Non-Linear Analysis Models for Design of Carbon-Carbon Components (MSC P4172) Navy SBIR FY2014.1 Sol No.: Navy SBIR FY2014.1 Topic No.: N141-082 Topic Title: Non-Linear Analysis Models for Design of Carbon-Carbon Components (MSC P4172) Proposal No.: N141-082-0232 Firm: Materials Sciences Corporation 135 Rock Road Horsham, Pennsylvania 19044 Contact: Carol Meyers Phone: (215) 542-8400 Web Site: www.materials-sciences.com Abstract: Efficient use of two-dimensional (2D) and three-dimensional (3D) woven carbon-carbon (C/C) composite materials used in many thermal protection applications requires that onset and development of material non-linearity be accounted for during design. The theoretical framework and computational infrastructure to implement nonlinear material models into the finite element analysis code ABAQUS exists at Materials Sciences Corporation (MSC), including both stress-based and/or fracture-based failure analysis methods. Post-damage onset material response in the stress- or strain based ply level composite failure modeling approach is approximated as piece-wise linear and the continuum level response for the fiber bundle and woven composite is defined analytically based on homogenization theory. The fracture-based approach is referred to as the discrete damage space homogenization method, or DDSHM, since the damage state within a representative volume element is discretely modeled. The DDSHM approach can also calculate, directly and in a theoretically rigorous manner, changes in thermal expansion coefficients and thermal conductivity as damage evolves, which may be important for C/C materials. The link between constituent material properties, micro-structural features and measured response will be established under this program thus providing a path to a validated micromechanics modeling approach that can be used to support thermal protection component design. Benefits: MSC expects that this SBIR program will yield a methodology, user guidelines and software package for simulating the thermo-mechanical response of 2D and 3D C/C materials that has been validated through comparison with experimental data. Once validated, these analysis methods have the potential to enable improved design of space, air transport and automotive applications that utilize C/C materials. Return