Pub Date : 2021-06-15DOI: 10.5545/SV-JME.2020.7179
R. Đokić, J. Vladić, M. Kljajin, V. Jovanović, G. Marković, Mirko Karakasic
Modelling the dynamic behaviour of elevators with high lifting velocities (contemporary elevators in building construction and mine elevators) is a complex task and an important step in the design process and creating conditions for safe and reliable exploitation of these machines. Due to high heights and lifting velocities, the standard procedures for dynamic exploitation are not adequate. The study presents the method of forming a dynamic model to analyse nonstationary vibrations of a rope with time-varying length with nonholonomic boundary conditions in the position where the rope is connected with the cabin (cage) and in the upcoming point of its winding onto the pulley (drum). A unique method was applied to identify the basic parameters of the dynamic model (stiffness and damping) based on experimental measures for a concrete elevator. Due to the verification of this procedure, the experiment was conducted on a mine elevator in RTB Bor, Serbia. Using the obtained computer-experimental results, the simulations of the dynamic behaviour of an empty and loaded cage were shown. In addition, the study shows the specific method as the basis for forming a control program that would enable the decrease in vertical vibrations during an elevator starting and braking mode.
{"title":"Dynamic Modelling, Experimental Identification and Computer Simulations of Non-Stationary Vibration in High-Speed Elevators","authors":"R. Đokić, J. Vladić, M. Kljajin, V. Jovanović, G. Marković, Mirko Karakasic","doi":"10.5545/SV-JME.2020.7179","DOIUrl":"https://doi.org/10.5545/SV-JME.2020.7179","url":null,"abstract":"Modelling the dynamic behaviour of elevators with high lifting velocities (contemporary elevators in building construction and mine elevators) is a complex task and an important step in the design process and creating conditions for safe and reliable exploitation of these machines. Due to high heights and lifting velocities, the standard procedures for dynamic exploitation are not adequate. The study presents the method of forming a dynamic model to analyse nonstationary vibrations of a rope with time-varying length with nonholonomic boundary conditions in the position where the rope is connected with the cabin (cage) and in the upcoming point of its winding onto the pulley (drum). A unique method was applied to identify the basic parameters of the dynamic model (stiffness and damping) based on experimental measures for a concrete elevator. Due to the verification of this procedure, the experiment was conducted on a mine elevator in RTB Bor, Serbia. Using the obtained computer-experimental results, the simulations of the dynamic behaviour of an empty and loaded cage were shown. In addition, the study shows the specific method as the basis for forming a control program that would enable the decrease in vertical vibrations during an elevator starting and braking mode.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82741143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-15DOI: 10.5545/SV-JME.2021.7104A
Gautham Velayudhan, P. Venugopal, Ebron Shaji Gnanasigamony Thankareathenam, M. Selvakumar, Thyla Pudukarai Ramaswamy
The roof slab of the nuclear reactor supports all the components and sub-systems. Roof slab needs to resist the seismic loads in accordance with load-carrying criteria. The static stress analysis of the reactor roof slab reveals that high-stress concentration was present in the pump penetration shell (PPS) which supports the primary sodium pump. This paper presents the assessment of collapse load and optimization of pump penetration shell, through the reliability approach, accounting for material nonlinearity, geometrical nonlinearity and randomness in loading. In addition to that, the load-carrying capacity of PPS was determined considering two different materials, viz., IS2062 and A48P2. The design of experiments (DoE) was formulated considering the flange angle and flange thickness as parameters. An empirical model for load function was formulated from the results of the collapse load obtained for various combinations of design parameters. The above function was used to perform the reliability-based geometry optimization of PPS of the roof slab.
