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. 6th European Conference on Computational Mechanics (ECCM 6) 7th European Conference on Computational Fluid Dynamics (ECFD 7), Glasgow, UK, 11-15 Jun 2018.

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 or Workshop Item
• 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 & Humanities > School of Culture and Creative Arts; College of Science and Engineering > School of Engineering > Systems Power and Energy

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