Pub Date : 2023-11-29DOI: 10.37934/mjcsm.12.1.1330
Md. Saifi Bin Islam, Muhammad Faiz Ahmed, Abdullah Al Saad
The wing is a critical component of an aircraft, responsible for generating the lift force necessary for flight. The aerodynamic behavior of a wing is complex and is influenced by factors such as air speed, angle of attack, wing shape, twist angle, and turbulence. This research investigates the performance of NACA 4412 and NACA 4418 airfoils using 2D CFD, covering a range of angle-of-attack values from -5 to 20 degrees. The superior performing airfoil, NACA 4412, was selected for wing geometry which outperforms NACA 4418 in terms of lower drag and higher lift coefficient at both low and high Reynolds numbers. Then 3D CFD analysis was employed to study how wings perform at different Reynolds numbers and the optimal twist angle for the wing was determined, focusing on a steady-state analysis. The Reynolds number range which corresponds to the flow velocity range, is used in this numerical study for 3D wings. The result shows that as the Reynolds number increases, the wing’s lift coefficient proportionally rises, owing to higher flow velocities. However, this increase in Reynolds number also results in a higher drag coefficient due to a rise in turbulence. The investigation reveals the existence of an optimum twist angle for the wing, which maximizes the lift-to-drag coefficient ratio, thus enhancing overall aerodynamic performance.
{"title":"Numerical Investigation on the Aerodynamic Characteristics of a Wing for Various Flow and Geometrical Parameters","authors":"Md. Saifi Bin Islam, Muhammad Faiz Ahmed, Abdullah Al Saad","doi":"10.37934/mjcsm.12.1.1330","DOIUrl":"https://doi.org/10.37934/mjcsm.12.1.1330","url":null,"abstract":"The wing is a critical component of an aircraft, responsible for generating the lift force necessary for flight. The aerodynamic behavior of a wing is complex and is influenced by factors such as air speed, angle of attack, wing shape, twist angle, and turbulence. This research investigates the performance of NACA 4412 and NACA 4418 airfoils using 2D CFD, covering a range of angle-of-attack values from -5 to 20 degrees. The superior performing airfoil, NACA 4412, was selected for wing geometry which outperforms NACA 4418 in terms of lower drag and higher lift coefficient at both low and high Reynolds numbers. Then 3D CFD analysis was employed to study how wings perform at different Reynolds numbers and the optimal twist angle for the wing was determined, focusing on a steady-state analysis. The Reynolds number range which corresponds to the flow velocity range, is used in this numerical study for 3D wings. The result shows that as the Reynolds number increases, the wing’s lift coefficient proportionally rises, owing to higher flow velocities. However, this increase in Reynolds number also results in a higher drag coefficient due to a rise in turbulence. The investigation reveals the existence of an optimum twist angle for the wing, which maximizes the lift-to-drag coefficient ratio, thus enhancing overall aerodynamic performance.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139213645","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}
Mohd Shukor Salleh, Ammar Abd Rahman, Mohd Fairuz Jaafar, Salah Salman Al-Zubaidi
Carbon-fibre-reinforced plastic is prominent with superb specific mechanical properties that contribute to its application in high technology industries, such as aircraft and automobiles' mechanical structures. These materials are considered hard to cut. The delamination issues frequently arise due to their anisotropy and inhomogeneity. In aircraft manufacturing, thousands of holes are required to assemble the structural parts. Hole perpendicularity issues undoubtedly might happen during manual drilling. The main purpose of this work is to study the effects of various minor slant drilling angles on thrust force generation and delamination by using a special drill reamer. From the investigation, the drilling penetration angle significantly impacted the delamination. The delamination factor for the entry and exit sides of holes relatively decreased from 1.042 and 1.087 to 1.027 and 1.049, respectively, as the thrust force declined from 114.8 N to 106.5 N from 5° to 0° drilling angle.
