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Publications (6/6 displayed)
- 2016A strain gauge
- 2016Experimental determination of the micro-scale strength and stress-strain relation of an epoxy resincitations
- 2015Micro-Scale Experiments and Models for Composite Materials with Materials Research
- 2015From Measurements Errors to a New Strain Gauge Design
- 2014Correction of Gauge Factor for Strain Gauges Used in Polymer Composite Testingcitations
- 2011An Experimental and Numerical Study of Low Velocity Impact of Unsaturated Polyester/Glass Fibre Composite ; Mažo greičio smūginio poveikio nesočiojo poliesterio ir stiklo pluošto kompozitui eksperimentiniai ir teoriniai tyrimai
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document
From Measurements Errors to a New Strain Gauge Design
Abstract
Significant over-prediction of the material stiffness in the order of 1-10% for polymer based composites has been experimentally observed and numerical determined when using strain gauges for strain measurements instead of non-contact methods such as digital image correlation or less stiff methods such as clip-on extensometers. In the present work, this has been quantified through a numerical study for three different strain gauges. In addition, a significant effect of a thin polymer coating or biaxial layer in the erroneous using strain gauges has been observed. An erroneous which can be significantly decreased using an enhanced grid design of the measuring grid.