{"title":"Reliability-Based Design Optimization of Pump Penetration Shell Accounting for Material and Geometric Non-Linearity","authors":"Gautham Velayudhan, P. Venugopal, Ebron Shaji Gnanasigamony Thankareathenam, M. Selvakumar, Thyla Pudukarai Ramaswamy","doi":"10.5545/SV-JME.2021.7104A","DOIUrl":"https://doi.org/10.5545/SV-JME.2021.7104A","url":null,"abstract":"The roof slab of the nuclear reactor supports all the components and sub-systems. Roof slab needs to resist the seismic loads in accordance with load-carrying criteria. The static stress analysis of the reactor roof slab reveals that high-stress concentration was present in the pump penetration shell (PPS) which supports the primary sodium pump. This paper presents the assessment of collapse load and optimization of pump penetration shell, through the reliability approach, accounting for material nonlinearity, geometrical nonlinearity and randomness in loading. In addition to that, the load-carrying capacity of PPS was determined considering two different materials, viz., IS2062 and A48P2. The design of experiments (DoE) was formulated considering the flange angle and flange thickness as parameters. An empirical model for load function was formulated from the results of the collapse load obtained for various combinations of design parameters. The above function was used to perform the reliability-based geometry optimization of PPS of the roof slab.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88220581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-26DOI: 10.5545/SV-JME.2021.7111
Andraž Maček, J. Urevc, M. Halilovič
In the paper, an alignment methodology of finite element and full-field measurement data of planar specimens is presented. The alignment procedure represents an essential part of modern material response characterisation using heterogeneous strain-field specimens. The methodology addresses both the specimen recognition from a measurement’s image and the alignment procedure and is designed to be applied on a single measurement system. This is essential for its practical application because both processes, shape recognition and alignment, must be performed only after the specimen is fully prepared for the digital image correlation (DIC) measurements (white background and black speckles) and placed into a testing machine. The specimen can be observed with a single camera or with a multicamera system. The robustness of the alignment method is presented on a treatment of a specimen with a metamaterial-like structure and compared with the well-known iterative closest point (ICP) algorithm. The performance of the methodology is also demonstrated on a real DIC application.
{"title":"Flat Specimen Shape Recognition Based on Full-Field Optical Measurements and Registration Using Mapping Error Minimization Method","authors":"Andraž Maček, J. Urevc, M. Halilovič","doi":"10.5545/SV-JME.2021.7111","DOIUrl":"https://doi.org/10.5545/SV-JME.2021.7111","url":null,"abstract":"In the paper, an alignment methodology of finite element and full-field measurement data of planar specimens is presented. The alignment procedure represents an essential part of modern material response characterisation using heterogeneous strain-field specimens. The methodology addresses both the specimen recognition from a measurement’s image and the alignment procedure and is designed to be applied on a single measurement system. This is essential for its practical application because both processes, shape recognition and alignment, must be performed only after the specimen is fully prepared for the digital image correlation (DIC) measurements (white background and black speckles) and placed into a testing machine. The specimen can be observed with a single camera or with a multicamera system. The robustness of the alignment method is presented on a treatment of a specimen with a metamaterial-like structure and compared with the well-known iterative closest point (ICP) algorithm. The performance of the methodology is also demonstrated on a real DIC application.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88591387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-26DOI: 10.5545/SV-JME.2021.7101
A. Tyagi, Q. Murtaza, R. S. Walia
Residual, Corrosion & Tribological Behavior of HVOF Sprayed Sustainable Temperature-Dependent Carbon-Based Hybrid Composite Coating Tyagi, A. – Murtaza, Q. – Walia, R.S. Ankit Tyagi1,2,* – Qasim Murtaza1 – Ravinderjit Singh Walia3 1 Delhi Technological University, Department of Mechanical Engineering, India 2 SGT University, Department of Mechanical Engineering, India 3 Punjab Engineering College, Department of Production & Industrial engineering, India
