一种模拟准脆性断裂问题的相场法能量退化法则

TV223.1; 介绍了相场法模拟准脆性断裂问题的基本原理,描述了幂函数能量退化法则与Borden能量退化法则,提出了一种模拟准脆性断裂问题的相场法耦合能量退化法则,该法则通过权重系数将幂函数能量退化法则与Borden能量退化法则进行耦合,可较为全面地反映材料的断裂行为.编制了二维相场法计算程序,以单边缺口正方形板为例,验证了程序的准确性.研究了耦合能量退化法则对单边缺口方形板拉伸断裂行为的影响,耦合能量退化法则参数s与m越大,拉伸荷载峰值越低;增加参数w,拉伸荷载峰值会提高.模拟了直裂缝半圆弯曲岩石试样断裂过程,分析了不同耦合能量退化法则参数下岩石试样的裂缝扩展过程,耦合能量退化法则参数m对...

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Published in中国农村水利水电 no. 7; pp. 201 - 207
Main Authors 张巍, 庄梦如, 朱潇潇, 沈蔚, 陈敏
Format Journal Article
LanguageChinese
Published 淮安市水利勘测设计研究院有限公司,江苏淮安 223005 15.07.2022
Subjects
拉伸断裂
相场法
半圆弯曲试样
能量退化准则
准脆性断裂
Online AccessGet full text
ISSN1007-2284

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Abstract TV223.1; 介绍了相场法模拟准脆性断裂问题的基本原理,描述了幂函数能量退化法则与Borden能量退化法则,提出了一种模拟准脆性断裂问题的相场法耦合能量退化法则,该法则通过权重系数将幂函数能量退化法则与Borden能量退化法则进行耦合,可较为全面地反映材料的断裂行为.编制了二维相场法计算程序,以单边缺口正方形板为例,验证了程序的准确性.研究了耦合能量退化法则对单边缺口方形板拉伸断裂行为的影响,耦合能量退化法则参数s与m越大,拉伸荷载峰值越低;增加参数w,拉伸荷载峰值会提高.模拟了直裂缝半圆弯曲岩石试样断裂过程,分析了不同耦合能量退化法则参数下岩石试样的裂缝扩展过程,耦合能量退化法则参数m对荷载峰值影响较小,荷载峰值与参数s负相关,与参数w正相关.耦合能量退化法则可以较好地反映材料的准脆性断裂与脆性断裂行为.
AbstractList TV223.1; 介绍了相场法模拟准脆性断裂问题的基本原理,描述了幂函数能量退化法则与Borden能量退化法则,提出了一种模拟准脆性断裂问题的相场法耦合能量退化法则,该法则通过权重系数将幂函数能量退化法则与Borden能量退化法则进行耦合,可较为全面地反映材料的断裂行为.编制了二维相场法计算程序,以单边缺口正方形板为例,验证了程序的准确性.研究了耦合能量退化法则对单边缺口方形板拉伸断裂行为的影响,耦合能量退化法则参数s与m越大,拉伸荷载峰值越低;增加参数w,拉伸荷载峰值会提高.模拟了直裂缝半圆弯曲岩石试样断裂过程,分析了不同耦合能量退化法则参数下岩石试样的裂缝扩展过程,耦合能量退化法则参数m对荷载峰值影响较小,荷载峰值与参数s负相关,与参数w正相关.耦合能量退化法则可以较好地反映材料的准脆性断裂与脆性断裂行为.
Author 朱潇潇
陈敏
张巍
庄梦如
沈蔚
AuthorAffiliation 淮安市水利勘测设计研究院有限公司,江苏淮安 223005
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SHEN Wei
ZHU Xiao-xiao
ZHANG Wei
ZHUANG Meng-ru
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相场法
半圆弯曲试样
能量退化准则
准脆性断裂
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