Investigating High Strain Rate Behaviour of Foams Using Digital Image Correlation
The use of closed cell foam sandwich structures in applications where a risk or impact or collision is increased leads a need to understand the dynamic behaviour of such materials. This work uses a specialised Instron servo-hyrdraulic test machine to apply intermediate strain rates to foam tensile dogbone specimens. The overall aim of this work is to provide a full thermomechanical characterisation of the foam material using digital image correlation (DIC) to measure strain, and infra-red thermography to measure temperature. This paper presents some initial strain data measured using DIC on images captured using a high speed camera. The results suggest a strain rate dependence when compared to the manufacturer's data sheet for quasi-static values.
KeywordsDigital Image Correlation High Speed Camera Instron Test Machine Intermediate Strain Rate Foam Specimen
- 5.DIAB, Divinycell PVC datasheet. (2010) http://www.diabgroup.com. 2010
- 6.Crump DA, Dulieu-Barton JM, Fruehmann RK (2011) Challenges in synchronising high speed full-field temperature and strain measurement. In: International congress of the society for experimental mechanics, UncasvilleGoogle Scholar