复合材料整体化加筋壁板高速冲击损伤数值模拟

doi:CNKI:11-1929/V.20110831.1320.005

固体力学与飞行器总体设计

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复合材料整体化加筋壁板高速冲击损伤数值模拟

古兴瑾, 许希武

南京航空航天大学机械结构力学与控制国家重点实验室, 江苏南京 210016

收稿日期:2011-05-16 修回日期:2011-07-07 出版日期:2012-02-25 发布日期:2012-02-24
通讯作者: 许希武 E-mail:xwxu@nuaa.edu.cn
作者简介:古兴瑾男,博士研究生.主要研究方向:工程问题的力学建模与数值仿真,结构生存力设计与评定技术. Tel: 025-84891781 E-mail: guxingjin@nuaa.edu.cn
许希武男,博士,教授,博士生导师.主要研究方向:工程问题的力学建模与数值仿真,复合材料力学,飞行器结构完整性评定技术. Tel: 025-84891781 E-mail: xwxu@nuaa.edu.cn
基金资助:
国家自然科学基金(10672075)

Numerical Simulation of Damage in Stiffened Integral Composite Panels Under High Velocity Impact

GU Xingjin, XU Xiwu

State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received:2011-05-16 Revised:2011-07-07 Online:2012-02-25 Published:2012-02-24

摘要/Abstract

摘要： 以复合材料结构抗弹性能分析与设计为目的,根据纤维的线弹性假设和基体的粘弹性假设,推导了复合材料单向板的粘弹性本构关系,导出了高应变率下复合材料层板的一阶剪切理论,建立了复合材料整体化加筋壁板高速冲击有限元分析模型.该模型引入界面单元模拟复合材料层间分层以及筋条与壁板间的脱粘损伤,结合Hashin失效准则进行筋条和单层板面内损伤识别,引入材料刚度退化,采用非线性有限元方法,研究了复合材料加筋结构高速冲击的破坏过程及损伤特性.数值分析结果与实验结果吻合良好,证明了该方法的合理有效性.探讨了筋条参数对高速冲击损伤的影响规律,获得了一些有价值的结论.

关键词: 复合材料, 本构模型, 加筋壁板, 冲击, 损伤, 数值分析

Abstract: In order to analyze the ballistic characteristics of composite structures, a rate-dependent constitutive model is developed to simulate the response of the uni-directional fiber reinforced composite under high velocity impact based on the assumption that the fiber is linear-elastic and the matrix is visco-elastic. The first-order shear deformation laminate theory is deduced at high strain rate. A finite element model is established to simulate the ballistic response of the stiffened composite panel. In this model, the cohesive elements are used to simulate the delamination of the composite panel and debonding between the composite panel and the stiffener. The Hashin's failure criteria are used to predict the inplane failure of the stiffener and composite panel by replacing quasi-static strength properties with rate-dependent strength properties. By using a degradation constitutive model of the mechanical properties, the damage of a stiffened composite panel under high velocity is simulated. The numerical results agree well with the experimental results. Parametric studies are conducted to study the effect of the stiffener parameters on the damage of the stiffened composite panel. A number of valuable conclusions are obtained.

Key words: composite materials, constitutive models, stiffened panel, impact, damage, numerical analysis

中图分类号:

V258.3
O385

古兴瑾, 许希武. 复合材料整体化加筋壁板高速冲击损伤数值模拟[J]. 航空学报, 2012, 33(2): 258-272.

GU Xingjin, XU Xiwu. Numerical Simulation of Damage in Stiffened Integral Composite Panels Under High Velocity Impact[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, 33(2): 258-272.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

复合材料整体化加筋壁板高速冲击损伤数值模拟

Numerical Simulation of Damage in Stiffened Integral Composite Panels Under High Velocity Impact

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