Different R-Curves for Two- and Three-Dimensional Cracks

Different R-Curves for Two- and Three-Dimensional Cracks
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二维和三维裂纹的不同 R 曲线

DOI:
10.1007/s10704-008-9289-0
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发表时间:
2008
影响因子:
2.5
通讯作者:
R. Oberacker
R. Oberacker
中科院分区:
工程技术3区
文献类型:
--
作者:
T. Fett;S. Fünfschilling;Michael J. Hoffmann;R. Oberacker

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由裂纹面相互作用引起的R曲线对于具有小裂纹的构件的强度评估是重要的。尽管在断裂力学的基础上很好地理解了初始裂纹长度对R曲线的影响,但这里将表明,裂纹的类型也影响裂纹扩展阻力。对于一个给定的裂纹桥接关系,它可以表明,三维裂纹的圆形内部裂纹和半圆形表面裂纹必须表现出一个较低的R曲线比从二维边缘裂纹。
R-curves caused by crack face interactions are important for the strength assessment of components with small cracks. Whereas an influence of the initial crack length on the R-curve is well understood on the basis of fracture mechanics, it will be shown here that also the type of the crack affects the crack growth resistance. For a given crack-bridging relation it can be shown that 3-dimensional cracks as circular internal cracks and semi-circular surface cracks must exhibit a lower R-curve than obtainable from 2-dimensional edge cracks.
DOI: 10.1016/0013-7944(81)90116-8
发表时间: 1981-01-01
影响因子: 5.4
作者:
NEWMAN, JC;RAJU, IS
通讯作者: RAJU, IS
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