Pub Date : 2004-12-01DOI: 10.1177/0731684404041140
A. Aktaş
In this study, an elastic–plastic analysis and expansion of plastic region are carried out on symmetric and antisymmetric metal–matrix laminated plates with an elliptical hole. The plates are assumed to be clamped and subjected to transversely distributed loads. Loading is gradually increased from the yield point of the plate by 0.0001 MPa at each load step. Load step numbers are chosen as 300, 400, and 500. Residual stress components and the propagation of the plastic region are obtained for small deformations on the upper and lower surface using finite element method (FEM) and including first-order shear deformation theory.
{"title":"Elastic–Plastic Stress Analysis and Plastic Region Expansion of Clamped Aluminum Metal–Matrix Laminated Plates with an Elliptical Hole","authors":"A. Aktaş","doi":"10.1177/0731684404041140","DOIUrl":"https://doi.org/10.1177/0731684404041140","url":null,"abstract":"In this study, an elastic–plastic analysis and expansion of plastic region are carried out on symmetric and antisymmetric metal–matrix laminated plates with an elliptical hole. The plates are assumed to be clamped and subjected to transversely distributed loads. Loading is gradually increased from the yield point of the plate by 0.0001 MPa at each load step. Load step numbers are chosen as 300, 400, and 500. Residual stress components and the propagation of the plastic region are obtained for small deformations on the upper and lower surface using finite element method (FEM) and including first-order shear deformation theory.","PeriodicalId":16971,"journal":{"name":"Journal of Reinforced Plastics & Composites","volume":"21 1","pages":"1997 - 2009"},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83820480","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}
Pub Date : 2004-12-01DOI: 10.1177/0731684404041139
K. Pickering, C. Ji
The effects of poly[methylene (polyphenyl isocyanate)] (PMPPIC) and maleated polypropylene (MAPP) coupling agents, separately and combined, on the strength and Young’s modulus of New Zealand radiata pine-reinforced polypropylene (PP) composites were assessed. A modest improvement compared to the unreinforced matrix strength of 4% and much greater improvement of 123%, substantially greater than reported elsewhere in the literature, were obtained using PMPPIC and MAPP respectively. Young’s modulus improvements compared to the unreinforced matrix of 77 and 177% were obtained using PMPPIC and MAPP respectively. The MAPP coupling agents with the longest chain lengths and lower functionality gave the greatest benefit, supporting chain entanglement as the major mechanism for enhanced bonding with PP. Relatively high moulding temperatures and low injection pressures, bringing about enhancement of fiber orientation in the test direction, also appear to have contributed to such large improvements in composite properties in the current work. Combination of PMPPIC and MAPP coupling agents produced mixed results: benefits were obtained by combining PMPPIC and MAPP with the longest chain lengths which can be explained by PMPPIC bonding with hydroxyl groups not accessible to further coupling with MAPP once saturation is achieved.
