Modeling the stiffness and strength of aerospace structural elements

C. Kassapoglou     Delft University of Technology, Delft, The Netherlands


The classical method for obtaining the stiffness of composite laminates is presented highlighting stretching, bending, and bending/stretching coupling behavior. The resulting stresses and/or strains are then combined in failure criteria. Different criteria are presented along with some of their drawbacks. The discussion is extended to notched strength of laminates by briefly treating laminates with holes. Woven composites are also introduced with a brief overview of methods to obtain stiffness and strength. Issues related to some defects such as porosity or delaminations that may be present in composite ...

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