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
Citation: 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

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

doi: 10.3879/j.issn.1000-0887.2011.02.007
  • Received Date: 2010-07-29
  • Rev Recd Date: 2010-12-28
  • Publish Date: 2011-02-15
  • 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.
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