{"title":"The Effect of Poly[methylene(polyphenyl isocyanate)] and Maleated Polypropylene Coupling Agents on New Zealand Radiata Pine Fiber–Polypropylene Composites","authors":"K. Pickering, C. Ji","doi":"10.1177/0731684404041139","DOIUrl":"https://doi.org/10.1177/0731684404041139","url":null,"abstract":"The effects of poly[methylene (polyphenyl isocyanate)] (PMPPIC) and maleated polypropylene (MAPP) coupling agents, separately and combined, on the strength and Young’s modulus of New Zealand radiata pine-reinforced polypropylene (PP) composites were assessed. A modest improvement compared to the unreinforced matrix strength of 4% and much greater improvement of 123%, substantially greater than reported elsewhere in the literature, were obtained using PMPPIC and MAPP respectively. Young’s modulus improvements compared to the unreinforced matrix of 77 and 177% were obtained using PMPPIC and MAPP respectively. The MAPP coupling agents with the longest chain lengths and lower functionality gave the greatest benefit, supporting chain entanglement as the major mechanism for enhanced bonding with PP. Relatively high moulding temperatures and low injection pressures, bringing about enhancement of fiber orientation in the test direction, also appear to have contributed to such large improvements in composite properties in the current work. Combination of PMPPIC and MAPP coupling agents produced mixed results: benefits were obtained by combining PMPPIC and MAPP with the longest chain lengths which can be explained by PMPPIC bonding with hydroxyl groups not accessible to further coupling with MAPP once saturation is achieved.","PeriodicalId":16971,"journal":{"name":"Journal of Reinforced Plastics & Composites","volume":"31 1","pages":"2011 - 2024"},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83704041","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}
Pub Date : 2004-12-01DOI: 10.1177/0731684404041714
H. Yeh, R. Berryhill, H. Yeh
The purpose of this study was to investigate the significance of damage zone size as a parameter for evaluating the fracture strength of center-cracked laminated composites. Using experimental data for a symmetrical, generally orthotropic graphite-epoxy laminate, the damage zone sizes predicted by the Average Stress Criterion and Point Stress Criterion, as well as the D-Criterion, were compared. Additionally, limited data for the Quadratic Surfaces and Sequential Fiber Failure Criteria were evaluated. Experimental measurements of crack-tip damage zone size were used to establish a physical reference point by which all of the theories were compared. The preliminary results of this study indicate that the characteristic lengths defined by the Quadratic Surfaces and Sequential Fiber Failure Criteria are not representative of the measured damage zone size and need further investigation.
{"title":"Analytical Damage Zone Size Predictions for Notched Laminated Composites","authors":"H. Yeh, R. Berryhill, H. Yeh","doi":"10.1177/0731684404041714","DOIUrl":"https://doi.org/10.1177/0731684404041714","url":null,"abstract":"The purpose of this study was to investigate the significance of damage zone size as a parameter for evaluating the fracture strength of center-cracked laminated composites. Using experimental data for a symmetrical, generally orthotropic graphite-epoxy laminate, the damage zone sizes predicted by the Average Stress Criterion and Point Stress Criterion, as well as the D-Criterion, were compared. Additionally, limited data for the Quadratic Surfaces and Sequential Fiber Failure Criteria were evaluated. Experimental measurements of crack-tip damage zone size were used to establish a physical reference point by which all of the theories were compared. The preliminary results of this study indicate that the characteristic lengths defined by the Quadratic Surfaces and Sequential Fiber Failure Criteria are not representative of the measured damage zone size and need further investigation.","PeriodicalId":16971,"journal":{"name":"Journal of Reinforced Plastics & Composites","volume":"11 1","pages":"2081 - 2100"},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88933291","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}
