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| 内部爆炸加载条件下圆柱钢壳的动态断裂 | |
| 引用本文： | 胡永乐,陈子辰,王峰超,白书欣,张虹.内部爆炸加载条件下圆柱钢壳的动态断裂[J].机械强度,2010,32(1). |
| 作者姓名： | 胡永乐 陈子辰 王峰超 白书欣 张虹 |
| 作者单位： | 1. 浙江大学,机械与能源工程学院,杭州,310027;西北核技术研究所,西安,710024 2. 浙江大学,机械与能源工程学院,杭州,310027 3. 西北核技术研究所,西安,710024 4. 国防科技大学,航天与材料工程学院,长沙,410073 |
| 摘 要： | 在内部爆炸冲击波载荷作用下,爆炸容器的动态断裂是进行爆炸容器安全评估和失效分析的基础。为了研究爆炸容器的动态断裂特征,进行圆柱钢壳在中心装药的爆炸加载实验,采用非线性动力有限元分析程序LS-DYNA分析圆柱钢壳的弹塑性动力响应,研究圆柱钢壳的宏观变形和断口的宏观、细观形貌,分析圆柱钢壳的断裂模式及断裂机理。结果表明,圆柱钢壳纵向断口具有微孔聚集型剪切韧窝断裂特征,呈现出微孔聚集型剪切韧性断裂模式。内部爆炸冲击波加载下圆柱钢壳因径向膨胀发生动态塑性变形,产生剪切带,由于剪切带的软化效应而成为优先断裂通道,剪切带和环向拉应力的共同作用是形成微孔聚集型剪切韧窝断裂这种混合韧性断裂模式的原因。 |
| 关 键 词： | 圆柱钢壳 冲击波载荷 塑性变形 剪切带 剪切韧窝断裂 |
DYNAMIC FRACTURE OF CYLINDRICAL STEEL SHELL UNDER INSIDE-EXPLOSION LOADING |
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| HU YongLe,CHEN ZiChen,WANG FengChao,BAI ShuXin,ZHANG Hong.DYNAMIC FRACTURE OF CYLINDRICAL STEEL SHELL UNDER INSIDE-EXPLOSION LOADING[J].Journal of Mechanical Strength,2010,32(1). | |
| Authors: | HU YongLe CHEN ZiChen WANG FengChao BAI ShuXin ZHANG Hong |
| Affiliation: | 1. College of Mechanical and Energy/a>;Zhejiang University/a>;Hangzhou 310027/a>;China;2. Northwest Institute of Nuclear Technology/a>;Xi'an 710024/a>;China;3. College of Aerospace and Material Engineering/a>;National Universityof Defense Technology/a>;Changsha 300072/a>;China |
| Abstract: | Dynamic fracture of explosion containment vessels(ECVs) subjected to internal blast loads is the foundation for conducting safety assessment and failure analysis of ECVs. The experiments were carried out to investigate dynamic fracture characteristics of cylindrical steel shells subjected to internal blast loadings at the centers. The elastic-plastic response of cylindrical steel shells was conducted using nonlinear dynamic finite element analysis(FEA) code LS-DYNA. The fracture mode and fracture mechanism ... |
| Keywords: | Cylindrical steel shell Shock wave loads Plastic deformation Shearing band Shearing dimple fracture mode |
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