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oai:www.ideals.illinois.edu:2142/72196 2023-07-11 col_2142_5131 col_2142_14770 com_2142_5130 com_2142_3518 com_2142_234

Pecknold, D.A., Rahman, Shahzad 2014-12-17T21:05:03Z 2014-12-17T21:05:03Z 10000-01-01 1992 1992 A procedure for three-dimensional nonlinear material modelling of fiber-reinforced laminated composites is presented. The material modelling procedure has a two-level hierarchical structure. At the bottom level, constitutive information about the fiber and the matrix phases are synthesized using a micromechanical model to yield the effective stress-strain response of a unidirectional lamina. At the top level, a three-dimensional lamination scheme is employed which assembles the laminae within a sublaminate, and delivers the effective stress-strain response of the sublaminate. Local stresses and strains in a lamina or in fiber and matrix phases can be recovered from the effective values at any stage. The material modelling procedure enables the use of standard displacement-based finite elements. The matrix material is characterized using nonlinear-elastic Ramberg-Osgood relations. Micromechanical failure criteria are used for determining various modes of failure, including compression kink-banding. The accuracy of the micromechanical model is demonstrated by comparing its predictions with results from other micromechanical models and experimental data. Examples are also presented for laminated structures; the results are in good agreement with analytical and experimental results available in the literature. Made available in DSpace on 2014-12-17T21:05:03Z (GMT). No. of bitstreams: 1 9305661.pdf: 5971486 bytes, checksum: 8ad9b1605af87a67bfc0bb3bc3dae492 (MD5) Previous issue date: 1992 Embargo set by: Seth Robbins for item 72364 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 181 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1992. http://hdl.handle.net/2142/72196 (UMI)AAI9305661 Applied Mechanics Engineering, Civil Engineering, Materials Science Micromechanics-Based Analysis of Fiber-Reinforced Laminated Composites text Civil Engineering Civil Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.