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为了研究Nomex-Kevlar平纹织物对空间碎片的超高速撞击力学特性,运用LS-DYNA本构模型二次开发技术开发了Nomex-Kevlar平纹织物在超高速撞击条件下的带最大应力失效标准的线弹性正交各向异性本构模型,并定义了Nomex-Kevlar平纹织物在超高速撞击条件下的Gruneison状态方程参数。运用光滑粒子流体动力学方法和有限元方法建立了与NASA试验工况相同的Al-2017-T4球形弹丸以6.84 km/s速度斜向30°撞击Nomex-Kevlar平纹织物的数值分析模型。仿真结果与试验结果的比较表明,本文中开发的本构模型以及建立的数值分析模型可以准确描述Nomex-Kevlar平纹织物的超高速撞击力学特性。
In order to study the super high-speed impact mechanical properties of Nomex-Kevlar plain weave on space debris, linear elasticity of the Nomex-Kevlar plain weave with maximum stress failure criterion under hypervelocity impact was developed using the secondary development technique of LS-DYNA constitutive model Orthotropic constitutive model and defines the Gruneison equation of state parameters for the Nomex-Kevlar plain weave under hypervelocity impact conditions. The numerical analysis model of Nomex-Kevlar plain weave fabricated by Al-2017-T4 spherical projectile with the same NASA test condition and inclined 30 ° at 6.84 km / s was established by using the method of smooth particle hydrodynamics and finite element method. The comparison between the simulation results and the experimental results shows that the constitutive model developed in this paper and the numerical analysis model established can accurately describe the superhigh-speed impact mechanical properties of Nomex-Kevlar plain weaves.