A simulation framework for predicting process-induced distortions for precise manufacturing of aerospace thermoset composites

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2021-11-01 DOI:10.1016/j.compstruct.2021.114465

Neoklis Traiforos , Thomas Turner , Patrik Runeberg , Daoud Fernass , Dimitrios Chronopoulos , Florian Glock , Gerd Schuhmacher , Daniel Hartung

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引用次数: 10

Abstract

The choice of a suitable material model to simulate process induced distortions is important in order to achieve a right first time approach in the design of new moulds. This work investigates the ability of the Cure Hardening Instantaneously Linear Elastic (CHILE) model and a linear viscoelastic material model to predict process induced distortions of an aerospace composite frame. The material models were coupled with a cure kinetics model and a chemical shrinkage model in order to capture the multi-physics phenomena that take place during the curing process. The modelling of the viscoelastic behaviour of the resin is performed with the use of a generalized Maxwell model. A novel methodology is applied for shifting the relaxation times of the composite based on its temperature and degree of cure. It is shown that the viscoelastic model more accurately predicts the measured distortions due to its ability to account for stress relaxation.

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航空航天热固性复合材料精密制造过程变形预测的仿真框架

选择合适的材料模型来模拟工艺引起的变形是重要的，以便在新模具的设计中实现正确的第一次方法。这项工作研究了固化硬化瞬时线性弹性(智利)模型和线性粘弹性材料模型预测航空复合材料框架的工艺引起的变形的能力。为了捕捉固化过程中发生的多物理场现象，材料模型与固化动力学模型和化学收缩模型耦合在一起。树脂的粘弹性行为的建模是用广义麦克斯韦模型进行的。采用一种新颖的方法，根据复合材料的温度和固化程度来改变其弛豫时间。结果表明，粘弹性模型由于其考虑应力松弛的能力，可以更准确地预测测量的变形。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.