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后路椎弓根螺钉系统治疗特发性腰椎侧凸的有限元分析
  • ISSN号：1004-7220
  • 期刊名称：《医用生物力学》
  • 时间：0
  • 分类：O346.1[理学—固体力学;理学—力学]
  • 作者机构：[1]Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China, [2]Department of Basic Science, Graduate School at Shenzhen, Harbin Institute of Technology, Shenzhen 518055, China
  • 相关基金：Project supported by the National Nature Science Foundation of China （Nos. 10572067, 10525210 and 10121202）.
作者： 胡明涛[1], 韦兴[2], 赵红平[1], 冯西桥[1]
关键词： 裂缝, 楔, 源位错, 柔软跃迁, 位错构型, dislocation source, crack, wedge, brittle-to-ductile transition
中文摘要：

脱臼配置，快克在一个裂缝或一个楔尖端的附近在脱臼来源的被触发的负担上弄钝和免费表面的效果在远地里使遭到了到张力的负担被调查。为脱臼来源的一个适当被触发标准被考虑对每脱臼起作用的 configurational 力量建议。脱臼来源的被触发的行为接近一个裂缝的尖端，楔被比较。这也被发现在裂缝或楔附近弄钝裂缝尖端和免费表面的存在在脱臼来源的被触发的负担上有可观的影响。这研究可能具有到获得材料的 brittle-to-ductile 转变的更深的理解的意义。

英文摘要：

The effects of dislocation configuration, crack blunting and free surfaces on the triggering load of dislocation sources in the vicinity of a crack or a wedge tip subjected to a tensile load in the far field are investigated. An appropriate triggering criterion for dislocation sources is proposed by considering the configurational forces acting on each dislocation. The triggering behaviors of dislocation sources near the tips of a crack and a wedge are compared. It is also found that the blunting of crack tip and the presence of free surfaces near the crack or the wedge have considerable influences on the triggering load of dislocation sources. This study might be of significance to gaining a deeper understanding of the brittle-to-ductile transition of materials.

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期刊信息
  • 《医用生物力学》
  • 北大核心期刊（2011版）
  • 主管单位:教育部
  • 主办单位:上海交通大学
  • 主编：戴尅戎
  • 地址：上海市制造局路639号
  • 邮编：200011
  • 邮箱：shengwulixue@163.com
  • 电话：021-53315397
  • 国际标准刊号：ISSN：1004-7220
  • 国内统一刊号：ISSN：31-1624/R
  • 邮发代号:4-633
  • 获奖情况:
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘（网络版）,英国农业与生物科学研究中心文摘,波兰哥白尼索引,荷兰文摘与引文数据库,美国剑桥科学文摘,中国中国科技核心期刊,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）
  • 被引量:4565