{"title":"Effect of Drilling Penetration Angle on Delamination for One-Shot Drilling of Carbon Fiber Reinforced Plastic (CFRP)","authors":"Mohd Shukor Salleh, Ammar Abd Rahman, Mohd Fairuz Jaafar, Salah Salman Al-Zubaidi","doi":"10.37934/mjcsm.8.1.110","DOIUrl":"https://doi.org/10.37934/mjcsm.8.1.110","url":null,"abstract":"Carbon-fibre-reinforced plastic is prominent with superb specific mechanical properties that contribute to its application in high technology industries, such as aircraft and automobiles' mechanical structures. These materials are considered hard to cut. The delamination issues frequently arise due to their anisotropy and inhomogeneity. In aircraft manufacturing, thousands of holes are required to assemble the structural parts. Hole perpendicularity issues undoubtedly might happen during manual drilling. The main purpose of this work is to study the effects of various minor slant drilling angles on thrust force generation and delamination by using a special drill reamer. From the investigation, the drilling penetration angle significantly impacted the delamination. The delamination factor for the entry and exit sides of holes relatively decreased from 1.042 and 1.087 to 1.027 and 1.049, respectively, as the thrust force declined from 114.8 N to 106.5 N from 5° to 0° drilling angle.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125777980","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}
Rahimah Abdul Hamid, Siti Nur Hidayah Husni, Teruaki Ito, Barbara Sabine Linke
Due to the layer-by-layer printing process, additively manufactured objects frequently display directional dependencies in their structure. It affects the material properties of the fabricated parts concerning various process parameters of the machine. This paper presents the effect of layer thickness and printing orientation on the mechanical properties and microstructure of polylactic acid (PLA)3D printed parts fabricated by Fused Deposition Modeling (FDM). Computer-aided design models of a tensile and compression test specimen were created, conforming to the ASTM: D638 (Type 1 and Type IV) and ASTM D695, respectively. The microstructure was evaluated using a Scanning Electron Microscope (SEM) on the fracture surface during the tensile test and optical microscopy on the compression specimens. The finding shows that a low layer thickness setting contributes to the highest tensile strength in the 0° printing orientation, while a medium and high layer thickness results in a better tensile strength for a 45° and 90° printing orientation. Therefore, printing orientation is more influential than layer thickness in the tensile test. As for the compressive strength, the stress decreases when the layer thickness increases and the low layer thickness setting offers the highest compressive strength at all printing orientations. The microstructure shows more significant interlayer gaps, incomplete filling, and weak bonding on the cross-sectional samples of the fractured tensile surface with lower strength. The 0° printing orientation offers better tensile strength for all layer thicknesses, minimum build time, and good compressive strength compared to other printing orientations.
{"title":"Effect of Printing Orientation and Layer Thickness on Microstructure and Mechanical Properties of PLA Parts","authors":"Rahimah Abdul Hamid, Siti Nur Hidayah Husni, Teruaki Ito, Barbara Sabine Linke","doi":"10.37934/mjcsm.8.1.1123","DOIUrl":"https://doi.org/10.37934/mjcsm.8.1.1123","url":null,"abstract":"Due to the layer-by-layer printing process, additively manufactured objects frequently display directional dependencies in their structure. It affects the material properties of the fabricated parts concerning various process parameters of the machine. This paper presents the effect of layer thickness and printing orientation on the mechanical properties and microstructure of polylactic acid (PLA)3D printed parts fabricated by Fused Deposition Modeling (FDM). Computer-aided design models of a tensile and compression test specimen were created, conforming to the ASTM: D638 (Type 1 and Type IV) and ASTM D695, respectively. The microstructure was evaluated using a Scanning Electron Microscope (SEM) on the fracture surface during the tensile test and optical microscopy on the compression specimens. The finding shows that a low layer thickness setting contributes to the highest tensile strength in the 0° printing orientation, while a medium and high layer thickness results in a better tensile strength for a 45° and 90° printing orientation. Therefore, printing orientation is more influential than layer thickness in the tensile test. As for the compressive strength, the stress decreases when the layer thickness increases and the low layer thickness setting offers the highest compressive strength at all printing orientations. The microstructure shows more significant interlayer gaps, incomplete filling, and weak bonding on the cross-sectional samples of the fractured tensile surface with lower strength. The 0° printing orientation offers better tensile strength for all layer thicknesses, minimum build time, and good compressive strength compared to other printing orientations.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134016143","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}
Nur Aiman Hanis Hasim, Suriati Akmal, Sayed Kushairi Sayed Nordin, Ruzy Haryati Hambali, Mohd Fauzi Mamat, Abdulla Thamer Jumma Aldharif Alshamsi, Supawi Pawenang
This paper investigates the enabler factors of total quality management (TQM) practices for a composite manufacturing company in Melaka, Malaysia. Leadership (L), training and education (TE), supplier management (SM), customer focus (CF), benchmarking (B), continuous improvement (CI), employee relations (ER), and strategic planning (SP) were considered in this paper. They are the critical TQM elements that influence TQM processes (Y). A questionnaire was used to collect data from 27 employees of a composite manufacturing company in Melaka, Malaysia and analyzed using multiple regression analysis. Five out of the eight hypotheses positively fit with the conceptual model and show a positive effect of TQM practices. The research findings indicate that enabler factors, namely leadership (L), continuous improvement (CI), supplier management (SM), benchmarking (B) and strategic planning (SP), have positive and significant effects on successful TQM practices. This study would benefit managers significantly to increase strategic planning, supply chain management, and benchmarking through TQM practices.