Pub Date : 2004-12-01DOI: 10.1177/073168440402301807
M. Duranay
Ahmad, Z., F. Al-Sulaiman and B. J. A. Aleem, Corrosion Behavior of Carbon Reinforced Plain-weave Laminates, 23 (10), 1041. Akkaoui, W. and G. Bayram, Effects of Processing Parameters on Mechanical and Thermal Properties of Glass Mat Reinforced Nylon 6 Composites, 23 (8), 881. Aktas , A., Elastic–Plastic Stress Analysis and Plastic Region Expansion of Clamped Aluminum Metal–Matrix Laminated Plates with an Elliptical Hole, 23 (18), 1997. Arslan, N., M. O. Kaman and M. Duranay, Elastic–Plastic Stress Analysis in Aluminum Metal–Matrix Composite-laminated Plates ([0 / ]2) Under Transverse Uniformly Distributed Load, 23 (18), 2025. Ataberk, N., M. Uyaner, A. Avci and S. Koçak, Elasto-plastic Stress Analysis of Aluminum Metal–Matrix Composite Plate Under In-plane Loading, 23 (5), 563. Béchet, E., E. Ruiz, F. Trochu and J.-C. Cuilliere, Re-meshing Algorithms Applied to Mould Filling Simulations in Resin Transfer Moulding, 23 (1), 17. Bates, P. and I. Ekhator, Continuous Consolidation of Commingled Glass and Polypropylene Roving, 23 (13), 1409. Baucom, J. N., M. A. Zikry and Y. Qiu, Dynamic and Quasi-static Failure Evolution of 3D Woven Cellular Composite Systems, 23 (5), 471. Çallioğlu, H., S. Aksoy, O. Sayman and H. Yildiz, An Elastic–Plastic and Residual Stress Analysis of Symmetric Laminated Cantilever Beam Under A Bending Moment, 23 (2), 195. Çallioğlu, H., Stress Analysis of an Orthotropic Rotating Disc under Thermal Loading, 23 (17), 1859. Chandrasekaran, E., K. Jayaraman and S. M. Nazeer, Effects of Symmetric and Antisymmetric Fiber Orientations on the Natural Frequencies of FRP Aircraft Panel Boards, 23 (8), 831. Chang, C.-Y., L.-W. Hourng and C.-S. Yu, Analysis of Flow Phenomena during the Filling Stage of CTM, 23 (14), 1561. Chen, G., X. Cheng, Z. Li and C. Kou,Hygrothermal Properties of Stitched and Unstitched Uniweave T300/QY9512 Laminates (With a Hole), 23 (15), 1663. Chen, G., Z. Li, C. Kou and L. Gui, Finite Element Analysis of Low-velocity Impact Damage of Stitched Laminates, 23 (9), 987. Chen, S.-C., M.-C. Lin, R. D. Chien, M.-Y. Teng and C.-S. Chen, Surface Visual Quality of Gas-assisted Injection Molded ABS Parts with Various Gas Channel Designs, 23 (10), 1115. Chien, R. D., S.-C. Chen, P.-H. Lee and J.-S. Huang, Study on the Molding Characteristics and Mechanical Properties of Injection-molded Foaming Polypropylene Parts, 23 (4), 429. Chien, R.-D., N.-T. Cheng and S.-C. Chen, Study of the Bending Properties in Gas-assisted Injection Molded Fiber-reinforced Nylon Parts, 23 (16), 1779.
张建军，张建军，张建军，张建军。复合材料复合材料的腐蚀行为研究，材料导刊，23(10)，1041。杨建军，杨建军，杨建军，玻璃毡增强尼龙6复合材料力学性能的研究，材料导报，23(8)，881。A.，椭圆孔夹紧铝基层合板的弹塑性应力分析和塑性区扩展，23(18)，1997。张建军，张建军，张建军，等。铝基复合材料层合板的弹性-塑性应力分析[j] .材料工程，23(1)，2015。李建军，李建军，李建军，A. Avci, S. koak，铝基复合材料板的面内载荷弹塑性应力分析，力学学报，23(5)，563。bacimchet, E. Ruiz, F. Trochu和j . c .。Cuilliere，树脂传递模压充型模拟的重网格算法，23(1)，17。李晓东，李晓东，李晓东，玻璃和聚丙烯混合粗纱的连续固结，机械工程学报，23(3)，1409。鲍康，刘建军，邱勇，三维编织蜂窝复合材料系统的动态和准静态破坏演化，机械工程学报，23(5)，471。[2]胡建军，胡建军，胡建军，梁振华，梁振华，梁振华，梁振华，梁振华，梁振华，梁振华，梁振华，梁振华，梁振华，梁振华。Çallioğlu, H.，热载荷下正交各向异性旋转盘的应力分析，23(17)，1859。钱德龙，李建军，李建军，纤维取向对玻璃钢飞机面板固有频率的影响，机械工程学报，23(8)，831。Chang彭译葶。, L.-W。小时和c - s。于，CTM充填阶段流动现象分析，23(14)，1561。陈光，程晓明，李志强，寇超，T300/QY9512复合材料(带孔)的湿热性能研究，23(15)，1663。陈国强，李志强，寇超，桂林，缝合层合板低速冲击损伤的有限元分析，机械工程学报，23(9)，987。陈,研究所。, M.-C。林，陈仁德，m - y。邓和c - s。陈，不同气路设计的ABS辅助注射成型零件的表面视觉质量，23(10)，1115。钱氏，r.d.， s.c c。陈,林志信。李和j - s。黄，注塑成型聚丙烯发泡件的成型特性及力学性能研究，23(4)，429。简,r。, N.-T。郑志刚和陈绍成。陈，气体辅助注射成型纤维增强尼龙件的弯曲性能研究，23(16)，1779。
