Crocker, L; Dean, G (2001) Temperature dependence of the properties of an epoxy adhesive. NPL Report. MATC(A)43

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Abstract

The work reported here is conserned with comparing the behaviour of a toughened epoxy adhesive at two temperatures, 23ºC and 0ºC. Tensile and shear tests have been carried out on bulk samples at 23ºC and 0ºC. A wide range of deformation speeds has been employed in these tests to determine the strain rate dependance of the mechanical properties. The results obtained at the two temperatures have been compared. It was found to be more difficult to obtain reliable data at 0ºC.
The experimental data have been used to calculate FE parameters for both the linear and exponent forms of the Drucker-Prager materials model. The calculation of these parameters is explained in detail. Problems with the calculation of parameters at 0ºC were highlighted, and a possible solution presented.
Predictions of force against extension were mage for a lap-joint specimen using 23ºC and 0ºC FE parameters. Solutions were obtained over a range of loading speeds using static and dynamic analyses with standard and explicit solvers. Predictions are compared with experimental data that had been obtained at 23ºC and 0ºC over a range of loadinh rates. Possible explanations for the differences between measured and predicted force/extension curves are outlined.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	MATC(A)43
Subjects:	Advanced Materials Advanced Materials > Adhesives
Last Modified:	02 Feb 2018 13:17
URI:	http://eprintspublications.npl.co.uk/id/eprint/2099

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