{"title":"Modelling Total Quality Management in the Malaysian Composite Manufacturing Industry","authors":"Nur Aiman Hanis Hasim, Suriati Akmal, Sayed Kushairi Sayed Nordin, Ruzy Haryati Hambali, Mohd Fauzi Mamat, Abdulla Thamer Jumma Aldharif Alshamsi, Supawi Pawenang","doi":"10.37934/mjcsm.7.1.1122","DOIUrl":"https://doi.org/10.37934/mjcsm.7.1.1122","url":null,"abstract":"This paper investigates the enabler factors of total quality management (TQM) practices for a composite manufacturing company in Melaka, Malaysia. Leadership (L), training and education (TE), supplier management (SM), customer focus (CF), benchmarking (B), continuous improvement (CI), employee relations (ER), and strategic planning (SP) were considered in this paper. They are the critical TQM elements that influence TQM processes (Y). A questionnaire was used to collect data from 27 employees of a composite manufacturing company in Melaka, Malaysia and analyzed using multiple regression analysis. Five out of the eight hypotheses positively fit with the conceptual model and show a positive effect of TQM practices. The research findings indicate that enabler factors, namely leadership (L), continuous improvement (CI), supplier management (SM), benchmarking (B) and strategic planning (SP), have positive and significant effects on successful TQM practices. This study would benefit managers significantly to increase strategic planning, supply chain management, and benchmarking through TQM practices.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134318335","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}
In this article, environmentally-friendly alkyd coatings with different graphene oxide (GO) content of 0-1.5 weight percent (wt. %) were prepared for improving mechanical properties, corrosion protection and thermal oxidation resistance of coatings. GO in the coating was characterized by FT-IR. The corrosion resistance of environmentally- friendly alkyd coatings containing GO was investigated by salt fog testing. Effects of GO content on adhesion, flexural strength, relative hardness and thermal oxidation stability of alkyd coatings with and without GO were also examined. GO with the content of 1.2 wt. % significantly improved mechanical properties, corrosion resistance, thermal oxidation resistance of environmentally-friendly alkyd coatings.