{"title":"Index","authors":"M. Duranay","doi":"10.1177/073168440402301807","DOIUrl":"https://doi.org/10.1177/073168440402301807","url":null,"abstract":"Ahmad, Z., F. Al-Sulaiman and B. J. A. Aleem, Corrosion Behavior of Carbon Reinforced Plain-weave Laminates, 23 (10), 1041. Akkaoui, W. and G. Bayram, Effects of Processing Parameters on Mechanical and Thermal Properties of Glass Mat Reinforced Nylon 6 Composites, 23 (8), 881. Aktas , A., Elastic–Plastic Stress Analysis and Plastic Region Expansion of Clamped Aluminum Metal–Matrix Laminated Plates with an Elliptical Hole, 23 (18), 1997. Arslan, N., M. O. Kaman and M. Duranay, Elastic–Plastic Stress Analysis in Aluminum Metal–Matrix Composite-laminated Plates ([0 / ]2) Under Transverse Uniformly Distributed Load, 23 (18), 2025. Ataberk, N., M. Uyaner, A. Avci and S. Koçak, Elasto-plastic Stress Analysis of Aluminum Metal–Matrix Composite Plate Under In-plane Loading, 23 (5), 563. Béchet, E., E. Ruiz, F. Trochu and J.-C. Cuilliere, Re-meshing Algorithms Applied to Mould Filling Simulations in Resin Transfer Moulding, 23 (1), 17. Bates, P. and I. Ekhator, Continuous Consolidation of Commingled Glass and Polypropylene Roving, 23 (13), 1409. Baucom, J. N., M. A. Zikry and Y. Qiu, Dynamic and Quasi-static Failure Evolution of 3D Woven Cellular Composite Systems, 23 (5), 471. Çallioğlu, H., S. Aksoy, O. Sayman and H. Yildiz, An Elastic–Plastic and Residual Stress Analysis of Symmetric Laminated Cantilever Beam Under A Bending Moment, 23 (2), 195. Çallioğlu, H., Stress Analysis of an Orthotropic Rotating Disc under Thermal Loading, 23 (17), 1859. Chandrasekaran, E., K. Jayaraman and S. M. Nazeer, Effects of Symmetric and Antisymmetric Fiber Orientations on the Natural Frequencies of FRP Aircraft Panel Boards, 23 (8), 831. Chang, C.-Y., L.-W. Hourng and C.-S. Yu, Analysis of Flow Phenomena during the Filling Stage of CTM, 23 (14), 1561. Chen, G., X. Cheng, Z. Li and C. Kou,Hygrothermal Properties of Stitched and Unstitched Uniweave T300/QY9512 Laminates (With a Hole), 23 (15), 1663. Chen, G., Z. Li, C. Kou and L. Gui, Finite Element Analysis of Low-velocity Impact Damage of Stitched Laminates, 23 (9), 987. Chen, S.-C., M.-C. Lin, R. D. Chien, M.-Y. Teng and C.-S. Chen, Surface Visual Quality of Gas-assisted Injection Molded ABS Parts with Various Gas Channel Designs, 23 (10), 1115. Chien, R. D., S.-C. Chen, P.-H. Lee and J.-S. Huang, Study on the Molding Characteristics and Mechanical Properties of Injection-molded Foaming Polypropylene Parts, 23 (4), 429. Chien, R.-D., N.-T. Cheng and S.-C. Chen, Study of the Bending Properties in Gas-assisted Injection Molded Fiber-reinforced Nylon Parts, 23 (16), 1779.","PeriodicalId":16971,"journal":{"name":"Journal of Reinforced Plastics & Composites","volume":"133 1","pages":"2101 - 2107"},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77769425","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}
Pub Date : 2004-12-01DOI: 10.1177/0731684404041710
N. Arslan, M. O. Kaman, M. Duranay
In this paper, an elastic–plastic stress analysis is carried out in unidirectional reinforced steel–aluminum composite-laminated plates under transverse loading and simply supported conditions. For the elastic–plastic stress analysis, the mathematical formulation is given for small deformations. Finite Element Method and first-order shear deformation theory are used. A finite element computer program is developed for stress analysis. The laminated plates of constant thickness are manufactured by stacking four layers bonded symmetrically or antisymmetrically. The residual stress components and yield points are calculated for each layer and compared with different reinforced layers. The location and the expansion of the plastic zones are obtained according to loading gradually increased from yield point as 0.0001 MPa at each load step. The load capacity of the laminated plate increases by means of the residual stresses.
