613 Numerical Modelling of Composite Materials

Reza Vaziri, The University of British Columbia
Ofir Shor, Rafael Advanced Defense Systems LTD
Simcha Srebnik, Technion Israel Institute of Technology
The use of composite materials in advanced engineering applications is growing rapidly due to their excellent specific strength, fatigue and corrosion resistance. Furthermore, composite materials can be molded into complex shapes, with their mechanical properties tailored and optimized to best fit their application. The need to develop lighter and yet stronger structures, together with the accumulated knowledge related to their processing and structural design, has enabled composites to become widely used in numerous industrial applications requiring peak performance and superior reliability.
Despite their benefits, composites pose great engineering challenges. Their heterogeneous nature, which often consists of thin layers (plies) of relatively high-strength anisotropic material stacked to the required thickness using relatively weak bonding materials (matrix), leads to complex mechanical behavior exhibited at various stages of the material’s life-cycle. The evolution of the matrix material properties during processing combined with the mismatch between the properties of the matrix and the reinforcement will generally lead to residual stresses within the processed part, thus affecting its load-bearing capabilities in service. These residual stresses lead to dimensional instabilities in the form of spring-back and warpage of the manufactured part which together with other process-induced defects such as porosity and wrinkling that reduce mechanical properties of the material need to be considered in the design of composite components. Composite materials are generally anisotropic in nature, exhibiting a unique mechanical behavior during their service life. Failure of composite materials is often characterized by the onset and progression of distinct damage mechanisms that interact with each other and yield a complex material behavior during loading.
The advances in knowledge and computational power have allowed sophisticated numerical tools and methods to be applied in order to investigate, predict and describe the behavior of composite materials at various stages, from manufacturing to service, and their ultimate failure.
This symposium is intended to cover all aspects of numerical simulations applied to composite materials at various scales, ranging from resin curing and cross linking, processing and manufacturing simulations, residual stress formation, structural design and optimization, damage and failure analysis, as well as numerical simulation of composites in engineering applications under both static and dynamic loading conditions. Researchers from academia and industry alike are welcome to present their work, engage and share ideas with other researchers who will take part in this exciting congress.