{"title":"Improvement of Environmentally-Friendly Alkyd Composite Coating with Graphene Oxide","authors":"THANH Nguyen Trung","doi":"10.37934/mjcsm.7.1.110","DOIUrl":"https://doi.org/10.37934/mjcsm.7.1.110","url":null,"abstract":"In this article, environmentally-friendly alkyd coatings with different graphene oxide (GO) content of 0-1.5 weight percent (wt. %) were prepared for improving mechanical properties, corrosion protection and thermal oxidation resistance of coatings. GO in the coating was characterized by FT-IR. The corrosion resistance of environmentally- friendly alkyd coatings containing GO was investigated by salt fog testing. Effects of GO content on adhesion, flexural strength, relative hardness and thermal oxidation stability of alkyd coatings with and without GO were also examined. GO with the content of 1.2 wt. % significantly improved mechanical properties, corrosion resistance, thermal oxidation resistance of environmentally-friendly alkyd coatings.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133140916","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}
Mohd Shahir Kasim, W Noor Fatihah W Mohamad, Raja Izamshah, Noraiham Mohamad, Hairulhisham Rosnan, Syahrul Azwan Sundi, Muhammad Hafiz Hassan, Teruaki Ito, Zamri Mat Kasa
Delamination is one of the main issues during the CFRP cutting process. This problem attracts researchers to investigate to meet the stringent quality need. This paper evaluates the influence of Rotary Ultrasonic Assisted Trimming (RUAT) when slotting carbon fiber reinforced plastic (CFRP). The study investigates rotation speed, vibration amplitude, and frequency particularly. The correlation effect of these parameters is to be evaluated by response surface methodology (RSM) to identify the minimum delamination. Seventeen trials were conducted with 38 plies of multi-directional CFRP panel. The trimming quality was determined by the minimum delamination damage of the slotting area analyzed by the ImageJ software. The best slotting quality can be achieved by applying spindle speed, amplitude, and frequency of 5305 rpm, 2.75 µm, and 26.79 kHz.
{"title":"Analysis of Carbon Fiber-Reinforced Polymer Composites Delamination during Vibration Assisted Trimming using Historical Data Design","authors":"Mohd Shahir Kasim, W Noor Fatihah W Mohamad, Raja Izamshah, Noraiham Mohamad, Hairulhisham Rosnan, Syahrul Azwan Sundi, Muhammad Hafiz Hassan, Teruaki Ito, Zamri Mat Kasa","doi":"10.37934/mjcsm.6.1.113","DOIUrl":"https://doi.org/10.37934/mjcsm.6.1.113","url":null,"abstract":"Delamination is one of the main issues during the CFRP cutting process. This problem attracts researchers to investigate to meet the stringent quality need. This paper evaluates the influence of Rotary Ultrasonic Assisted Trimming (RUAT) when slotting carbon fiber reinforced plastic (CFRP). The study investigates rotation speed, vibration amplitude, and frequency particularly. The correlation effect of these parameters is to be evaluated by response surface methodology (RSM) to identify the minimum delamination. Seventeen trials were conducted with 38 plies of multi-directional CFRP panel. The trimming quality was determined by the minimum delamination damage of the slotting area analyzed by the ImageJ software. The best slotting quality can be achieved by applying spindle speed, amplitude, and frequency of 5305 rpm, 2.75 µm, and 26.79 kHz.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121109159","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}
Norhazeratul Mohammad Zainudin, Liew Pay Jun, Ching Yee Yap, Noraiham Mohamad, Jingsi Wang
The present study focused on the surface modification of aluminum 6061 by using electrical discharge coating (EDC) with powder suspension. The effects of peak current (Ip) and pulse on time (Ton) on the coating layer thickness were investigated. This study used Tungsten powder as an additive and mixed it with the kerosene oil and surfactant Span 83. The results indicated that peak current and pulse on-time significantly affected the coating layer thickness. The thinnest coating layer was observed at 3A, 150 µs, while the thickest coating layer with an average value of 17.239 µm was obtained at parameter 4A and 250 µs. In conclusion, the high value of peak current and longer pulse duration on time increased the thickness of the coating layer.
