Modelling of spall damage in ductile materials and its application to the simulation of the plate im

来源 :Chinese Physics B | 被引量 : 0次 | 上传用户:a504468075
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A statistical model of dynamic spall damage due to void nucleation and growth is proposed for ductile materials under intense loading, which takes into account inertia, the elastic-plastic effect, and initial void size. To some extent, void interaction could be accounted for in this approach. Based on this model, the simulation of spall experiments for copper is performed by using the Lagrangian finite element method. The simulation results are in good agreement with experimental data for the free surface velocity profile, stress record behind copper target, final porosity, and void concentrations across the target. The influence of elastic-plastic effect upon the damage evolution is explored. The correlation between the damage evolution and the history of the stress near the spall plane is also analyzed. A statistical model of dynamic spall damage due to void nucleation and growth is proposed for ductile materials under intense loading, which takes into account inertia, the elastic-plastic effect, and initial void size. To some extent, void interaction could be accounted for in this approach. Based on this model, the simulation of spall experiments for copper is performed by using the Lagrangian finite element method. The simulation results are in good agreement with experimental data for the free surface velocity profile, stress record behind copper target, final porosity The influence of elastic-plastic effect upon the damage evolution is explored. The correlation between the damage evolution and the history of the stress near the spall plane is also analyzed.
其他文献
急性出血坏死性胰腺炎(AHNP)发病机制尚不清楚,80年代末期有人提出白细胞过渡激活学说,急性重症胰腺炎与肿瘤坏死因子 Acute hemorrhagic necrotizing pancreatitis (AHNP)
外伤性膈疝是胸腹部一种严重的损伤,往往合并多器官伤,及时诊断治疗较难,因而延误治疗者多。本文将我院近十年来收治的外伤性膈疝12例进行分析,着重讨论其诊断问题。一、临
二元一次方程组是中考重点考查的知识点之一·试题的呈现形式除单独出现方程(组)的内容以外,它经常与不等式、函数以及几何图形等有机联系,以综合题的形式出现·这一类题型与
在网络化时代,生产商如何因时而变,以顾客为导向,进行渠道决策是一个值得关注的问题。本文从生产商的角度,探讨了当消费者不存在渠道偏好时,混合渠道相对于单一传统零售渠道
敬老孝亲是中华民族的传统美德,千百年来,无数孝子的事迹被广为传颂。随着时代的发展与进步,孝子不断被赋予新的内涵,但亘古不变的,是孝子始终牢记父母养育之恩、竭尽所能为
也许您会很奇怪,钥匙的作用不就是开锁吗?难道还有别的作用?您还真猜对了,钥匙确实还有其它的作用。不信,您往下看就知道了。我的外甥正在读初中,他所在的学校属于寄宿制学校,每两个
目的:探究人性化护理管理在妇产科腹腔镜手术围术期的应用。方法:研究对象选取为2014~2015年医院收治的100例妇产科腹腔镜手术患者,采用数字表法随机分为观察组和对照组各50
例1 女,52岁。饱餐后突然剧烈胸痛就诊,于1994年5月入院。既往健康。查体:血压16/11 kPa,呼吸18次/分,脉搏78次/分,神志清,头颈器官无异常,肺(-),心率78次/分,心音低弱,无杂
宣网报道:2005年9月12日下午18时,随着启动指令的下达,一条木纹色的彩带划出活套,穿过热贴膜机,跳上卷取机,瞬间打包成卷。新开发的热贴膜彩涂板的顺利下线,标志着马钢彩涂板
我国铝工业发展面临的压力国际竞争压力剧增。从外部看,加入W TO后,市场彻底融通无国界,关税不断下降,铝工业竞争的国际化已是“零距离”,技术、资本运作、原材料和初级产品