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原文传递 PNNL Technical Support to the Implementation of EMTA and EMTA-NLA Models in Autodesk Moldflow Packages.

题名：	PNNL Technical Support to the Implementation of EMTA and EMTA-NLA Models in Autodesk Moldflow Packages.
作者：	Nghiep Nguyen, B.; Wang, J.
关键词：	Automotive Industry; Carbon Fiber Reinforced Plastics; Composite Materials; Design; Durability; Eshelby-mori-tanks-approach(emta); Implementation; Injection Molding; Mechanical Properties; Microstruct
摘要：	Recently, long-fiber thermoplastic (LFT) composites have attracted great interest within the automotive industry since these materials offer much better structural performance (e.g. higher elastic moduli, strength, and durability) than their short-fiber analogues, and they can be processed through injection molding with some specific tool design. However, to be able to compute the properties of injection molded LFTs, there is an important need to develop process and property prediction models as well as computational tools to predict the microstructure and resulting mechanical properties of these composites. Under Phase II of the Predictive Engineering project funded by the Lightweight Materials program in the DOE Office of Vehicle Technologies, Pacific Northwest National Laboratory (PNNL) developed the property prediction (constitutive) models for injection-molded LFTs that describe the linear and nonlinear behaviors of these materials. In the meantime, PNNL built the computational capabilities named EMTA (Eshelby-Mori-Tanaka Approach) and EMTA-NLA (Eshelby-Mori-Tanaka Approach to Non-Linear Analysis) that have implemented the developed constitutive models for LFTs. The models explore the standard and improved Eshelby-Mori-Tanaka approaches that consider elastic fibers distributed in a thermoplastic matrix whose behavior can be linear or nonlinear depending on the loading prescribed to the composite. In an effort to transfer the technologies developed under the Predictive Engineering project to the American automotive and plastics industries, PNNL has obtained the approval of the DOE Office of Vehicle Technologies to provide Autodesk, Inc. with the technical support for the implementation of the basic property prediction models of EMTA and EMTA-NLA in the Autodesk Moldflow packages.
报告类型：	科技报告