An experimental method for estimating the tearing energy inrubber-like materials using the true stored energy
2015 (English)Report (Other academic)
A method for determining the critical tearing energy in rubber-like materials is proposed. In this method, the energy required for crack propagation in a rubber-like material is determined by the change of the recovered elastic energy. Hence, the dissipated energy due to different inelastic processes is deducted from the total strain energy applied to a system. Therefore, the classical method proposed by Rivlin and Thomas (Rivlin and Thomas in Journal of Polymer Science 10(3):291-318,1953) using the pure shear tear test is modified using the actual stored elastic energy. The elastically stored energy in a pure shear is determined experimentally using cyclic loading. The experimental results show that the classical method overestimates the critical tearing energy by approximately $15\%$. Moreover, the effect of the unloading rate on the determination of the elastically stored energy is investigated and found to be minimal suggesting that the crack propagation velocity has a minor effect in the change of the elastically stored energy.
Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2015.
TRITA-HFL. Report / Royal Institute of Technology, Solid Mechanics, ISSN 1654-1472 ; 580
Other Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-178050OAI: oai:DiVA.org:kth-178050DiVA: diva2:876370
QC 201512032015-12-032015-12-032016-03-01Bibliographically approved