A Method of Predicting the Nonlinear Behavior of Laminated Composites

Abstract

This paper presents an analytical technique for determining the stress-strain response up to ultimate laminate failure for a laminated composite consisting of orthotropic lamina with nonlinear stress-strain behavior. The procedure, which has been programmed for a digital computer, will produce a laminate stress-strain curve up to ultimate failure. The technique is restricted to the prediction of ultimate strength for plane anisotropic laminates with midplane symmetry sub jected to biaxial membrane loads. Comparisons are made between analytical predictions and experimental results. The basic concepts of ultimate and limit strength design as applied to an advanced com posite structure are discussed.

Verification and Validation of a Three-Dimensional Orthotropic Plasticity Constitutive Model Using a Unidirectional Composite

“…Vaziri et al [3] categorize the continuum mechanics approaches into four groups-(i) nonlinear elasticity theories; (ii) damage theories coupled with elasticity; (iii) classical incremental plasticity theory; and (iv) endochronic plasticity theory. Examples of these approaches and models can be found in [4][5][6][7][8][9]. From the viewpoint of engineering design, models should be driven with varying levels of input depending on the complexity of the composite so that the material model can be tailored for the required response.…”

Three-Dimensional Inelastic Finite Element Analysis of Laminated Composites

“…Tsai [10] presented a means of including thermal loading based on room temperature thermal coefficients. Petit and Waddoups [11] developed a method of nonlinear analysis to failure. Symmetric laminates subject to biaxial loads were modeled.…”

Reliability assessment of post-buckling compressive strength of laminated composite plates and stiffened panels under axial compression

“…The early work to investigate the post-buckling strength of laminated composite structures was made by Petit and Waddoups (1969). They developed a gradual unloading model to simulate the property degradation of laminated composite plates subjected to axial compression until the collapse load is reached.…”