{"title":"Elastic–Plastic Stress Analysis in Aluminum Metal–Matrix Composite-laminated Plates ([0°/θ°]2) Under Transverse Uniformly Distributed Load","authors":"N. Arslan, M. O. Kaman, M. Duranay","doi":"10.1177/0731684404041710","DOIUrl":"https://doi.org/10.1177/0731684404041710","url":null,"abstract":"In this paper, an elastic–plastic stress analysis is carried out in unidirectional reinforced steel–aluminum composite-laminated plates under transverse loading and simply supported conditions. For the elastic–plastic stress analysis, the mathematical formulation is given for small deformations. Finite Element Method and first-order shear deformation theory are used. A finite element computer program is developed for stress analysis. The laminated plates of constant thickness are manufactured by stacking four layers bonded symmetrically or antisymmetrically. The residual stress components and yield points are calculated for each layer and compared with different reinforced layers. The location and the expansion of the plastic zones are obtained according to loading gradually increased from yield point as 0.0001 MPa at each load step. The load capacity of the laminated plate increases by means of the residual stresses.","PeriodicalId":16971,"journal":{"name":"Journal of Reinforced Plastics & Composites","volume":"70 1","pages":"2025 - 2045"},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77460282","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}
Pub Date : 2004-11-01DOI: 10.1177/0731684404041149
Y. Shen, H. W. Chien, Yi Lin
Microsystem technology is a compound technology including optic, mechanism, electricity, material, control and chemistry, etc. This technology can miniaturize products and increase their function, quality, trustworthiness and addendum. Micro-injection molding is a branch of the micro-electro mechanical system. The size of the product is in nanometers. It is important to produce the product for micro-injection molding technology today. The research of micro-injection molding is still in the early stages. In this study, numerical simulations of three-dimensional micro-injection moldings were performed. The governing differential equations were described by using control volume finite element method. The analysis with different polymers (such as PP, PC, PS, POM) and process parameters (injection time, mold temperature, injection temperature, injection pressure) are used to simulate the microgear for example. In order to obtain optimum results, the simulation introduces the Taguchi method and grey relational analysis to discuss the influence of each parameter in microinjection molding. The results show that the PS material is the most suitable material used in this study. The results for Mold Flow analysis and grey relational analysis are the same on this study.
