Abstract
In this paper, we discuss the assessment of the margins of safety (MOS) for engineered structures (buildings, bridges, machines and aircraft). With respect to metallic structures the MOS are primarily a function of the observed yield stress of the metal (critical property of the constitutive material). With continuous fiber reinforced polymer composites (composites in this paper) such a crisp measurement of the “yield stress” is not available. The result has been an empirical test-intensive building block approach to the assessment of the MOS for composite structure. However, the capability to use the critical properties of the constitutive materials of the composite system to evaluate the MOS of the composite structure is now possible (explicit MOS assessment). Such an approach will lead to significant reductions in cost and time-to-design as well as a practical means towards expanding the design space. The measurement of the critical measures, de-homogenization of homogenous strain states and classical convergence of the numerical solutions involved are discussed in detail. Finally, integrating generalized finite elements into the analysis process will allow for rapid and efficient assessment of the MOS for global structures.
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Gosse, J.H., Sharp, E.J. (2019). Explicit Margin of Safety Assessment of Composite Structure. In: Griebel, M., Schweitzer, M. (eds) Meshfree Methods for Partial Differential Equations IX. IWMMPDE 2017. Lecture Notes in Computational Science and Engineering, vol 129. Springer, Cham. https://doi.org/10.1007/978-3-030-15119-5_3
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DOI: https://doi.org/10.1007/978-3-030-15119-5_3
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