Elastic–plastic stress analysis and expansion of plastic zone in clamped and simply supported thermoplastic-matrix laminated plates with square hole

2004 ◽  
Vol 64 (9) ◽  
pp. 1147-1166 ◽  
Author(s):  
Nurettin Arslan ◽  
Nuray Arslan ◽  
Fuat Okumus
Keyword(s):  
Plastic Zone ◽  
Stress Analysis ◽  
Laminated Plates ◽  
Simply Supported ◽  
Elastic Plastic ◽  
Thermoplastic Matrix ◽  
Square Hole ◽  
Plastic Stress

Elasto-Plastic Finite Element Stress Analysis of Thermoplastic-Matrix Symmetric Cross-Ply Plates With Square Hole

2000 ◽  
Author(s):  
Nurettin Arslan ◽  
Aydın Turgut ◽  
Erol Sancaktar
Keyword(s):  
Finite Element ◽  
Stress Analysis ◽  
Orientation Angle ◽  
Shear Deformation Theory ◽  
Composite Plates ◽  
Laminated Plates ◽  
Thermoplastic Matrix ◽  
Lagrangian Finite Element ◽  
Square Hole ◽  
Plastic Stress

Abstract In this study, elasto-plastic stress analysis of symmetric cross-ply reinforced thermoplastic (PVC) matrix composite laminated plates with square hole is presented. A two-dimensional computer program is developed for elasto-plastic stress analysis of laminated plates by FEM. The thermoplastic matrix is reinforced using long stainless steel fibers. The composite plates are manufactured by using molds under the action of 2 MPa pressure, and heating up to 200 °C. The laminated plate with square hole consists of four reinforced layers bonded symmetrically in ([θ/-θ]2) cross-ply configuration. A first–order shear deformation theory, and nine node Lagrangian finite element method are used in analysis. The applied in-plane load, and the layer orientation angle are varied to obtain the corresponding variation of residual stresses, and the expansions of plastic regions for various cases.

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