Characterization of the compressive deformation behavior with strain rate effect of low-density polymeric foams |
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| Institution: | 1. Department of Precision Mechanics, Chuo University, 1-13-27 Kasuga, Bunkyo, Tokyo 112-8551, Japan;2. International Center for Applied Mechanics, SV Lab, School of Aerospace, Xi''an Jiaotong University, Xi''an 710049, China;3. Department of Earth and Environmental Engineering, Columbia University 500 W 120th Street, New York, NY 10027, USA;1. School of Mechanical Engineering, Vellore Institute of Technology, Vellore 632 014, India;2. Université Paris 13-CNRS, LSPM, UPR 3407, Villetaneuse F-93430, France;3. LEME, UPL, Univ. Paris Nanterre, 50 rue de Sevres, 92410 Ville d’Avray, France;1. Department of Precision Mechanics, Chuo University, 1-13-27 Kasuga, Bunkyo, Tokyo 112-8551, Japan;2. Department of Mechanical & Aerospace Engineering, Utah State University, 4130 Old Main Hill, Logan, UT 84322-4130, USA;1. Department of Mechanical Engineering, School of Science and Technology, Meiji University, 1-1-1, Higashimita, Tama-ku, Kawasaki-shi, Kanagawa 214-8551, Japan;2. Department of Mechanical Engineering Informatics, Graduate School of Science and Technology, Meiji University, 1-1-1, Higashimita, Tama-ku, Kawasaki-shi, Kanagawa 214-8551, Japan;3. Department of Mechanical Engineering Informatics, School of Science and Technology, Meiji University, 1-1-1, Higashimita, Tama-ku, Kawasaki-shi, Kanagawa 214-8551, Japan;1. Anglia Ruskin University, Bishop Hall Lane, Marconi 215, CM1 1SQ, UK;2. Department of Electronic & Electrical Engineering, University of Chester, Pool Lane, Chester CH2 4NU, UK |
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| Abstract: | This study investigates the compressive deformation behavior of a low-density polymeric foam at different strain rates. The material tested has micron-sized pores with a closed cell structure. The porosity is about 94%. During a uni-axial compressive test, the macroscopic stress–strain curve indicates a plateau region during plastic deformation. Finite Element Method (FEM) simulation was carried out, in which the yield criterion considered both components of Mises stress and hydrostatic stress. By using the present FEM and experimental data, we established a computational model for the plastic deformation behavior of porous material. To verify our model, several indentation experiments with different indenters (spherical indentation and wedge indentation) were carried out to generate various tri-axial stress states. From the series of experiments and computations, we observed good agreement between the experimental data and that generated by the computational model. In addition, the strain rate effect is examined for a more reliable prediction of plastic deformation. Therefore, the present computational model can predict the plastic deformation behavior (including time-dependent properties) of porous material subjected to uni-axial compression and indentation loadings. |
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| Keywords: | Porous material Compressive deformation behavior Strain rate Indentation Finite element method |
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