Experimental and numerical study of the elastic properties of PMI foams |
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| Authors: | Jie Wang Hai Wang Xiuhua Chen and Yin Yu |
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| Affiliation: | (1) School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, No.800 Dongchuan Rd., Shanghai, 200240, People’s Republic of China;(2) School of Aeronautics and Astronautics, Shanghai Jiao Tong University, No.800 Dongchuan Rd., Shanghai, 200240, People’s Republic of China |
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| Abstract: | The elastic properties of polymethacrylimide (PMI) foams were investigated experimentally and numerically. Standard tests
were carried to measure the mechanical properties of ROHACELL? WF and RIST grades foams. The tetrakaidekahedral unit cell was adopted to generate a 3D representative volume element (RVE)
for the microstructure of PMI foams. It is assumed that the RVE represents the foam within the framework of elasticity. The
RVE models thus created were analyzed with periodic boundary conditions to obtain the elastic properties of PMI foams by using
finite element analysis (FEA). The numerical results were compared with the experimental data and the prediction of existing
theoretical models, and the proposed model was found to give the best prediction for the effective modulus of PMI foams. Parameter
studies were also carried out using the RVE models to investigate the effect of the foam cell size and cell thickness on the
effective modulus of PMI foams. |
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