Author(s)

M. Palantera & M. Klein

Abstract

Constant and variable loads in failure analyses of composite laminates M. Palantera," M. Klein* * Helsinki University of Technology, Laboratory of Light Structures, FIN- 02 150 Espoo, Finland Netherlands ABSTRACT A method for assessing the criticality of applied loads in failure analyses of composite laminates is described. The applied load vector is divided into a constant and variable part. The criticality of the combined loading condition is studied with respect to changes in the magnitude of the variable loading. When sets of unrelated loads are applied simultaneously, this approach gives more realistic results than if the resultant load vector as a whole is considered. The use of factors of safety with the method is discussed. A procedure to solve reserve factors and margins of safety based on quadratic failure criteria is outlined. The approach is illustrated with examples. INTRODUCTION The main goal of failure analyses is to evaluate the criticality of loads applied to

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