| 宇航压力容器表面裂纹的断裂判据 |
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| 引用本文： | 宁杰.宇航压力容器表面裂纹的断裂判据[J].宇航学报,1987(2). |
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| 作者姓名： | 宁杰 |
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| 作者单位： | 西南交通大学数力系 |
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| 摘 要： | 用非线性线弹簧模型,对含有表面裂纹的球瓶破坏性实验结果进行了弹塑性断裂力学分析。讨论了对宇航薄壁压力容器表面裂纹建立安全评定标准的必要性。采用线弹性断裂力学分析方法可能给出危险的结果。将J_(m.d.p)=J_(IC)作为宇航压力容器表面裂纹弹塑性断裂的判据,具有准确,简便的优点。
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| 关 键 词： | 压力容器 高压气瓶 薄壁壳体 表面裂缝 弹塑性断裂 非线性线弹簧模型 |
ON THE FRACTURE CRITERION OF THE SURFACE CRACKED ASTRONAUTIC PRESSURE VESSEL |
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| Ning Jie.ON THE FRACTURE CRITERION OF THE SURFACE CRACKED ASTRONAUTIC PRESSURE VESSEL[J].Journal of Astronautics,1987(2). |
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| Authors: | Ning Jie |
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| Abstract: | By means of nonlinear line-spring model, this paper Presents the elastic-plastic fracture mechanics analysis for the destructive experimental results of astronautical thin-walled pressure vessels with surface cracks. Results shown that it is necessary to institute a suitable safety assessment standard for surface cracked astronautical thin-walled pressure vessels. The unreliable results obtained by linear elastic fracture mechanics analysis are shown. Therefore, this paper suggests Jm.d.p =JI c as the elastic-plastic fracture criterion of surface cracked astronautical pressure vessels. This criterion has advantages of accuracy and simplicity. |
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| Keywords: | Surface crack Pressure vessel Thin-walled shell Gas cylinder Ela-sticplastic fracture Nonlinear line-spring model |
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