Temperature effects on the time dependent viscoelastic behaviour of carbon/epoxy composite materials: Application to T700GC/M21

被引：11
作者：
Berthe, Julien [1 ]
Brieu, Mathias [2 ,3 ]
Deletombe, Eric [1 ]
Portemont, Gerald [1 ]
机构：
[1] ONERA French Aerosp Lab, F-59045 Lille, France
[2] Univ Lille Nord France, F-59000 Lille, France
[3] LML, ECLille, F-59650 Villeneuve Dascq, France
来源：
MATERIALS & DESIGN | 2014年 / 62卷
关键词：
Polymer-matrix composites; Mechanical properties; Mechanical testing; Temperature dependency; Strain-rate dependency; Dynamic testing; HIGH-STRAIN RATE; MECHANICAL-BEHAVIOR; POLYMERS; IDENTIFICATION;
D O I：
10.1016/j.matdes.2014.05.025
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, strain rate and low temperature dependencies of the viscoelastic behaviour of the T700GC/M21 composite material are characterised and analysed. Dynamic tests for various environmental temperatures are performed on hydraulic jack equipped with an environmental chamber. Three speeds, between 8.33 . 10(-4) m s(-1) and 0.5 m s(-1), at three temperatures (20 degrees C, -40 degrees C and -100 degrees C) are tested. The increase of the shear modulus with the decrease of the temperature is more pronounced between -40 degrees C and -100 degrees C than between 20 degrees C and -40 degrees C. Complementary DMA (Dynamic Mechanical Analysis) tests are performed on the M21 epoxy resin to characterise the viscoelastic behaviour of the matrix which contributes to the viscoelastic behaviour of the laminate. DMA tests highlight a low temperature transition called beta transition (-67 degrees C for the 1 Hz test) which is responsible of the larger increase of the storage modulus, for the epoxy matrix, between -40 degrees C and -100 degrees C. Consequently the beta transition could also be at the origin, for the composite, of the observed larger increase of the shear modulus with respect to the strain rate, for strain rates higher than 10 s(-1). (C) 2014 Elsevier Ltd. All rights reserved.
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收藏
页码：241 / 246
页数：6
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