickness are taken into TMM consideration. Similar set-up from numerical computation by means of laser and layer parameters to fabricate SS316L rectangular specimen is utilized in real fabrication process using SLM machine, Renishaw RenAM 500E. After fabrication of the specimen, electropolishing as for the sample preparation for X-Ray Diffraction (XRD) measurement are to be conducted by means of various depth on both sides of the specimen. For the validation procedure, residual stress on every depth is to be analysed and compared with the result from numerical computation. In conclusion, TMM simulation forecasting an acceptable residual stress on SLM product with relative error up to 14% and the computational time taken to predict the residual stress is only 56 minutes. This exploratory research using TMM simulation to predict residual stress on SLM product could benefit metal additive manufacturing (MAM) production as a whole by neglecting expensive trial and error approach.","PeriodicalId":484253,"journal":{"name":"Journal of Applied Engineering Design and Simulation","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136100953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Investigation of Indoor Air Temperature Effects for Different Types of Window Dimensions Using CFD Simulation","authors":"Siti Shareeda Mohd Nasir, Nor Azirah Mohd Fohimi, Norasikin Hussin, Rohidatun Mahmod@Wahab, Nurulsaidatulsyida Sulong","doi":"10.24191/jaeds.v3i2.65","DOIUrl":"https://doi.org/10.24191/jaeds.v3i2.65","url":null,"abstract":"Windows plays an important role in heat transfer and natural ventilation in buildings. In the field of building design, the challenge is to provide a thermally comfortable indoor environment that requires the least energy consumption to maintain. One of the energy reduction alternatives that can be incorporated into modern building design is the installation of efficient windows. The windows should allow thermally acceptable indoor air quality and have a pleasant design while being energy efficient. Good thermal conditions in school buildings, especially learning spaces, promote the educational process. Unfulfilling comfort levels can reduce the lecturers’ and students' physical and intellectual performance. One of the variables that affect the thermal comfort condition is indoor air temperature. The purpose of this study is to investigate the effect of window size on indoor air temperature by using Computational Fluid Dynamics (CFD) simulation. The selected classroom at Universiti Teknologi MARA (UiTM) Permatang Pauh, Pulau Pinang will be used as a case study. The field measurement result can be used to validate the simulation result. The simulation result will be compared to standard regulations set by the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) Standard 55-2017. Three different sizes of windows have been chosen in this study which are double, triple, and quadruple-glazed windows. The validation result shows the percentage difference in indoor air temperature between the experimental and simulation is 1.04 %. The result found double and triple-glazed windows show the value of temperature under the range set by ASHRAE Standard 55-2017. The selection of triple-glazed windows is more suitable because the brightness of the classroom meets the criteria for the absence of direct solar radiation. In conclusion, the size of the window shows the performance in terms of heat transfer and indoor air temperature of the classroom.","PeriodicalId":484253,"journal":{"name":"Journal of Applied Engineering Design and Simulation","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136100955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling Analysis of Earthquake Impact on R.C Buildings in Baghdad using SAP200","authors":"Hasan Ali Abbas, Manaf Raid Salman, Hasanain Muhammad Ghaltan","doi":"10.24191/jaeds.v3i2.69","DOIUrl":"https://doi.org/10.24191/jaeds.v3i2.69","url":null,"abstract":"Most typical commercial reinforced concrete buildings in Iraq were designed using outdated building codes that did not consider horizontal seismic loads; they primarily focused on vertical loads. As a result, there is uncertainty regarding whether these conventional buildings can withstand recent earthquakes in Iraq. In this study, we created a three-dimensional finite element model using SAP2000 to represent scaled versions of typical multistory reinforced concrete commercial structures found in Iraqi cities. The primary objective was to investigate how these structures respond to seismic events, particularly the Ali Al-Gharbee earthquake that struck Maysan Province in southern Iraq in 2012, with a magnitude of Mw=4.9 and PGA=104.151 cm/sec2 as the input ground motion. Our findings indicate that typical multistory reinforced concrete commercial buildings in Iraq can safely withstand earthquakes. However, when the magnitude increases to approximately Mw=5.2 (PGA=156 cm/sec2), some members may experience cracking and exceed allowable drift limits. If the magnitude reaches about Mw=6 (PGA=208 cm/sec2), these buildings may experience complete failure.","PeriodicalId":484253,"journal":{"name":"Journal of Applied Engineering Design and Simulation","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136100608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and Simulation Via Flexsim for Kitting Trolley Design of Rear Car Seat Assembly Process","authors":"Nursalbiah Nasir, Ahmad Fikri Sarimi, Helmi Rashid, Nurul Atikah Azis","doi":"10.24191/jaeds.v3i2.70","DOIUrl":"https://doi.org/10.24191/jaeds.v3i2.70","url":null,"abstract":"It was discovered that the material retrieval system used for a Sweden brand car seats assembly lines (RB40% and RM60%) in a local seat assembly company was not systematic in its arrangement of the assembly parts and only had a rack trolley that carried all the assembly parts in a poly-box. The workers had to waste time to pre kit the parts prior to assembly process thus could not meet production target. Although kitting trolleys implementation was generally known to help pre-kit earlier at logistic/warehouse department, the fabrication cost and long-term benefit would be affecting company decision to implement kitting trolley in the production line. The study aims to validate kitting trolley implementation efficiency prior to trolley actual fabrication by computer aided simulation. Project started from feasibility study of existing kitting rack trolley in market to conceptual design to detailed design and simulation analysis. Detailed design of the kitting trolley was produced and from the design, time study showed that assembly process per carseat was reduced. Flexsim kitting trolley simulation predicted that the number of car seats produced per day is higher than production quantity target (24 seats per day) for RB40% but still below production target for RB60%. Nonetheless, both showed improvement of hence improving of quantities hence increase company’s productivity and eliminate waste of time.","PeriodicalId":484253,"journal":{"name":"Journal of Applied Engineering Design and Simulation","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136100607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}