Events Calendar

AME Department Seminar

Speaker: Anthony M. Waas, Felix Pawlowski Collegiate Professor of Aerospace Engineering, Professor of Mechanical Engineering (courtesy), University of Michigan

Talk Title: Integrated Computational Materials Science, Manufacturing and Engineering of Textile Polymer Composites

Abstract: Composite materials and structures made of textile architecture are a rapidly emerging, cost-effective technology for the manufacturing of large aerospace structures. At the Composite Structures Laboratory at UM, an integrated computational framework for textile polymer composites that includes a novel polymer curing model, has been developed and used in connection with modeling the manufacturing process of textile composites. The model is based on the notion of polymer networks that are continuously formed in a body of changing shape due to changes in temperature, chemistry, and external loads. Nonlinear material behavior is incorporated through nonlocal continuum damage mechanics that preserves mesh objectivity in finite element based calculations that go beyond maximum loads. The integrated model is applied to the curing of a textile composite made from carbon fiber tows and a thermoset polymer. The mechanical and chemical properties are measured during curing using concurrent Brillouin and Raman light scattering. It is shown that significant internal stresses can develop during cure. The effect of these stresses on the manufactured part performance, when subsequent service loads are applied, is evaluated and found to be in agreement with experimental observations. Subsequently, an engineering approach to evaluating the compressive strength of braided textile composites, while accounting for the manufacturing induced stresses, is developed and validated against experiments.

Host: Prof. L. Redekopp

More Info: http://ame-www.usc.edu/seminars/index.shtml#upcoming

Location: Hedco Neurosciences Building (HNB) - 100

Audiences: Everyone Is Invited

Contact: April Mundy

Event Link: http://ame-www.usc.edu/seminars/index.shtml#upcoming