ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Crashworthiness of composite corrugated beam based on nonlinear progressive damage model
Received date: 2016-08-29
Revised date: 2016-11-11
Online published: 2017-01-09
Supported by
National Natural Science Foundation of China (11402011);the Fundamental Research Funds for the Central Universities (201401390741)
Based on continuum damage mechanics, a nonlinear progressive damage model including intra-and inter-laminar failures was presented to predict the failure behavior of composite corrugated beam under the axial crushing. The maximum stress criterion combined with exponential damage evolution laws and stiffness discount method were adopted to predict the material parameters of intra-laminar damage. The inter-laminar damage model was modeled by a quadratic nominal stress criterion, an exponential damage evolution law based on the mixed-mode energy and cohesive stiffness discount method. Based on this model, the effect of triggers and the typical parameters of corrugated beam structures on crashworthiness were investigated. The results of numerical simulation show basic agreement with the experimental data. The failure modes of delamination, fiber and matrix damage that appeared in the impact process of composite corrugated beam can be simulated accurately. During the damage of corrugated beam, absorbed energy, specific energy absorption as well as the peak load are the increasing function with respect to the layers. In addition, the peak load decreases with the decreasing of height and trigger-sectional area.
JIANG Hongyong , REN Yiru , YUAN Xiuliang , GAO Binhua . Crashworthiness of composite corrugated beam based on nonlinear progressive damage model[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017 , 38(6) : 220717 -220717 . DOI: 10.7527/S1000-6893.2016.220717
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