《复合材料学报》优先在线发表论文。
摘 要:采用有限元方法研究了振动边界条件对形状记忆合金(SMA)增强玻璃纤维/环氧树脂复合材料的抗低速冲击性能的影响。在数值模拟过程中,将改进的三维Hashin失效准则和Brinson模型分别应用于玻璃纤维/环氧树脂复合材料层合板和SMAs,以表征其本构关系。首先通过与固定边界条件下的SMA增强玻璃纤维/环氧树脂复合材料板低速冲击实验进行比较,验证了数值模拟过程中所用模型以及材料参数的准确性。其次,在模拟过程中,应用了包含不同振幅的一系列振动边界条件,对其进行模拟,揭示了振动边界条件对其抗低速冲击性能的影响。数值模拟结果表明,在大振幅条件下,无SMA复合材料的抗冲击性能比小振幅条件下弱;在相同振动边界条件下,SMA增强玻璃纤维/环氧树脂复合材料与无SMA复合材料相比,其抗低速冲击性能有提高。
关键词:形状记忆合金;冲击性能;振动边界条件;数值模拟;损伤
Abstract: Effect of the vibrating boundary condition on resistance of shape memory alloy (SMA) reinforced glass fiber/epoxy composites subjected to low-velocity impact was investigated by finite element method (FEM). In this investigation, Hashin’s failure criterion and Brinson’s model were implemented into FEM to charactering the constitutive relations of glass fiber/ epoxy resin laminates and SMAs, respectively. Fixed boundary condition was maintained in simulation to verify the accuracy of material parameters and procedures by comparing with impact experiment of SMA reinforced glass fiber/epoxy composite, firstly. Then, a series of vibrating boundaries with amplitudes was applied during the simulation process to reveal the effect on impact resistances. The simulation results indicate that impact resistance of the composite without SMA under large amplitude is lower than that under small amplitude; as for SMA reinforced composite the impact resistance is higher.
Keywords: shape memory alloy; impact resistance; vibrations; numerical analysis; failure
作者:孔方昀等,哈尔滨工程大学,航天与建筑工程学院,哈尔滨
通讯作者:王振清,哈尔滨工程大学,航天与建筑工程学院,哈尔滨
全文详见中国知网学术期刊优先数字出版。
来源:CSCM_OFFICE 中国复合材料学会
原文链接:https://mp.weixin.qq.com/s?__biz=MjM5MTA2NTk1Nw==&mid=2654408994&idx=3&sn=06346f4fda63061bb4e48ee6ccc4a4c1&scene=0#wechat_redirect
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