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基于ABAQUS有限元软件结合VC++6.0程序设计,建立了含不同铺层角度、不同排列密度形状记忆合金(SMA)纤维的复合材料层合板有限元模型。将基于Brinson本构模型的SMA分段线性超弹性模型以及判断复合材料层内失效的三维HASHIN失效准则编译至ABAQUS/VUMAT子程序,使用界面单元模拟复合材料层间区域,建立了SMA复合材料层合板的低速冲击损伤及冲击后剩余强度数值模拟方法。对比了不含SMA纤维层合板、含SMA纤维层合板、含普通金属丝层合板在不同冲击能量下的损伤响应。进一步分析了SMA纤维体积分数和直径变化对冲击响应的影响。冲击后剩余压缩强度模拟结果表明:冲击能量为16J时,含体积分数25%、直径0.5mm的SMA纤维层合板的冲击后剩余压缩强度相比不含SMA纤维层合板提高5.78%、相比含普通金属丝层合板提高4.69%。随着SMA纤维体积分数提高,层合板的抗低速冲击能力增强,当体积分数一定时,较细的(0.3mm)SMA纤维比粗的(0.6mm)SMA纤维对层合板的抗低速冲击能力增强效果更好。
Based on ABAQUS finite element software combined with VC ++ 6.0 program design, a finite element model of composite laminates with different lay angles and different shape and density of shape memory alloy (SMA) fibers was established. The SMA piecewise linear hyperelastic model based on the Brinson’s constitutive model and the three-dimensional HASHIN failure criterion for determining the failure in the composite layer were compiled into the ABAQUS / VUMAT subroutine. Interface elements were used to simulate the interlayers of the composite materials. The SMA composite layer Low velocity impact damage of plywood and numerical simulation method of residual strength after impact. The damage response of SMA fiber laminates and SMA fiber laminates with ordinary wire laminates under different impact energies was compared. The influence of SMA fiber volume fraction and diameter on impact response was further analyzed. The simulation results of residual compressive strength after impact show that the impact compressive strength of SMA fiber laminates with 25% volume fraction and 0.5mm diameter increase by 5.78% compared with those without SMA laminates at impact energy of 16 J, Ordinary wire laminates increased by 4.69%. With the increase of SMA fiber volume fraction, the anti-low-velocity impact ability of laminate is enhanced. When the volume fraction is constant, the thinner (0.3mm) SMA fibers have lower resistance to lamination than the thick (0.6mm) SMA fibers Enhance better.