Evaluation of mechanical properties of laminated composites using Multi-Continuum Theory in ABAQUS

Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Mechanical Engineering.A thorough knowledge of the mechanical properties of composites is very important for proper design and optimization of structures in composite applications. Experimental determination of these properties like strength and modulus is prohibitively expensive, as there are unlimited combinations of matrix type, fiber type and stacking sequences possible. In this thesis, “Progressive Damage Modeling” is used to simulate the notched and un-notched tension and compression tests to obtain the strength and stiffness properties of composites. A quasi-isotropic layup (25/50/25) of Toray T700GC-12K-31E/#2510 unidirectional tape was used for the purposes of simulation. Previously obtained experimental data is used to validate the model. The commercially available software ABAQUS, is used for the simulations. A commercially available plug-in for ABAQUS, Helius:MCT, which utilizes the concepts of Multi-Continuum Theory (MCT), was employed to determine its suitability to accurately predict the loads and stiffnesses. Also, the suitability of Helius:MCT for certification, by analysis, of various laminates under various types of loading, was evaluated. It is shown that progressive damage modeling, of the notched and un-notched tension and compressive tests, using Helius:MCT, results in accurate prediction of failure loads and stiffnesses of laminates