An efficient approach to determine compression after impact strength of quasi-isotropic composite laminates

作者：Esrail Fardin; Kassapoglou Christos^*

来源：Composites Science and Technology, 2014, 98: 28-35.

DOI：10.1016/j.compscitech.2014.04.015

• Laminate
• Impact behavior
• Modeling

An approach to obtain accurate estimates of the compression after impact strength of quasi-isotropic composite laminates is presented. The method makes use of the damage size and type calculations obtained previously, and models the damaged region as an area of concentric ellipses each with different stiffness and strength properties. A Rayleigh-Ritz approach is used to calculate the stresses in each of the inclusions representing the damage. Failure is predicted as material failure when local stresses exceed the load carrying capability of the elliptical inclusion in question. Once a portion of the damaged region fails, its load is redistributed to adjacent elliptical inclusions or sub-laminates. A progressive failure analysis follows until the entire laminate fails. This process requires an accurate prediction of the undamaged failure stress. Comparison with test results shows the analytical predictions to be in good agreement for the majority of cases.

• 出版日期2014-6-27