Effect of microstructural damage on ply stresses in laminated composites
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A continuum damage mechanics framework is utilized herein to develop laminate equations for layered orthotropic composites undergoing microstructural damage. The theory is capable of modelling the effects of both matrix cracks and interply delaminations on both the internal forces and moments resulting at the laminate level. The two damage modes are accounted for via second order tensor valued internal state variables which account for the locally averaged kinematics of microcracking in each damage model. It is shown that the model may be utilized to determine the effects of microcracking on ply level stresses, and this is demonstrated for several example cases.
author list (cited authors)
Allen, D. H., Nottorf, E. W., & Harris, C. E.