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RISFailure Model for Rate-Dependent Polymer Matrix Composite Laminates under High-Velocity Impact
Publisher: American Society of Civil Engineers
Abstract: A modified Hashin failure model is developed to characterize different failure modes related to high-velocity impact of composite laminates. Hashin’s compressive fiber failure mode has been extended to consider the shear ...
Ballistic Impact and Crashworthiness Response of Aerospace Structures
Publisher: American Society of Civil Engineers
Dynamic Testing and Characterization of Woven/Braided Polymer Composites: A Review
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Woven and braided polymer composite structures are used in many primary aerospace applications because of their superior behavior under dynamic loading conditions and light weight. Characterization ...
Implementation of an Associative Flow Rule Including Hydrostatic Stress Effects into the High Strain Rate Deformation Analysis of Polymer Matrix Composites
Publisher: American Society of Civil Engineers
Abstract: A previously developed analytical formulation has been modified in order to more accurately account for the effects of hydrostatic stresses on the nonlinear, strain rate dependent deformation of polymer matrix composites. ...
Strain Rate Sensitivity of Epoxy Resin in Tensile and Shear Loading
Publisher: American Society of Civil Engineers
Abstract: The mechanical response of E-862 and PR-520 resins is investigated in tensile and shear loadings. At both types of loading the resins are tested at strain rates of about
Finite-Element Model for Failure Study of Two-Dimensional Triaxially Braided Composite
Publisher: American Society of Civil Engineers
Abstract: A new three-dimensional finite-element model of two-dimensional, triaxially braided composites is presented in this paper. This mesoscale modeling technique is used to examine and predict the deformation and damage observed ...
Modification of a Macromechanical Finite Element–Based Model for Impact Analysis of Triaxially Braided Composites
Publisher: American Society of Civil Engineers
Abstract: A macrolevel finite element–based model has been developed to simulate the mechanical and impact response of triaxially braided polymer matrix composites. In the analytical model, the triaxial-braid architecture is simulated ...
Approximation of Nonlinear Unloading Effects in the Strain Rate Dependent Deformation Analysis of Polymer Matrix Materials Utilizing a State Variable Approach
Publisher: American Society of Civil Engineers
Abstract: An experimental and analytical program is carried out to explore key behaviors in the loading and unloading behavior of polymers. Specifically, the effects of strain rate and hydrostatic stresses on the nonlinear portions ...
Characterization of Damage in Triaxial Braided Composites under Tensile Loading
Publisher: American Society of Civil Engineers
Abstract: Carbon fiber composites that utilize flattened, large tow yarns in woven or braided forms are being used in many aerospace applications. The complex fiber architecture and large unit cell size in these materials present ...
Single Ply and Multi-Ply Braided Composite Response Predictions Using Modified Subcell Approach
Publisher: American Society of Civil Engineers
Abstract: In this work, the modeling of triaxially braided composites was explored through a subcell approach using an improved semianalytical discretization scheme. The unit cell of the braided composite was divided into four unique ...