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MAE PhD Defense – Shengqi Zhang
August 16, 2016 @ 10:00 am
Title: An Eulerian Cutting Model for Fiber Reinforced Polymers (Advisor: Dr John S. Strenkowski)
Date: August 16, 2016
Time & Location: 10:00 AM EB3-3235
An Eulerian numerical cutting model is presented that simulates orthogonal cutting of Uni-Directional Fiber-Reinforced Polymer (UD-FRP) composites. The continuous finite element method and the discontinuous Galerkin method are combined to solve the governing equations. An equivalent homogeneous material for the work-piece is implemented with a progressive damage model. The curvature in the work-piece material is computed and therefore local fiber bending effects are accounted for. Good agreement was found between the predicted cutting forces and subsurface damage and published experimental observations. Sensitivity analyses for the model are also conducted considering the convergence characteristics, the elementary effects of parameters and the influence of the machining conditions. It was found that the fiber orientation has a dominating influence on both the cutting forces and subsurface damage.