Novel thermomechanical characterization for shrinkage evolution of unidirectional semi-crystalline thermoplastic prepregs (PPS/CF) in melt, rubbery and glassy states

被引：0

作者：

Golzar M. ^{[1
]}

Sinke J. ^{[2
]}

Abouhamzeh M. ^{[3
]}

机构：

[1] Faculty of Mechanical Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran

[2] Department of Aerospace Structures & Materials, AE, Technical University of Delft, Kluyverweg1, Delft

[3] Institute of Aircraft Design and Lightweight Structures, Technische Universität Braunschweig, Hermann-Blenk-Str. 35, Braunschweig

来源：

Composites Part A: Applied Science and Manufacturing | 2022年 / 156卷

关键词：

A; Prepreg; A. Thermoplastic resin; B; Thermomechanical; D. Physical methods of analysis;

D O I：

10.1016/j.compositesa.2022.106879

中图分类号：

学科分类号：

摘要：

Shrinkages, distortions and high residual stresses in the thermoplastic composite parts are induced due to high processing temperature, anisotropy, and fiber–matrix shrinkage mismatch. In this paper the shrinkages have been investigated experimentally and modeled by thermo-mechanical constitutive equations for PolyPhenylene Sulfide (PPS) and the unidirectional Carbon Fiber (PPS/CF) composite prepreg. The thermal shrinkage and the crystallization shrinkage were retrieved from Thermal Mechanical Analysis and compared to a Pressure specific volume Temperature diagram. To describe the crystallization shrinkage in the cooling process accurately, the crystallization kinetics of PPS was evaluated using Differential Scanning Calorimetry. The temperature-dependent elastic modulus was measured by a shear rheometer to formulate a new constitutive model. The mathematical model for shrinkage was validated by a press consolidated [0]12 laminate and unbalanced laminates in four lay-ups. The thermo-mechanical model results presented here provide significant rules for the thermomechanical and shrinkage predictions for the industrial applications of thermoplastic composite. © 2022 Elsevier Ltd

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