Numerical simulation and parameter identification of delamination failure for laminate
JI Qing-hui, ZHU Ping, LU Jia-hai
1. Research and Advanced Technology, SAIC Motor Corporation Limited, Shanghai 201804, China;
2. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China；
3. Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract The method of parameter identification for delamination failure criterion was proposed based on virtual crack closure technique (VCCT) in order to predict accurately delamination failure of fiber-reinforced composite laminate. The delamination fracture toughness of mode I and mode Ⅱ was obtained using quasi-static mechanical tests of double cantilever beam (DCB) and end notch flexure (ENF), respectively. The delamination FE models of mode I, mode Ⅱ and I/Ⅱ mixed-mode were made using VCCT and FEM. The proposed method was validated using existing mixed-mode experimental data. The parameters of power criterion and Benzeggagh-Kenane (B-K) criterion were identified using mixed-mode experimental data from reference. The delamination failure parameters was identified using experimental results of mode I and mode Ⅱ and simulative result of mixed-mode bending (MMB), for plain weave CFRP in automobile. Results show that parameters of failure criterion can be obtained accurately by the proposed method, which overcomes the high cost and long period of traditional experimental method.
JI Qing-hui, ZHU Ping, LU Jia-hai. Numerical simulation and parameter identification of delamination failure for laminate. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(5): 954-960.
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