Abstract
This paper presents parameter-estimation methods developed to determine crack-tip field parameters in anisotropic elastic solids from full-field experimental data. The crack-tip field parameters of interest include not only stress intensity factors but also effective crack-tip positions. Two approaches that are based on least-squares method and conservation integrals were presented. In the approach based on the least-squares method, the Stroh representation of anisotropic elasticity was used to determine the coefficients in the asymptotic expansion of crack-tip fields in anisotropic solids. On the other hand, conservation integrals in fracture mechanics, such as J-integral, M-integral, Interaction integrals, were also used to extract the parameters including the effective crack-tip position. Both approaches were employed to analyze crack-tip displacement fields obtained by using Digital Image Correlation technique during translaminar fracture test of a fiber- reinforced polymer matrix composite. The applicability of homogeneous isotropic plane-elasticity models to translaminar fracture processes in laminated composite materials is also discussed.
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Hou, F., Hong, S. (2011). Extracting Crack-tip Field Parameters in Anisotropic Elastic Solids From Full-field Measurements Using Least-squares Method and Conservation Integrals. In: Proulx, T. (eds) Experimental and Applied Mechanics, Volume 6. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-0222-0_17
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DOI: https://doi.org/10.1007/978-1-4614-0222-0_17
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