Characterization of nonlinear response in quasi-unidirectional E-glass fabric reinforced polypropylene composites under off-axis tensile loading |
| |
| Institution: | 1. Friedrich-Alexander-University Erlangen-Nürnberg, Institute of Polymer Technology, Am Weichselgarten 9, D-91058 Erlangen, Germany;2. Central South University, State Key Laboratory of High Performance and Complex Manufacturing, Lushan South Road 932, 410083 Changsha, China;1. Center for Advanced Materials, Qatar University, Doha 2713, Qatar;2. Materials Science and Technology Program, College of Arts and Sciences, Qatar University, Doha 2713, Qatar;3. Qatar Petrochemical Company (QAPCO), Doha 756, Qatar;1. Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu, 212013, China;2. Beijing Institute of Aeronautical Materials, Beijing, 100095, China;1. Centre Català del Plàstic, Departament de Ciència dels Materials i Enginyeria Metal-lúrgica, Universitat Politècnica de Catalunya, BarcelonaTech, C/Colom 114, 08222 Terrassa, Spain;2. NUDEC SA, C/ Pintor Vila Cinca, 24-28, Pol. Ind. Can Humet de Dalt, 08213 Polinyà, Spain;1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People''s Republic of China;2. University of Chinese Academy of Sciences, Beijing 100049, People''s Republic of China;3. Department of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, People''s Republic of China;1. Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, PR China;2. Engineering Research Center of Elastomer Materials Energy Conservation and Resources, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, PR China;3. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing University of Chemical Technology, Beijing 100029, PR China;4. Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China |
| |
| Abstract: | The present paper addressed the nonlinear stress-strain response in quasi-unidirectional E-glass fabric reinforced polypropylene composites under off-axis tensile loading. A series of monotonic and cyclic loading-unloading tensile tests were carried out. Both irreversible strains and stiffness degradation were observed in cyclic loading-unloading tests, which indicate that the nonlinear response of composites was induced by a combination of damage and plasticity. A coupled damage-plasticity model was employed to describe the nonlinear off-axis tensile stress-strain relation of materials. In this model, a plastic potential function together with associated plastic flow rule were adopted to assess the evolution of plastic strains. The damage variables in forms of stiffness degradation were expressed as a Weibull function of the effective stress. A full suite of model parameters was experimentally determined from cyclic loading-unloading tensile tests. The stress-strain curves predicted by this model agreed well with experimental results. |
| |
| Keywords: | Quasi-unidirectional composites Nonlinear Plasticity Damage |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
