基于损伤力学的金属材料韧性断裂失效分析
DOI:
CSTR:
作者:
作者单位:

(海军航空工程学院青岛校区,青岛 266041)

作者简介:

通讯作者:

中图分类号:

基金项目:


Fracture Failure Analysis of Ductile Metals Based onContinuum Damage Mechanism
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    金属韧性断裂是损伤累积的结果,以孔洞演化理论和细观损伤力学模型为基础,将韧性断裂机制
    分为拉伸型和剪切型两种类型,提出了一个适用于不同变形路径的统一形式的韧性断裂准则。通过编写用户
    材料子程序VUMAT,将韧性断裂准则嵌入到ABAQUS 有限元软件的准静态算法主程序中,模拟了航空铝合金
    LY12CZ(Kt =1 和3)单向拉伸时材料损伤累积、裂纹萌生、扩展直至韧性断裂的物理全过程,并通过拉伸试验
    验证了模型的有效性。韧性金属材料孔洞断裂机制研究表明,单调加载过程中宏观裂纹的形成是孔洞在夹杂
    物和第二相微粒周围形核、长大直至聚合的结果。

    Abstract:

    Ductile fracture in metals is the accumulative result of damage. The basic mechanisms of ductile fracture
    are divided into two modes (tension-type mode and shear-type mode) according to voids evolution model and meso-
    damage mechanism. A unified ductile fracture criterion is proposed for wide applicable range. The proposed ductile
    fracture criterion is implemented into quasi-static finite element method through a compilation of user’s material subroutine
    VUMAT of the commercial finite element platform ABAQUS. The ductile fracture model is validated by comparing
    between experimental data and numerical results. It is shown that the proposed ductile fracture model can accurately
    and effectively predict the whole damage process of ductile metals including crack initiation, propagation and final
    fracture. Ductile metallic materials voids-fracture mechanism studies show that the formation of macroscopic crack
    monotonic in the loading process are the growth of voids in the inclusions and second phase particles around the nucleation
    until the polymerization.

    参考文献
    相似文献
    引证文献
引用本文

苏维国,穆志韬,刘 涛,马晓乐.基于损伤力学的金属材料韧性断裂失效分析[J].宇航材料工艺,2014,44(2):24-28.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2016-11-28
  • 出版日期:
文章二维码