Authors

Tanner M. Leo

Senior Project Advisor

Mark Peyron

Document Type

Project

Publication Date

Spring 2022

Keywords

Thermoplastic Composite, Crystallization Kinetics, Process Modeling

Abstract

Thermoplastic composites are of rapidly growing interest to the aerospace industry due to their potential to save energy through processing or material through recycling or repair. Process modeling is a computational-based approach for predicting material behavior and quality outcomes for different manufacturing processes. In effect, process modeling reduces both the risk and cost associated with manufacturing composite parts. Process modeling of thermoplastic composites is largely still ill-defined, although a model structure has been defined and validated with carbon fiber poly(ether ether ketone) (CF/PEEK) composite prepreg. Carbon fiber poly(ether ketone ketone) (CF/PEKK) was subjected to a series of characterization experiments CF/PEKK and neat PEKK samples were characterized by modulated differential scanning calorimetry (MDSC), dynamic mechanical analysis (DMA), rheology, and guarded heat flow metrology. Data were analyzed and prepared for building the constitutive models for crystallization and melting kinetics, specific heat capacity, stress relaxation, modulus development, flow characteristics, thermal conductivity, coefficient of thermal expansion, and density. Challenges associated with carrying out a full suite of characterization experiments were identified and the material behavior observed for CF/PEKK was described, providing a framework for characterizing high-performance thermoplastic prepreg for process modeling.

Department

Engineering and Design

Subjects - Topical (LCSH)

Thermoplastic composites; Crystallization; Mechanics, Analytic

Genre/Form

essays

Type

Text

Rights

Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this document for commercial purposes, or for financial gain, shall not be allowed without the author’s written permission.

Language

English

Format

application/pdf

Included in

Engineering Commons

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