{"title":"Optimization of the Micro-Injection Molding Process using Grey Relational Analysis and MoldFlow Analysis","authors":"Y. Shen, H. W. Chien, Yi Lin","doi":"10.1177/0731684404041149","DOIUrl":"https://doi.org/10.1177/0731684404041149","url":null,"abstract":"Microsystem technology is a compound technology including optic, mechanism, electricity, material, control and chemistry, etc. This technology can miniaturize products and increase their function, quality, trustworthiness and addendum. Micro-injection molding is a branch of the micro-electro mechanical system. The size of the product is in nanometers. It is important to produce the product for micro-injection molding technology today. The research of micro-injection molding is still in the early stages. In this study, numerical simulations of three-dimensional micro-injection moldings were performed. The governing differential equations were described by using control volume finite element method. The analysis with different polymers (such as PP, PC, PS, POM) and process parameters (injection time, mold temperature, injection temperature, injection pressure) are used to simulate the microgear for example. In order to obtain optimum results, the simulation introduces the Taguchi method and grey relational analysis to discuss the influence of each parameter in microinjection molding. The results show that the PS material is the most suitable material used in this study. The results for Mold Flow analysis and grey relational analysis are the same on this study.","PeriodicalId":16971,"journal":{"name":"Journal of Reinforced Plastics & Composites","volume":"51 1","pages":"1799 - 1814"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87847961","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}
Pub Date : 2004-11-01DOI: 10.1177/0731684404041142
H. Callioglu
In this study, a thermal stress analysis on a glass-fiber/epoxy orthotropic rotating hollow discs is investigated. A closed form solution is performed using polynomials under some considerations. The temperature distribution is chosen to vary parabolically from inner surface to outer surface along the radial sections. The distributions of the tangential and radial stress components are given in figures. When the temperature is increased further, the tangential stress component decreases at the inner surface, whereas increases at the outer surface, and radial stress component are reduced. The radial displacement is calculated analytically and has a higher value at the outer surface than at the inner surface.
{"title":"Stress Analysis of an Orthotropic Rotating Disc under Thermal Loading","authors":"H. Callioglu","doi":"10.1177/0731684404041142","DOIUrl":"https://doi.org/10.1177/0731684404041142","url":null,"abstract":"In this study, a thermal stress analysis on a glass-fiber/epoxy orthotropic rotating hollow discs is investigated. A closed form solution is performed using polynomials under some considerations. The temperature distribution is chosen to vary parabolically from inner surface to outer surface along the radial sections. The distributions of the tangential and radial stress components are given in figures. When the temperature is increased further, the tangential stress component decreases at the inner surface, whereas increases at the outer surface, and radial stress component are reduced. The radial displacement is calculated analytically and has a higher value at the outer surface than at the inner surface.","PeriodicalId":16971,"journal":{"name":"Journal of Reinforced Plastics & Composites","volume":"51 1","pages":"1859 - 1867"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78297950","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}
Pub Date : 2004-11-01DOI: 10.1177/0731684404041146
U. Esendemir
An analytical elasto-plastic stress analysis is carried out in a low-density polyethylenethermoplastic beam supported from two ends under transverse linearly distributed load reinforced by Cr–Ni steel fibers analytically. The material is assumed to be perfectly plastic for the elasto-plastic solution. The intensity of the uniform force is chosen at a small value; therefore, the normal stress component y is neglected in the elastic–plastic solution. The expansion of the plastic region and the residual stress component of σx and τxy are determined for 0, 30, 45, 60, and 90 orientation angles. The yielding begins at the upper and lower surfaces of the beam at the same distances from the ends. The intensity of residual stress component of x is maximum at the upper and lower surfaces but residual stress component of τxy is maximum on the x axis of the beam. The strength of the beam is increased by residual stresses.
