Effect of orientation angle of elliptical hole on residual stresses and expansion of plastic zone in thermoplastic composite plates under in-plane loading

In this study, residual stress variations and expansion of plastic zone of woven steel fiber reinforced laminated thermoplastic composite plates with central elliptical hole which is subjected to in-plane loading are investigated for different loads. Numerical simulation is performed using a commercial packet programme ANSYS. To investigate the effects of orientation angle of elliptical hole in the composite laminated plate under various in-plane loads, elliptical hole is rotated from 0 degrees to 90 degrees by 15 degrees increments counterclockwise. The in-plane loads are chosen as 5.5 MPa, 6.0 MPa and 6.5 MPa. Laminated plates are composed of [0/+/- 30/+/- 45/90](2) fiber orientation in symmetric and antisymmetric manner.