Analysis of stress fields in composite laminates with interior cracks

Composites ◽  
1980 ◽  
Vol 11 (1) ◽  
pp. 52
Keyword(s):  
Composite Laminates ◽  
Stress Fields

3D Thermal Stresses in Composite Laminates Under Steady-State Through-Thickness Thermal Conduction

2020 ◽  
Vol 12 (06) ◽  
pp. 2050065
Author(s):  
Yan Guo ◽  
Yanan Jiang ◽  
Ji Wang ◽  
Bin Huang
Keyword(s):  
Steady State ◽  
Plane Stress ◽  
Composite Laminates ◽  
Stress Function ◽  
Thermal Conduction ◽  
Thermal Stresses ◽  
Virtual Work ◽  
Ritz Method ◽  
Stress Fields ◽  
Stress Functions

In this study, 3D thermal stresses in composite laminates under steady-state through thickness thermal conduction are investigated by means of a stress function-based approach. One-dimensional thermal conduction is solved for composite laminate and the layerwise temperature distribution is calculated first. The principle of complementary virtual work is employed to develop the governing equations. Their solutions are obtained by using the stress function-based approach, where the stress functions are taken from the Lekhnitskii stress functions in terms of in-plane stress functions and out-of-plane stress functions. With the Rayleigh–Ritz method, the stress fields can be solved by first solving a standard eigenvalue problem. The proposed method is not merely computationally efficient and accurate. The stress fields also strictly satisfy the prescribed boundary conditions validated by the results of finite element method (FEM) results. Finally, some of the results will be given for discussion considering different layup stacking sequences, thermal conductivities and overall temperature differences. From the results, we find that the thermal conductivity greatly affects the stress distributions and peak values of stresses increase linearly for the present model. The proposed method can be used for predicting 3D thermal stresses in composite laminates when subjected to thermal loading.

Stress fields in general composite laminates

AIAA Journal ◽  
1996 ◽  
Vol 34 (12) ◽  
pp. 2604-2608 ◽  
Author(s):  
G. Davi
Keyword(s):  
Composite Laminates ◽  
Stress Fields

Generalized Free-Edge Stress Analysis Using Mechanics of Structure Genome

2016 ◽  
Vol 83 (10) ◽  
Author(s):  
Bo Peng ◽  
Johnathan Goodsell ◽  
R. Byron Pipes ◽  
Wenbin Yu
Keyword(s):  
Stress Analysis ◽  
Composite Laminates ◽  
Three Dimensional ◽  
Free Edge ◽  
Stress Fields ◽  
Element Analysis ◽  
Cross Sectional ◽  
Edge Stress ◽  
Out Of Plane ◽  
Sectional Analysis

This work reveals the potential of mechanics of structure genome (MSG) for the free-edge stress analysis of composite laminates. First, the cross-sectional analysis specialized from MSG is formulated for solving a generalized free-edge problem of composite laminates. Then, MSG and the companion code SwiftComp™ are applied to the free-edge stress analysis of several composite laminates with arbitrary layups and general loads including extension, torsion, in-plane and out-of-plane bending, and their combinations. The results of MSG are compared with various existing solutions for symmetric angle-ply laminates. New results are presented for the free-edge stress fields in general laminates for combined mechanical loads and compared with three-dimensional (3D) finite element analysis (FEA) results, which agree very well.

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