空间碎片超高速撞击充气压力容器前壁准静态破坏分析

盖芳芳; 庞宝君; 管公顺

doi:10.11858/gywlxb.2011.01.008

空间碎片超高速撞击充气压力容器前壁准静态破坏分析

doi: 10.11858/gywlxb.2011.01.008

1.
黑龙江科技学院理学院，黑龙江哈尔滨 150027；
2.
哈尔滨工业大学空间碎片高速撞击研究中心，黑龙江哈尔滨 150080

详细信息

通讯作者:
盖芳芳

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出版历程
- 收稿日期: 2009-10-20
- 修回日期: 2009-12-07
- 刊出日期: 2011-02-15

Quasi-Static Bursting Analysis of Gas-Filled Pressure Vessels on the Front Side under Hypervelocity Impact

1.
Heilongjiang institute of science and Technology, Harbin 150027, China;
2.
Hypervelocity Impact Research Center, HIT Aerospace Laboratory, Harbin 150080, China

More Information

Corresponding author: GAI Fang-Fang

摘要

摘要: 针对空间碎片超高速撞击充气压力容器前壁发生准静态破坏问题，将其简化为受双向拉应力的圆孔边双裂纹的线弹性断裂问题进行处理；并在数值模拟及理论分析的基础上建立了充气压力容器前壁发生准静态破坏的预报模型，得到了当球形弹丸撞击速度为7.0 km/s时、壁厚为1.0 mm的Al5754圆柱形压力容器前壁发生准静态破坏的临界应力曲线，计算结果与实验结果比较吻合。计算结果表明：前壁穿孔直径与裂纹直径皆随着弹丸直径的增加而增加；若孔边的单裂纹长度与穿孔半径的比值超过0.5，则可以将穿孔近似为狭长贯穿直裂纹进行处理。分析还得出当容器内压力较大时，具有较小动能的弹丸就可能导致容器在撞击瞬间发生裂纹失稳破坏。
- 空间碎片 /
- 高速撞击 /
- 压力容器 /
- 断裂力学 /
- 准静态破坏
Abstract: In a given set of impact velocity conditions, the numerical simulation is performed to analyze the effect of the projectile diameter on perforation of the front wall of gas-filled pressure vessels. Then the critical stress value is estimated based on the stress intensity factor which is determined by simplified linear elastic fracture mechanics, and the computational model is built. The model is presented by postulating the existence of two-radial cracks that emanate at the boundary of a circular hole. The result shows that a good correlation between experimental and computational results is obtained. If the ratio of single crack length to hole radius exceeds the value of 0.5, the hole with radial cracks can be considered as a straight crack. The projectile with small kinetic energy is likely to lead catastrophic burst of pressure vessels.
- space debris /
- hypervelocity impact /
- pressure vessels /
- fracture mechanics /
- quasi-static bursting

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参考文献(15)

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