Elasto-Plastic Stress Analysis in Silicon Carbide Fiber Reinforced Magnesium Metal Matrix Composite with a Square Hole

Fuat Okumuş

doi:10.3390/mca16010216

Abstract

In the present study an elastic-plastic stress analysis is carried out for long silicon carbide fiber reinforced magnesium metal matrix composite with a square hole by using finite element technique. Composite material is manufactured by using molds under a pressure of 35 MPa and heating up to 550 0C by electrical resistance. The laminated plates with square hole consist of four layers and bonded symmetrically. Each layer with constant thickness is meshed into 48 elements and 228 nodes with simply supported. The expansion of plastic zone and residual stress are determined in the symmetric cross-ply and angle-ply laminated plates for small deformations. The load is increased by 0.01 MPa at each step . Iteration numbers are chosen as 150, 300 and 600. The resılts show that the intensity of the residual stresses is maximum near the open square hole and the yield points in symmetric laminates are higher than those in antisymmetric laminates.The plastic regions at the plate edges expand in the direction of the fiber, but at the border of the hole expand toward the diagonal of the hole.

Highlights

Metal-matrix composites consist of several layers of unidirectionally reinforced fibrous composite laminate which have different in-plane orientations
Nine node square finite elements were used in the laminated plates to obtain the yield points of the laminated composite plates, the expansion of plastic regions, and residual stresses
The metal-matrix composite plate with square hole is assumed to be under uniform axial in-plane loads along the square edges and the square hole is unloaded

Summary

1.INTRODUCTION

Metal-matrix composites consist of several layers of unidirectionally reinforced fibrous composite laminate which have different in-plane orientations. Using the finite element method for computing in-plane stress, Uenaya and Rewood [ 3 ] determined the shear buckling of square plates with holes by the aid of the Rayleigh-Ritz method.Chou et al [ 4 ] reviewed the work on fibre-reinforced metal-matrix composites involving fabrication methods, mechanical properties, secondary working techniques and interfaces. The volume fractions were calculated using eddy current measurements made on a wide range of silicon carbide particulate reinforced aluminum matrix composite extrusions.Pomies and Carlsson [ 7 ] carried out micromechanical finite element analysis of rigidity and strength of transverse tension loaded continous fiber composites and compared their results with experimental data for dry and wet glass-epoxy, carbonepoxy composites. A silicon carbide fiber reinforced magnesium metal-matrix symmetric laminated composite plates having square holes are loaded.

MATHEMATICAL FORMULATION

FINITE ELEMENT MODEL

NUMERICAL RESULTS AND DISCUSSIONS

PRODUCTION OF LAMINATED PLATE

CONCLUSIONS

7.REFERENCES