{"title":"An Elasto-Plastic Stress Analysis in a Polymer–Matrix Composite Beam Supported from Two Ends under Transverse Linearly Distributed Load by Use of Anisotropic Elasticity Theory","authors":"U. Esendemir","doi":"10.1177/0731684404041146","DOIUrl":"https://doi.org/10.1177/0731684404041146","url":null,"abstract":"An analytical elasto-plastic stress analysis is carried out in a low-density polyethylenethermoplastic beam supported from two ends under transverse linearly distributed load reinforced by Cr–Ni steel fibers analytically. The material is assumed to be perfectly plastic for the elasto-plastic solution. The intensity of the uniform force is chosen at a small value; therefore, the normal stress component y is neglected in the elastic–plastic solution. The expansion of the plastic region and the residual stress component of σx and τxy are determined for 0, 30, 45, 60, and 90 orientation angles. The yielding begins at the upper and lower surfaces of the beam at the same distances from the ends. The intensity of residual stress component of x is maximum at the upper and lower surfaces but residual stress component of τxy is maximum on the x axis of the beam. The strength of the beam is increased by residual stresses.","PeriodicalId":16971,"journal":{"name":"Journal of Reinforced Plastics & Composites","volume":"35 4 Pt 2 1","pages":"1821 - 1832"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91239609","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}
Pub Date : 2004-11-01DOI: 10.1177/0731684404041715
J. Carey, A. Fahim, M. Munro
In a previous work, an analytical model based on Classical Laminate Plate Theory (CLPT) was developed to predict the braid elastic constants (Ex, Ey, Gxy and xy) of closed-mesh 2Dbraided fiber composite. In this work, the sensitivity of the braid elastic constants to composite constituent elastic constants was evaluated. The torsion of thin-walled tubes was used to experimentally obtain the braid shear modulus. The results predicted by the model are in good agreement with other models and with experimental results for Ex and Gxy of Kevlar 49 fiber-braided tubes with both rigid epoxy and elastomeric polyurethane resin matrices.
{"title":"Predicting Elastic Constants of 2D-Braided Fiber Rigid and Elastomeric–Polymeric Matrix Composites","authors":"J. Carey, A. Fahim, M. Munro","doi":"10.1177/0731684404041715","DOIUrl":"https://doi.org/10.1177/0731684404041715","url":null,"abstract":"In a previous work, an analytical model based on Classical Laminate Plate Theory (CLPT) was developed to predict the braid elastic constants (Ex, Ey, Gxy and xy) of closed-mesh 2Dbraided fiber composite. In this work, the sensitivity of the braid elastic constants to composite constituent elastic constants was evaluated. The torsion of thin-walled tubes was used to experimentally obtain the braid shear modulus. The results predicted by the model are in good agreement with other models and with experimental results for Ex and Gxy of Kevlar 49 fiber-braided tubes with both rigid epoxy and elastomeric polyurethane resin matrices.","PeriodicalId":16971,"journal":{"name":"Journal of Reinforced Plastics & Composites","volume":"27 1","pages":"1845 - 1857"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78632751","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}
Pub Date : 2004-11-01DOI: 10.1177/0731684404041145
X. Yao, Wei Xu, G. Jin, H. Yeh
The dynamic evolutions of stress singularities at mode I crack tip in laminate composites are studied by combining optical caustic with high-speed schardin camera. Theoretical caustics and initial curve for two different fiber laminate composites are simulated. Some characteristics of stress singularity at crack tip are analyzed. On the other hand, the generation and the subsequent evolution of dynamic failure around the crack tip are visualized by the optical shadow spots. The characteristic sizes of local stress concentration are extracted and the stress intensity factors at crack tip are determined. The local response and failure evolution mechanism of laminated composite after impact are analyzed by means of a series of optical caustic image and the deformation of composites.
{"title":"Low Velocity Impact Study of Laminate Composites with Mode I Crack Using Dynamic Optical Caustics","authors":"X. Yao, Wei Xu, G. Jin, H. Yeh","doi":"10.1177/0731684404041145","DOIUrl":"https://doi.org/10.1177/0731684404041145","url":null,"abstract":"The dynamic evolutions of stress singularities at mode I crack tip in laminate composites are studied by combining optical caustic with high-speed schardin camera. Theoretical caustics and initial curve for two different fiber laminate composites are simulated. Some characteristics of stress singularity at crack tip are analyzed. On the other hand, the generation and the subsequent evolution of dynamic failure around the crack tip are visualized by the optical shadow spots. The characteristic sizes of local stress concentration are extracted and the stress intensity factors at crack tip are determined. The local response and failure evolution mechanism of laminated composite after impact are analyzed by means of a series of optical caustic image and the deformation of composites.","PeriodicalId":16971,"journal":{"name":"Journal of Reinforced Plastics & Composites","volume":"18 1","pages":"1833 - 1844"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82494755","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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