Ballistic impact response for two-step braided three-dimensional textile composites
Ballistic impact response for two-step braided three-dimensional textile composites
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DOI：
10.2514/3.13074
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发表时间：
1996-02
期刊：
影响因子：
2.5
通讯作者：
S. Jenq;J. Mo
中科院分区：
文献类型：
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作者：
S. Jenq;J. Mo
研究了三维两步编织纺织复合材料在36.1-g半球形端部刚性圆柱体弹丸撞击下的弹道冲击响应。利用半球形压头进行了一系列准静态冲压试验，研究了靶板的渐进损伤模式，得到了冲压载荷-位移关系。此外，利用气动发射器推进弹丸的入射速度在70~170m/S之间，实验确定弹道极限接近74.1m/S，结合商用有限元程序(MARC)和三维两步编织复合材料的本构关系和所提出的静态侵彻模型来模拟动态冲击响应。应用能量考虑来预测弹丸的剩余(或终止)速度。基于目标静态弹性特性的数值模拟结果往往会高估弹丸的末端速度。在弹丸入射速度为70~180m/S范围内，当弹体的弹性模数为静态值的1.5倍时，模拟的末速度与试验结果吻合较好。
We are concerned with the ballistic impact response of three-dimensional two-step braided textile composites struck by a 36.1-g hemispherical tip-ended rigid cylindrical projectile. A series of quasistatic punch tests using a hemispherical indentor have been conducted to investigate the progressive damage modes of the target and to obtain the punch load-displacement relationship. In addition, a pneumatic launcher is used to propel the projectile with incident velocities ranging from 70 to 170 m/s. The ballistic limit is experimentally determined to be near 74.1 m/s. Commercially available finite element code (MARC) is incorporated with the constitutive relationship for three-dimensional two-step braided composites and the proposed static penetration model to simulate the dynamic impact response. An energy consideration is applied to predict the projectile's residual (or terminal) velocity. Numerical simulated result based on the static elastic properties of the target tends to overestimate the projectile terminal velocity. When the target's elastic moduli used in simulation are increased by 1.5 times the static values, good agreement is found between the simulated terminal velocities and test results for projectile incident velocities ranging from 70 to 180 m/s.