Elastic-plastic stress analysis in stainless steel fiber reinforced aluminum metal matrix laminated plates by finite elements method

ABSTRACT Master Thesis ELASTIC-PLASTIC STRESS ANALYSIS IN STAINLESS STEEL FIBER REINFORCED ALUMINUM METAL MATRIX LAMINATED PLATES BY FINITE ELEMENT METHOD Gülşah ALAR Atatürk University Graduate School of Natural And Applied Sciences Department Of Mechanical Engineering Supervisor: Assco. Prof. Dr. Adnan ÖZEL (Stainless-steel fiber reinforced aluminum metal matrix laminated both with hole and without hole) in the composite plate has been applied to press in bottom and examined using the finite element method, 8-node Lagrangian interpolation. In the finite element solution Newton-Raphson method was used. A computer program has been written by using characteristics of shell 91 element in ANSYS package programme. The plastic strain at the model has been observed laminated both with hole (on various diameter dimensions) and without hole on various orientation angles. Maximum plastic-strain occured in the middle of the plates without hole while it appeared around the hole in the plates with hole. At the same loading conditions, for the plates without a hole, it was observed that the maximum equivalent stress along x-axis occured in the middle of the plate for (0/90/90/0)s orientation angle, while it starts shifting from the center to the edges on the x-axis for (30/60/30/60)s and (45/-45/45/-45)s orientation angles.Similarly, at the same loading conditions for the plates with a hole it was observed that the maximum equivalent stress along x-axis occured around the hole in the middle of the plate for the (0/90/90/0)s orientation angle, while it starts decreasing from the center to the edges on the x-axis for (30/60/30/60)s and (45/-45/45/-45)s orientation angles. 2002, 137 page Keywords: Elastic-plastic analysis, Finite element Method, Metal matrix composite, Laminated plate, Plastic Strain. 11