From Measurements Errors to a New Strain Gauge Design

Lars Pilgaard Mikkelsen, Sanita Zike, Marco Salviato, Jacopo Gili

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


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.
Original languageEnglish
Title of host publicationProceedings of 20th International Conference on Composite Materials
Number of pages5
Publication date2015
Publication statusPublished - 2015
Event20th International Conference on Composite Materials (ICCM20) - Copenhagen, Denmark
Duration: 19 Jul 201524 Jul 2015
Conference number: 20


Conference20th International Conference on Composite Materials (ICCM20)


  • Strain gauge
  • Strain measurements
  • Composites testing
  • Young modulus

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