Transverse crack initiation under combined thermal and mechanical loading of Fibre Metal Laminates and Glass Fibre Reinforced Polymers

26th International Cryogenic Engineering Conference & International Cryogenic Materials Conference 2016

材料科学;物理学

Van De Camp, W.^1 ; Dhallé, M.M.J.^1 ; Warnet, L.^2 ; Wessel, W.A.J.^1 ; Vos, G.S.^2 ; Akkerman, R.^2 ; Ter Brake, H.J.M.^1

Energy, Materials and Systems, Faculty of Science and Technology, University of Twente, Postbus 217, Enschede

7500 AE, Netherlands^1

Production Technology, Faculty of Engineering Technology, University of Twente, Postbus 217, Enschede

7500 AE, Netherlands^2

关键词: Classical laminate theory;    Differential thermal contraction;    Differential thermal expansion;    Fibre Metal Laminates;    Glass fibre reinforced polymers;    Temperature dependent;    Thermal and mechanical loadings;    Three-point-bending experiments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/171/1/012147/pdf
DOI  :  10.1088/1757-899X/171/1/012147

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The paper describes a temperature-dependent extension of the classical laminate theory (CLT) that may be used to predict the mechanical behaviour of Fibre Metal Laminates (FML) at cryogenic conditions, including crack initiation. FML are considered as a possible alternative class of structural materials for the transport and storage of liquified gasses such as LNG. Combining different constituents in a laminate opens up the possibility to enhance its functionality, e.g. offering lower specific weight and increased damage tolerance. To explore this possibility, a test programme is underway at the University of Twente to study transverse crack initiation in different material combinations under combined thermal and mechanical loading. Specifically, the samples are tested in a three-point bending experiment at temperatures ranging from 77 to 293 K. These tests will serve as a validation of the model presented in this paper which, by incorporating temperature-dependent mechanical properties and differential thermal expansion, will allow to select optimal material combinations and laminate layouts. By combining the temperature-dependent mechanical properties and the differential thermal contraction explicitly, the model allows for a more accurate estimate of the resulting thermal stresses which can then be compared to the strength of the constituent materials.