Dimensionally Stable Laminates Under Thermal Loading and Their Applications
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Date
2019-12-17
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EDP Sciences
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Abstract
There exist many types of structures, which are required to have stable dimensions within a wide range of temperatures. The specific nature of composites allows finding special conditions when a laminate stacking sequence can provide zero thermal expansion coefficients in one or more directions. This allows the structure being designed to have the same dimensions in a wide range of temperatures. This work is aimed to find mathematical conditions, which guarantee in-plane zero CTE at least in one direction. As an application of thermally stable laminates a rotating disk is chosen. The mathematical model for such a disk is presented. Among investigated materials there was not found any of them, which can be used to layup a laminate with zero CTEs in two directions. However, all investigated materials can be used to layup many laminates with zero CTE in one or another direction. Moreover, it was discovered a laminate might have a zero CTE, if the lamina has zero or negative CTE at least in one direction. It was found the stresses, which appear in a laminated disk caused by centripetal forces, are insignificantly low in comparison to the thermal ones within the investigated ranges of angular velocity and temperature.
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MATEC Web of Conferences. 2019, vol. 2019, issue 304, p. 1-10.
https://www.matec-conferences.org/articles/matecconf/pdf/2019/53/matecconf_easn2019_01001.pdf
https://www.matec-conferences.org/articles/matecconf/pdf/2019/53/matecconf_easn2019_01001.pdf
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Peer-reviewed
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en