{"title":"Effect of Peak Current and Pulse On Time on the Coating Layer Thickness using Electrical Discharge Coating","authors":"Norhazeratul Mohammad Zainudin, Liew Pay Jun, Ching Yee Yap, Noraiham Mohamad, Jingsi Wang","doi":"10.37934/mjcsm.6.1.1420","DOIUrl":"https://doi.org/10.37934/mjcsm.6.1.1420","url":null,"abstract":"The present study focused on the surface modification of aluminum 6061 by using electrical discharge coating (EDC) with powder suspension. The effects of peak current (Ip) and pulse on time (Ton) on the coating layer thickness were investigated. This study used Tungsten powder as an additive and mixed it with the kerosene oil and surfactant Span 83. The results indicated that peak current and pulse on-time significantly affected the coating layer thickness. The thinnest coating layer was observed at 3A, 150 µs, while the thickest coating layer with an average value of 17.239 µm was obtained at parameter 4A and 250 µs. In conclusion, the high value of peak current and longer pulse duration on time increased the thickness of the coating layer.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122446995","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}
The automotive and aviation fields require engineering materials that can save and optimise fuel consumption. Unique characteristics of lightweight, higher strength to weight ratio, good corrosion resistance, and good castability are indispensable for castable metal such as Silicon Aluminium (Al-Si). The mechanical properties of Al-Si could be further improved through the addition of Cobalt Oxide (CoO) nanoparticles during the casting process. The importance and purpose of this study were to determine the impact toughness, hardness and fracture morphology of Al-Si metal alloy filled with 0.015 wt.% CoO nanofiller at the various melting temperature of 750 °C, 800 °C and 850 °C. The stir casting method was utilised considering the most appropriate method for mixing nanoparticles powder into the Al-Si matrix. Three test specimens were prepared for each temperature variation. Impact testing using the Charpy method (ASTM E23-56 T) and hardness testing using Rockwell Superficial HR15T and fracture morphology obtained from impact testing fractures were performed accordingly. The impact test results showed that the Al-Si added with 0.015% CoO at 800 °C of melting temperature possessed the highest impact toughness value of 25.111 x 10-3 Joule mm-2 than the other variations. The hardness test results showed that Al-Si added 0.015% CoO with a melting temperature of 850 °C had the highest hardness value of 79.52 HR15T. The fracture morphology of the impact test in all specimens shows uniform brittle fracture characteristics. It is found that the melting temperature during the stir-casting process of Al-Si has played a significant role in influencing the resulted properties of Al-Si filled CoO nanoparticles metal matrix composites. The selection of an accurate melting temperature for the stir casting process will affect the resulted properties of produced metal composites.
{"title":"Impact, Hardness and Fracture Morphology of Aluminium Alloy (Al-Si) filled Cobalt Oxide Nanoparticles at Various Stir Casting Temperatures","authors":"Mardy Suhandani, P. Puspitasari, J. Razak","doi":"10.37934/mjcsm.5.1.1120","DOIUrl":"https://doi.org/10.37934/mjcsm.5.1.1120","url":null,"abstract":"The automotive and aviation fields require engineering materials that can save and optimise fuel consumption. Unique characteristics of lightweight, higher strength to weight ratio, good corrosion resistance, and good castability are indispensable for castable metal such as Silicon Aluminium (Al-Si). The mechanical properties of Al-Si could be further improved through the addition of Cobalt Oxide (CoO) nanoparticles during the casting process. The importance and purpose of this study were to determine the impact toughness, hardness and fracture morphology of Al-Si metal alloy filled with 0.015 wt.% CoO nanofiller at the various melting temperature of 750 °C, 800 °C and 850 °C. The stir casting method was utilised considering the most appropriate method for mixing nanoparticles powder into the Al-Si matrix. Three test specimens were prepared for each temperature variation. Impact testing using the Charpy method (ASTM E23-56 T) and hardness testing using Rockwell Superficial HR15T and fracture morphology obtained from impact testing fractures were performed accordingly. The impact test results showed that the Al-Si added with 0.015% CoO at 800 °C of melting temperature possessed the highest impact toughness value of 25.111 x 10-3 Joule mm-2 than the other variations. The hardness test results showed that Al-Si added 0.015% CoO with a melting temperature of 850 °C had the highest hardness value of 79.52 HR15T. The fracture morphology of the impact test in all specimens shows uniform brittle fracture characteristics. It is found that the melting temperature during the stir-casting process of Al-Si has played a significant role in influencing the resulted properties of Al-Si filled CoO nanoparticles metal matrix composites. The selection of an accurate melting temperature for the stir casting process will affect the resulted properties of produced metal composites.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132763171","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}
N. Mohamad, A. A. Latiff, J. Razak, H. E. A. Maulod, P. Liew, M. Kasim, Q. Ahsan
The polypropylene (PP) reinforced with recycled carbon fibres (rCF) was successfully produced using a Haake internal mixer via melt compounding. The compounding was performed at 180°C, rotor speed of 50 rpm and compounding period of 10 minutes. The standard samples for the pin on disc testing were prepared using injection moulding. The effect of rCF filler loadings of 0.5, 1, 3, 5, 7, 10, 13, 15 and 20 wt% was studied for the tribological properties. The results were compared with 100% PP. The morphological behaviours for the effect of low and high fibre loadings were observed using scanning electron microscopy analyses. The composites with low carbon fibre loading of up to 3 wt% imposed higher resistance to dry sliding friction. In contrast, the increment of fibre loading at 5 wt% to 20 wt% decreased the wear rate of the composites due to patch film and transfer film formation. The wear mechanism of the composites for different fibre loading was graphically sketched from morphological observation. As the conclusions, the composites showed promising self-lubricating properties, capable of wear reduction with significant physical and mechanical properties.