Pub Date : 2021-04-26DOI: 10.5545/SV-JME.2021.7141
A. A. Hussien, I. Qasem, P. Kataraki, W. Al-Kouz, Ayub Ahmed Janvekar
Studying the Performance of Cutting Carbon Fibre-Reinforced Plastic Using an Abrasive Water Jet Technique Hussien, A.A. – Qasem, I. – Kataraki, P.S. – Al-Kouz, W. – Janvekar, A.A. Ahmed A. Hussien1,* – Isam Qasem1 – Pramodkumar S. Kataraki2 – Wael Al-Kouz3 – Ayub Ahmed Janvekar4 1 Al-Balqa Applied University, Al-Huson University College, Department of Mechanical Engineering, Jordan 2 REVA University, School of Mechanical Engineering, India 3 German Jordanian University, Department of Mechanical and Maintenance Engineering, Jordan 4 VIT University, School of Mechanical Engineering, India
磨料水射流切割碳纤维增强塑料性能研究Hussien, A.A. - Qasem, I. - Kataraki, P.S. - Al-Kouz, W. - Janvekar, A.A. Ahmed A. Hussien1，* - Isam Qasem1 - Pramodkumar S. Kataraki2 - Wael Al-Kouz3 - Ayub Ahmed Janvekar4 1 Al-Balqa应用大学，Al-Huson大学学院，机械工程系，约旦2 REVA大学，机械工程学院，印度3德国约旦大学，约旦理工大学机械工程学院机械与维修工程系，印度
{"title":"Studying the Performance of Cutting Carbon Fibre-Reinforced Plastic Using an Abrasive Water Jet Technique","authors":"A. A. Hussien, I. Qasem, P. Kataraki, W. Al-Kouz, Ayub Ahmed Janvekar","doi":"10.5545/SV-JME.2021.7141","DOIUrl":"https://doi.org/10.5545/SV-JME.2021.7141","url":null,"abstract":"Studying the Performance of Cutting Carbon Fibre-Reinforced Plastic Using an Abrasive Water Jet Technique Hussien, A.A. – Qasem, I. – Kataraki, P.S. – Al-Kouz, W. – Janvekar, A.A. Ahmed A. Hussien1,* – Isam Qasem1 – Pramodkumar S. Kataraki2 – Wael Al-Kouz3 – Ayub Ahmed Janvekar4 1 Al-Balqa Applied University, Al-Huson University College, Department of Mechanical Engineering, Jordan 2 REVA University, School of Mechanical Engineering, India 3 German Jordanian University, Department of Mechanical and Maintenance Engineering, Jordan 4 VIT University, School of Mechanical Engineering, India","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78399984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-26DOI: 10.5545/SV-JME.2021.7106
T. Nguyen, Minh-Thai Le
Improving the surface quality after burnishing operation has been the subject of various published investigations. Unfortunately, the trade-off analysis between the energy consumption and surface characteristics of the internal burnishing has been not addressed due to the expensive cost and huge efforts required. The objective of the present work is to optimize burnishing factors, including the spindle speed, burnishing feed, depth of penetration, and the number of rollers for minimizing the energy consumed in the burnishing time, as well as surface roughness and maximizing Rockwell hardness. An adaptive neuro-based-fuzzy inference system (ANFIS) was used to develop burnishing objectives in terms of machining parameters. The optimization outcomes were selected using an evolution algorithm, specifically the non-dominated sorting particle swarm optimization (NSPSO). The results of the proposed ANFIS models are significant and can be employed to predict response values in industrial applications. The optimization technique comprising the ANFIS and NOPSO is a powerful approach to model burnishing performances and select optimal parameters as compared to the trial and error method as well as operator experience. Finally, the optimal solution can help to achieve the improvements in the energy consumed by 16.3 %, surface roughness by 24.3 %, and Rockwell hardness by 4.0 %, as compared to the common values
{"title":"Optimization of the Internal Roller Burnishing Process for Energy Reduction and Surface Properties","authors":"T. Nguyen, Minh-Thai Le","doi":"10.5545/SV-JME.2021.7106","DOIUrl":"https://doi.org/10.5545/SV-JME.2021.7106","url":null,"abstract":"Improving the surface quality after burnishing operation has been the subject of various published investigations. Unfortunately, the trade-off analysis between the energy consumption and surface characteristics of the internal burnishing has been not addressed due to the expensive cost and huge efforts required. The objective of the present work is to optimize burnishing factors, including the spindle speed, burnishing feed, depth of penetration, and the number of rollers for minimizing the energy consumed in the burnishing time, as well as surface roughness and maximizing Rockwell hardness. An adaptive neuro-based-fuzzy inference system (ANFIS) was used to develop burnishing objectives in terms of machining parameters. The optimization outcomes were selected using an evolution algorithm, specifically the non-dominated sorting particle swarm optimization (NSPSO). The results of the proposed ANFIS models are significant and can be employed to predict response values in industrial applications. The optimization technique comprising the ANFIS and NOPSO is a powerful approach to model burnishing performances and select optimal parameters as compared to the trial and error method as well as operator experience. Finally, the optimal solution can help to achieve the improvements in the energy consumed by 16.3 %, surface roughness by 24.3 %, and Rockwell hardness by 4.0 %, as compared to the common values","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72429444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-26DOI: 10.5545/SV-JME.2021.7124
