Dean, G; Wright, L (2000) Deformation of a centrally loaded circular plate of a thermoplastic material: comparison of measurements with predictions using finite element analysis. NPL Report. CMMT(A)299

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Abstract

Finite element analyses have been carried out on specimens of an ABS and a propylene-ethylene copolymer in the form of a circular plate that is supported on a circular annulus and loaded at its centre by a hemispherical surface. Predictions have been made of force vs central deflection under different loading speeds using elastic-plastic materials models in Abaqus. Two models have been considered based on the von Mises and the linear Drucker-Prager yield criteria. The materials parameters for these analyses were determined from tensile and shear tests on the polymers. Calculations have also been made of surface strain distributions in the deformed specimens.
Measurements of force/deflection curves and surface displacements have been made and compared with predicted results from the two models. Force/deflection curves compare closely with measured values but predictions of surface displacements differ widely between the two models and also with experiment.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	CMMT(A)299
Subjects:	Advanced Materials Advanced Materials > Materials Modelling Advanced Materials > Polymers
Last Modified:	02 Feb 2018 13:17
URI:	http://eprintspublications.npl.co.uk/id/eprint/1928

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