Author : Tzu-Chuan Chang (Ph.D.)
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Book Synopsis Evolution of Fiber Microstructure During Polymer Processing by : Tzu-Chuan Chang (Ph.D.)
Download or read book Evolution of Fiber Microstructure During Polymer Processing written by Tzu-Chuan Chang (Ph.D.) and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discontinuous fiber-reinforced polymers play a significant role in the automotive industry due to their lightweight properties and excellent mechanical performance with lower manufacturing costs. Since there are many unknowns regarding how fibers interact with the polymer matrix during polymer processing, it is crucial to understand how fiber orientation, fiber length, and fiber concentration affect the final part's properties. As few modeling techniques can accurately predict both fiber damage and fiber orientation during polymer processing, such as injection molding, a particle-level simulation is used in this study to predict the fiber motion in the polymer flow. In the particle level simulation, each fiber is represented as a chain of rods that experience hydrodynamic, interaction, and elastic effects. The simulation results were compared to simple shear flow experiments conducted in a Couette Rheometer to validate the model's approach. In addition to the particle-level simulation, a modified breakage model developed in the Polymer Engineering Center, UW-Madison, was implemented as a post-processing tool for injection molding simulation using Moldex3D to find the optimum value for predicting fiber damage in the polymer process. The model was validated with different fiber content materials as well as different part geometries and processing conditions. A new form of stress-induced fiber breakage model was proposed to allow more accurate predictions on fiber attrition in polymer processing.