摘要
复合材料层合板由于具有轻质高强、设计性强等优良性能,在航空航天等领域得到广泛运用。其每层的铺设角度对层合板的力学性能具有重要影响。为了提高层合板抗低速冲击性能,对层合板的铺设角进行了设计,并对其在低速冲击下进行破坏机理研究,建立了非线性铺设角层合板低速冲击有限元模型。采用渐进损伤模型研究了材料的破坏行为,采用基于应力的破坏准则、断裂能准则和刚度退化法模拟纤维、基体和分层界面损伤开始及演化。通过对非线性铺设角层合板的最大峰值载荷、能量吸收和破坏行为的分析,详细揭示非线性铺设角对层合板抗低速冲击性能的影响及其失效机理。结果表明,非线性铺设角对层合板抗低速冲击性能有重要影响。本研究为改善层合板抗低速冲击性能提供了一定的设计依据。
Composite laminates are widely used in aerospace and other fields because of their excellent properties such as light weight,high strength and easy to design.The laying angle of each layer has an important effect on the mechanical properties of laminates.To improve the low-velocity impact resistance of laminates,the laying angle of laminates is designed and the failure mechanism of laminates under low-velocity impact is studied.The finite element model of nonlinear laying angle composite laminates under low-velocity impact is established.The progressive damage model is used to study the failure behavior of materials.The damage initiation and evolution of fiber,matrix and layered interface are simulated by stress-based failure criterion,fracture energy criterion,and stiffness degradation method.Through the analysis of the maximum peak load,energy absorption and failure behavior of nonlinear angle composite laminates,the influence of nonlinear angle on the low-velocity impact resistance of laminates and its failure mechanism are revealed in detail.The results show that the nonlinear laying angle has an important influence on the low-velocity impact resistance of laminates.This study provides a certain design basis for improving the low-velocity impact resistance of laminates.
作者
任毅如
邓亚斌
Ren Yiru;Deng Yabin(State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082,China)
出处
《航空科学技术》
2021年第12期84-90,共7页
Aeronautical Science & Technology
基金
国家自然科学基金(51621004)。
关键词
低速冲击
复合材料层合板
非线性铺设角
耐撞性
有限元
low-velocity impact
composite laminates
non-linear laying angle
crashworthiness
finite element method
