Tensile strength of titanium/fibre reinforced polymers at different temperature values
Krzysztof Majerski, Jarosław Bieniaś, Barbara Surowska
Quarterly No. 2, 2018 pages 88-94
DOI:
keywords: fibre metal laminates, tensile strength, temperature, titanium
abstract The study describes the results of tensile strength tests of hybrid laminates composed of thin titanium layers and glass and carbon fibre reinforced polymer layers. The tests were conducted at −120, RT (23°C) and 85°C. The tests allowed the basic mechanical properties to be determined, including: tensile strength, Young's modulus and strain at failure. The tests proved that as the temperature decreases, the strength of titanium/glass fibre reinforced polymers increases by 21 to 26% depending on the configuration, while the strength of titanium/carbon fibre reinforced polymers decreases by 6 to 8%. The Young's modulus values for all the tested systems increase by 3 to 7% as the temperature drops. A different tendency was observed regarding the strain at failure which decreases by 1 to 11% as the temperature drops. The tensile strength test results for the increased temperature (85°C) differ only slightly from those obtained at room temperature. The macroscopic analysis of the failed specimens revealed the existence of characteristic, prevailing forms of failure, namely breaking fibres, matrix cracking, including delamination and permanent deformation of the titanium layers.