| 缺口裂纹起裂和扩展检测的直流电位法 |
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| 引用本文： | 王威强,李培宁.缺口裂纹起裂和扩展检测的直流电位法[J].实验力学,1992,7(1):51-59. |
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| 作者姓名： | 王威强 李培宁 |
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| 作者单位： | 华东化工学院，华东化工学院，华东化工学院 |
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| 摘 要： | 本文从解析法、有限元分析和试验三方面探讨了直流电位法用于缺口问题的有效性。当缺口宽度与试样宽度之比较小时(如小于0.05),根据电位的改变量,解析法才能给出缺口裂纹扩展满意的推算.分析和试验说明,利用电位的改变反推缺口裂纹的扩展时,必须引入由于变形引起的缺口宽度变化对电位影响的修正.
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| 关 键 词： | 缺口 起裂 裂纹扩展 直流电位法 |
Detection of Notch Crack Initiation and Propagation by DC Potential Drop Method |
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| Wang Weiqiang Li Peining Ju Dingyi.Detection of Notch Crack Initiation and Propagation by DC Potential Drop Method[J].Journal of Experimental Mechanics,1992,7(1):51-59. |
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| Authors: | Wang Weiqiang Li Peining Ju Dingyi |
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| Institution: | East China University of Chemical Technology |
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| Abstract: | Abstract In this paper,the validity of DC potential drop method applied to notch prob- lem has been investigated by means of analytical method,finite element analysis,and experi- mental method.Only when the ratio of notch width to specimen width is fairly small(say less than about 0.05),the analytical solution could give appreciate reckoning of notch crack propa- gation from the change of potential.Analyses and experiments show that the modification of the influence of notch width change,which is a result of deformation,on the potential must be taken into consideration in notch crack propagation calculation based upon the change of po- tential. |
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| Keywords: | notch crack initiation crack propagation DC potential drop method detection |
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