The elasto-plastic stress analysis of the thermoplastic matrix plates with rectangular hole is carried out by using finite elements. A two-dimensional finite element computer program is developed for elasto-plastic stress analysis. Isoparametric quadratic element with nine nodes is used with Lagrange polynomial as an interpolation function. The spreads of the plastic zones and variations of the residual stresses are obtained in different orientation angles and loads. It is shown that the path around the hole location can be designed to decrease the stress concentrations. The results are presented in diagrams and compared with some of the relevant studies in the literature.
1. Shigley, J.E., 1986, Mechanical Engineering Design, Ist Metric Edition, McGraw-Hill, New York.
2.
2. Zienkiewicz, O.C., Valliappan, S. and King, I.P., 1969, International Journal for Numerical Methods in Engineering, Elasto-Plastic Solutions of Engineering Problems "Initial Stress," Finite Element Approach, Vol. 1, pp. 75-100.
3.
3. Kato, A., 1991, Journal of Strain Analysis, Design Equation for Stress Concentration Factors of Notched Strips and Grooved Shafts, Vol. 26, pp. 21-28.
4.
4. Owen, D.R. and Figuerias, J.A., 1983, Int. Journal for Numerical Methods in Engineering, Anisotropic Elasto-Plastic Finite Element Analysis of Thick and Thin Plates and Shells, Vol. 19, pp. 541-566.
5.
5. Karakuzu, R. and Sayman, O., 1994, Computers and Structures, Elasto-Plastic Finite Element Analysis of Orthotropic Rotating Discs with Holes, Vol. 51, pp. 695-703.
6.
6. Arslan, N., Turgut, A. and Sancaktar, E., 1993, Reliability, Stress Analysis, and Failure Prevention, The Effect of Fiber Type on the Level of Stress Concentration Created by U-Notches in Long-Fiber Composites Plates, ASME, DE-Vol. 55, pp. 125-134.
7.
7. Karakuzu, R., Ozel, A. and Sayman, O., 1997, Computers and Structures, Elasto-Plastic Finite Element Analysis of Metal Matrix Plates with Edge Notches, Vol. 63, pp. 511-558.
8.
8. Arslan, N., Turgut, A. and Sancaktar, E., 1996, Reliability, Stress Analysis, and Failure Prevention Issues in Fastening and Joining, Composite and Smart Structures, Numerical and FEAS Methods, Risk Minimization, ASME, Elasto-Plastic Finite Element Analysis of Isotropic Plates with U-Notches, DE-Vol. 92, pp. 45-58.
9.
9. Bathe, K.J., 1982, Finite Element Procedures in Engineering Analysis, Prentice-Hall Inc., Englewood Cliffs, New Jersey.
10.
10. Gibson, F.R., 1994, Principles of Composite Material Mechanics, McGraw-Hill International Edition.
11.
11. Dowling, N.E., 1993, Mechanical Behavior of Materials, Prentice-Hall, Englewood Cliffs, New Jersey.
12.
12. Okumus, F., 1998, The Elasto-Plastic Stress Analysis of the Perforated Composite Plates, Ph.D. thesis, Graduate School of Natural and Applied Science, Firat University, Elazig, Turkey.
