[1]琚宏昌,陈国荣..混凝土梁裂纹扩展的内聚区模型数值模拟[J].郑州大学学报(工学版),2008,29(03):10-14.[doi:10.3969/j.issn.1671-6833.2008.03.003]
　Ju Hongchang,Leslie Chan.Numerical simulation of cohesive zone model of crack propagation of concrete beams[J].Journal of Zhengzhou University (Engineering Science),2008,29(03):10-14.[doi:10.3969/j.issn.1671-6833.2008.03.003]

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混凝土梁裂纹扩展的内聚区模型数值模拟()

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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

29卷

期数:

2008年03期

页码:

10-14

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Numerical simulation of cohesive zone model of crack propagation of concrete beams

作者:

琚宏昌; 陈国荣.

河海大学,工程力学系,江苏,南京,210098, 河海大学,工程力学系,江苏,南京,210098

Author(s):

Ju Hongchang; Leslie Chan

关键词:

动力学;  内聚区模型;  有限元;  断裂;  数值模拟

Keywords:

Dynamics;  cohesion zone model;  finite elements;  fracture;  Numerical simulation

DOI:

10.3969/j.issn.1671-6833.2008.03.003

文献标志码:

A

摘要:

为了对混凝土简支梁进行动载荷下断裂破坏的数值模拟,运用动力学虚功原理、时间步长、双线性内聚区模型,采用常规有限元下内聚区模型相结合的方法,编制了简支梁动态分析的程序代码.借助于商业软件ABAQUS强大的前、后处理的功能,验证内聚单元尺寸应当控制在内聚区长度的二分之一以内.在裂纹开裂后的起始阶段,裂纹扩展速度较慢,随后以平稳速度向上传播.算例证明,常规有限元与内聚区模型相结合的方法在模拟裂纹自然发生的断裂过程方面有着广阔的应用前景.

Abstract:

In order to simulate the fracture failure of concrete simple supported beams under dynamic load, the program code for dynamic analysis of simple supported beams was compiled by using the principle of dynamic virtual work, time step, bilinear cohesion zone model, and conventional finite element cohesion zone model. With the help of the powerful pre- and post-processing functions of the commercial software ABAQUS, the size of the verification cohesion unit should be controlled within one-half of the length of the cohesion area. In the initial stage after crack cracking, the crack propagation rate is slower, and then it propagates upward at a steady speed. The example shows that the method combining conventional finite element and cohesion zone model has broad application prospects in simulating the naturally occurring fracture process of cracks.

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