Hao Liu, Zhoupeng Liu, S. Hao
*Corr. Author’s Address: Nanjing University of Aeronautics and Astronautics, 054 Department, No.29 Yudao Street, Nanjing, China, liuhao-01@nuaa.edu.cn, liuzhoupenga@nuaa.edu.cn 180 Design of a Throat-extended FDM Extruder for Multi-axis 3D Printing Liu, H. – Liu, Z. – Siting Hao, S. Hao Liu1* – Zhoupeng Liu1,* – Siting Hao2 1 Nanjing University of Aeronautics and Astronautics, College of Mechanical and Electrical Engineering, China 2 Tianjin University, College of Mechanical Engineering, China
{"title":"Design of a Throat-extended FDM Extruder for Multi-axis 3D Printing","authors":"Hao Liu, Zhoupeng Liu, S. Hao","doi":"10.5545/SV-JME.2021.7124","DOIUrl":"https://doi.org/10.5545/SV-JME.2021.7124","url":null,"abstract":"*Corr. Author’s Address: Nanjing University of Aeronautics and Astronautics, 054 Department, No.29 Yudao Street, Nanjing, China, liuhao-01@nuaa.edu.cn, liuzhoupenga@nuaa.edu.cn 180 Design of a Throat-extended FDM Extruder for Multi-axis 3D Printing Liu, H. – Liu, Z. – Siting Hao, S. Hao Liu1* – Zhoupeng Liu1,* – Siting Hao2 1 Nanjing University of Aeronautics and Astronautics, College of Mechanical and Electrical Engineering, China 2 Tianjin University, College of Mechanical Engineering, China","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90471539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-26DOI: 10.5545/SV-JME.2020.7017
A. Taghavipour, A. Alipour
One of the most important challenges facing automotive engineers is reducing vehicle fuel consumption and improving the drivability index. Modern hybrid electric powertrains play an important role in reducing fuel consumption. Continuously variable transmission (CVT) is an automatic transmission that can change the gear ratio seamlessly using a belt and pulleys. CVT performs with infinite gear ratios. Controlling and determining the optimal gear ratio, especially in a complex hybrid powertrain, is a major challenge. Therefore, a multi-parametric model predictive controller with real-time implementation capability is proposed that can handle the energy management task concurrently with gear shifting strategy in a parallel pre-transmission hybrid electric vehicle. The proposed controller hardware-in-the-loop (HIL) validation procedure on the high-fidelity Autonomie model shows significant improvement in fuel economy while maintaining drivability in three different driving schedules. HIL evaluation guarantees the real-time capability and the proposed controller readiness to be implemented to real-world control hardware.
{"title":"HIL Evaluation of a Novel Real-time Energy Management System for an HEV with a Continuously Variable Transmission","authors":"A. Taghavipour, A. Alipour","doi":"10.5545/SV-JME.2020.7017","DOIUrl":"https://doi.org/10.5545/SV-JME.2020.7017","url":null,"abstract":"One of the most important challenges facing automotive engineers is reducing vehicle fuel consumption and improving the drivability index. Modern hybrid electric powertrains play an important role in reducing fuel consumption. Continuously variable transmission (CVT) is an automatic transmission that can change the gear ratio seamlessly using a belt and pulleys. CVT performs with infinite gear ratios. Controlling and determining the optimal gear ratio, especially in a complex hybrid powertrain, is a major challenge. Therefore, a multi-parametric model predictive controller with real-time implementation capability is proposed that can handle the energy management task concurrently with gear shifting strategy in a parallel pre-transmission hybrid electric vehicle. The proposed controller hardware-in-the-loop (HIL) validation procedure on the high-fidelity Autonomie model shows significant improvement in fuel economy while maintaining drivability in three different driving schedules. HIL evaluation guarantees the real-time capability and the proposed controller readiness to be implemented to real-world control hardware.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87140464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-26DOI: 10.5545/SV-JME.2020.7068
