首页|An interlaminar damage shell model for typical composite structures
An interlaminar damage shell model for typical composite structures
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Using the plate/shell elements in commercial software,accurate analysis of interlaminar initial damage in typical composite structures is still a challenging issue.To propose an accurate and efficient model for analysis of interlaminar initial damage,the following work is carried out:(A)A higher-order theory is firstly proposed by introducing the local Legendre polynomials,and then a novel shell element containing initial damage prediction is developed,which can directly predict transverse shear stresses without any postprocessing methods.Unknown variables at each node are independent of number of layers,so the proposed model is more efficient than the 3D-FEM.(B)Compression experiment is carried out to verify the capability of the proposed model.The results obtained from the proposed model are in good agreement with experimental data.(C)Sev-eral examples have been analyzed to further assess the capability of the proposed model by compar-ing to the 3D-FEM results.Moreover,accuracy and efficiency have been evaluated in different damage criterion by comparing with the selected models.The numerical results show that the pro-posed model can well predict the initial interlaminar damage as well as other damage.Finally,the model is implemented with UEL subroutine,so that the present approach can be readily utilized to analyze the initial damage in typical composite structures.
Compression experimentFinite element methodInitial damageInterlaminar stressPlate/shell element
Jie ZHOU、Zhen WU、Zhengliang LIU、Xiaohui REN
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School of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China
National Key Laboratory of Strength and Structural Integrity,Xi'an 710065,China
School of Mechanical Engineering,Xi'an Aeronautical University,Xi'an 710065,China
National Natural Science Foundation of China&&Natural Science Foundation in Shaanxi Province,China
NETL
NSTL
万方数据
维普