{"title":"Morphological Characteristics and Wear Mechanism of Recycled Carbon Fibre Prepreg reinforced Polypropylene Composites","authors":"N. Mohamad, A. A. Latiff, J. Razak, H. E. A. Maulod, P. Liew, M. Kasim, Q. Ahsan","doi":"10.37934/mjcsm.5.1.110","DOIUrl":"https://doi.org/10.37934/mjcsm.5.1.110","url":null,"abstract":"The polypropylene (PP) reinforced with recycled carbon fibres (rCF) was successfully produced using a Haake internal mixer via melt compounding. The compounding was performed at 180°C, rotor speed of 50 rpm and compounding period of 10 minutes. The standard samples for the pin on disc testing were prepared using injection moulding. The effect of rCF filler loadings of 0.5, 1, 3, 5, 7, 10, 13, 15 and 20 wt% was studied for the tribological properties. The results were compared with 100% PP. The morphological behaviours for the effect of low and high fibre loadings were observed using scanning electron microscopy analyses. The composites with low carbon fibre loading of up to 3 wt% imposed higher resistance to dry sliding friction. In contrast, the increment of fibre loading at 5 wt% to 20 wt% decreased the wear rate of the composites due to patch film and transfer film formation. The wear mechanism of the composites for different fibre loading was graphically sketched from morphological observation. As the conclusions, the composites showed promising self-lubricating properties, capable of wear reduction with significant physical and mechanical properties.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133918978","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}
Rahayu Tukimin, W. Mahmood, Maimunah Mohd Nordin, M. R. Muhamad, Numfor Solange Ayuni
Implementation of supplier development (SD) is appropriate for a firm that intends to reduce costs and streamline its operations while minimising defective products. However, the number of practices involved in the SD program is too large, making them difficult to manage. Conventionally, the selection of decisions is based on multicriteria and is often complex and unstructured. Thus, this paper proposed the Analytic Hierarchy Process (AHP) and Fuzzy Analytic Hierarchy Process (FAHP) methodologies to evaluate and select SD practices. Both methods produced the same result. The results obtained can be indicated by the production professionals as guidelines to look for the opportunity to implement the SD program to improve the capabilities of their suppliers.
{"title":"Application of AHP and FAHP Algorithm for Supplier Development Evaluation","authors":"Rahayu Tukimin, W. Mahmood, Maimunah Mohd Nordin, M. R. Muhamad, Numfor Solange Ayuni","doi":"10.37934/mjcsm.5.1.2130","DOIUrl":"https://doi.org/10.37934/mjcsm.5.1.2130","url":null,"abstract":"Implementation of supplier development (SD) is appropriate for a firm that intends to reduce costs and streamline its operations while minimising defective products. However, the number of practices involved in the SD program is too large, making them difficult to manage. Conventionally, the selection of decisions is based on multicriteria and is often complex and unstructured. Thus, this paper proposed the Analytic Hierarchy Process (AHP) and Fuzzy Analytic Hierarchy Process (FAHP) methodologies to evaluate and select SD practices. Both methods produced the same result. The results obtained can be indicated by the production professionals as guidelines to look for the opportunity to implement the SD program to improve the capabilities of their suppliers.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123986269","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}
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