THE IOSIPESCU INPLANE SHEAR TEST APPLIED TO COMPOSITES - A NEW APPROACH BASED ON DISPLACEMENT FIELD PROCESSING

A new approach to the Iosipescu in-plane shear test is presented. By u sing the principle of virtual work, a formula is derived that links th e in-plane shear modulus to the global applied load, geometric paramet ers and a contour integral of a function of the longitudinal and trans verse displacements. Numerical simulations based on finite element cal culations are performed in order to validate the process. The results in terms of shear moduli are better than 1 % for different composite m aterials and coupon geometries. A numerical error simulation perturbin g the displacement values demonstrates the stability and therefore the viability of the method.