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Analysis of Composite Structures Using the 3-D Global/3-D Local Method

Department of Bioengineering, Clemson University, Clemson, SC 29634

S. B. BIGGERS, Jr.

Department of Mechanical Engineering, Clemson University, Clemson, SC 29634

R. A. Latour, Jr.

Department of Bioengineering and, Materials Science & Engineering Program, Clemson University Clemson, SC 29634

A global/local (G/L) method is presented for the analysis of composite structures that need to be modeled in 3-D. The method employs a modified version of effective stiffnesses specification at the global level such that both extensional and flexural behavior of symmetric composite structures are replicated. A numerical verification problem of a quasi-isotropic composite cantilever beam with mid-beam cut-outs under edge pressure load is used to determine the efficiency and accuracy of the proposed 3-D Global/3-D Local method. The effect of global stiffness specification on the local solution is explored. Results indicate that the proposed G/L method may be over 20 times more efficient while the error in both in-plane and interlaminar stresses are less than 5% when compared to the predictions of a highly refined finite element model used as a control.

Journal of Reinforced Plastics and Composites, Vol. 16, No. 4, 353-371 (1997)
DOI: 10.1177/073168449701600406


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