Theoretical and Experimental Mechanisms of Toughening in Multi-phase Materials

by Douglas S. Cairns, Hercules Advanced Materials and, Systems Co, Magna, United States,

Document Type: Proceeding Paper

Part of: Mechanics Computing in 1990's and Beyond


Multi-phase materials are an important class of materials being developed for aerospace primary structural applications. Multi-phase materials are those materials consisting of two or more distinct phases. These phases play a role in determining the mechanical properties of the material. Specifically, if the sizes of the individual phases are sufficiently large such that they cannot be ignored with respect to fracture, analyses which account for the performance of these phases are necessary. Advanced composite laminates are an important class of multi-phase materials. In laminated composites, it is the interply region between plies, which accounts for the mechanical properties with respect to out-of-plane loading. Thus, while it is necessary to account for the mechanical properties of the individual plies, it is necessary to model the interply region for understanding these materials. In this study, models are developed to specifically account for the performance of the interply region.

Subject Headings: Composite materials | Laminated materials | Construction materials | Material properties | Mechanical properties | Cracking | Material mechanics | Load factors

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