抄録
Strain gage method for determining generalized stress intensity factors of V-notched plates under mixed-mode conditions is proposed. The plates with V-shaped edge notches are subjected to in-plane bending. First, a theory of determining the stress intensity factors using strain gages is presented on the basis of two dimensional elasticity theory. Two strain gages are positioned along the two lines θ1and θ2 extending from the bisector of the notch. The type of strain gages is a strip strain gage with five measuring grids. Second, experiments on the specimens with various notch angles are carried out to compare with the analytical results. Experimental results are consistently smaller than the analytical results, with differences within 10 percent for the specimens with various notch angles and shapes.
