Analysis of Dynamic Stress Intensity Factors of Three-Point Bend Specimen Containing Crack

CHEN Ai-jun; CAO Jun-jun

doi:10.3879/j.issn.1000-0887.2011.02.007

Volume 32 Issue 2

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CHEN Ai-jun, CAO Jun-jun. Analysis of Dynamic Stress Intensity Factors of Three-Point Bend Specimen Containing Crack[J]. Applied Mathematics and Mechanics, 2011, 32(2): 194-201. doi: 10.3879/j.issn.1000-0887.2011.02.007

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Analysis of Dynamic Stress Intensity Factors of Three-Point Bend Specimen Containing Crack

doi: 10.3879/j.issn.1000-0887.2011.02.007

School of Sciences, Nanjing University of Science and Technology, Nanjing 210094, P. R. China

Received Date: 2010-07-29
Rev Recd Date: 2010-12-28
Publish Date: 2011-02-15

Abstract

Abstract

A new formula was produced to calculate dynamic stress intensity factors of three-point bend specimen containing a single edge crack. Firstly,the weight function for three-point bend specimen containing a single edge crack was derived from a general weight function form and two reference stress intensity factors. The coefficients of the weight function were given. Secondly,the history and distribution of dynamic stresses in unflawed three-point bend specimen which takes account of the effects of rotator inertia and shear deformation were inferred according to vibration theory. Finally,the dynamic stress intensity factor equations for three-point bend specimen with a single edge crack subjected to impact loadings were obtained by weight function method. The new formula was verified by the comparison with the numerical results of FEM(finite element method). Good agreement was achieved. And the law of dynamic stress intensity factors of three-point bend specimen under impact loadings changing with crack depths and loading rates was studied.
- cracks,
- dynamic stress intensity factors,
- weight function method,
- three-point bend specimen,
- loading rate

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References(15)

References

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