Zhou Haichao, Huiyun Li, Yang Jian, Chen Qingyun, Guolin Wang, Han Tong, Jieyu Ren, Te Ma
A Strain-Based Method to Estimate Longitudinal Force for Intelligent Tires by Using a Physics-Based Model Zhou, H.C. – Li, H.Y. – Yang, J. – Chen, Q.Y. – Wang, G.L. – Han, T. – Ren, J.Y. – Ma, T. Haichao Zhou1 – Huiyun Li1 – Jian Yang1,* – Qingyun Chen1 – Guolin Wang1 – Tong Han1 – Jieyu Ren2 – Te Ma1 1Jiangsu University, School of Automotive and Traffic Engineering, China 2Zhejiang Wanxiang Marelli Shock Absorbers, China
{"title":"A Strain-Based Method to Estimate Longitudinal Force for Intelligent Tires by Using a Physics-Based Model","authors":"Zhou Haichao, Huiyun Li, Yang Jian, Chen Qingyun, Guolin Wang, Han Tong, Jieyu Ren, Te Ma","doi":"10.5545/SV-JME.2020.7068","DOIUrl":"https://doi.org/10.5545/SV-JME.2020.7068","url":null,"abstract":"A Strain-Based Method to Estimate Longitudinal Force for Intelligent Tires by Using a Physics-Based Model Zhou, H.C. – Li, H.Y. – Yang, J. – Chen, Q.Y. – Wang, G.L. – Han, T. – Ren, J.Y. – Ma, T. Haichao Zhou1 – Huiyun Li1 – Jian Yang1,* – Qingyun Chen1 – Guolin Wang1 – Tong Han1 – Jieyu Ren2 – Te Ma1 1Jiangsu University, School of Automotive and Traffic Engineering, China 2Zhejiang Wanxiang Marelli Shock Absorbers, China","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87745407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-22DOI: 10.5545/SV-JME.2020.6936
Sandino Torres, Roberto Ortega, P. Acosta, Edisson Caldeŕon
The use of biodegradable materials has a growing field of application due to environmental concerns, however, scientific research on incremental forming using biomaterials is scarce. Thus, this study focuses on the single point incremental forming (SPIF) process applied to a composite sheet that combines a biodegradable thermoplastic matrix (Solanyl) reinforced with natural fibres (flax). The influence of the process parameters on the final geometry is determined, evaluating the effect of the following factors: step depth, wall angle and temperature reached during the process. Additionally, a heated aqueous medium is incorporated which facilitates the formability of the composite sheets. This method is especially useful for materials that have poor formability at room temperature. The benefits of using controlled heat include the reduction of formation forces applied to the plate, improved accuracy due to the reduction of elastic recovery, and the manipulation of the samples remarkably close to the glass transition temperatures. Through this experimental study with the variables analysed, a maximum shaping depth of 310 mm is obtained. These results confirm that the single point shaping used with bioplastic materials is possible and has positive outcomes for incremental forming.
{"title":"Hot Incremental Forming of Biocomposites Developed from Linen Fibres and a Thermoplastic Matrix","authors":"Sandino Torres, Roberto Ortega, P. Acosta, Edisson Caldeŕon","doi":"10.5545/SV-JME.2020.6936","DOIUrl":"https://doi.org/10.5545/SV-JME.2020.6936","url":null,"abstract":"The use of biodegradable materials has a growing field of application due to environmental concerns, however, scientific research on incremental forming using biomaterials is scarce. Thus, this study focuses on the single point incremental forming (SPIF) process applied to a composite sheet that combines a biodegradable thermoplastic matrix (Solanyl) reinforced with natural fibres (flax). The influence of the process parameters on the final geometry is determined, evaluating the effect of the following factors: step depth, wall angle and temperature reached during the process. Additionally, a heated aqueous medium is incorporated which facilitates the formability of the composite sheets. This method is especially useful for materials that have poor formability at room temperature. The benefits of using controlled heat include the reduction of formation forces applied to the plate, improved accuracy due to the reduction of elastic recovery, and the manipulation of the samples remarkably close to the glass transition temperatures. Through this experimental study with the variables analysed, a maximum shaping depth of 310 mm is obtained. These results confirm that the single point shaping used with bioplastic materials is possible and has positive outcomes for incremental forming.","PeriodicalId":49472,"journal":{"name":"Strojniski Vestnik-Journal of Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85627411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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