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.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 20th International Conference on Composite Materials |
| Number of pages | 5 |
| Publisher | ICCM20 Secretariat |
| Publication date | 2015 |
| Publication status | Published - 2015 |
| Event | 20th International Conference on Composite Materials - Copenhagen, Denmark Duration: 19 Jul 2015 → 24 Jul 2015 Conference number: 20 http://iccm20.org/ |
Conference
| Conference | 20th International Conference on Composite Materials |
|---|---|
| Number | 20 |
| Country/Territory | Denmark |
| City | Copenhagen |
| Period | 19/07/2015 → 24/07/2015 |
| Internet address |
Keywords
- Strain gauge
- Strain measurements
- Composites testing
- Young modulus