Mitigating The Influence Of Specimen Pre-shear And Wrinkling On The Accuracy Of Uniaxial Bias Extension Test Results

Harrison, P. , Alsayednoor, J., Taylor, E., Lennard, F. and Yu, W. R. (2018) Mitigating The Influence Of Specimen Pre-shear And Wrinkling On The Accuracy Of Uniaxial Bias Extension Test Results. In: 6th European Conference on Computational Mechanics (ECCM 6) 7th European Conference on Computational Fluid Dynamics (ECFD 7), Glasgow, UK, 11-15 Jun 2018,

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Abstract

The influence of unintended specimen pre-shear and out-of-plane wrinkling on the accuracy of shear angle and axial force results, measured during a uniaxial bias extension (UBE) test on engineering fabrics, is examined. Three techniques of measuring test kinematics are investigated, including manual image analysis, 2-D and 3-D full-field analysis. Out-ofplane wrinkling is shown to create significant errors in kinematic data when using 2-D analysis methods (up to 20% overestimates of measured shear angle). To mitigate errors due to wrinkling of engineering fabrics, numerical and experimental investigations have been conducted, aimed at evaluating the use of transparent anti-wrinkle plates. Predictions of the numerical investigation suggest that the anti-wrinkle plates significantly improve the accuracy of kinematic measurements while introducing only a very minor stiffening effect on the axial force versus shear angle data.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lennard, Professor Frances and Alsayednoor, Dr Jafar and Harrison, Dr Philip
Authors: Harrison, P., Alsayednoor, J., Taylor, E., Lennard, F., and Yu, W. R.
College/School:College of Arts > School of Culture and Creative Arts
College of Science and Engineering > School of Engineering > Systems Power and Energy
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