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Abstract

Using a high precision triangular finite element model, the elastic stress field in a symmetric rail shear test specimen is determined. The results are graphically presented and discussed. A simple finite element technique for energy release rate analysis of the pre-cracked test specimen is presented. Numerical results showing the effects of material properties and crack length are tabulated as normalized stress-intensity fac tors. Based on this numerical study it is fair to say that the symmetric rail shear test with some modifications is a viable method for shear characterization of composite materials in general and for G_IIC determination in particular. Final acceptance of the test method, however, awaits experimental verification.

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References

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A Symmetric Rail Shear Test for Mode II Fracture Toughness (GIIC) of Composite Materials—Finite Element Analysis

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