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Influence of temperature and strain rate on cohesive properties of a structural epoxy adhesive
SAAB Automobile AB, Trollhättan, Sweden.
University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Technology and Society.
University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Technology and Society.
2009 (English)In: International Journal of Fracture, ISSN 0376-9429, E-ISSN 1573-2673, Vol. 155, no 2, 155-166 p.Article in journal (Refereed) Published
Abstract [en]

Effects of temperature and strain rate on the cohesive relation for an engineering epoxy adhesive are studied experimentally. Two parameters of the cohesive laws are given special attention: the fracture energy and the peak stress. Temperature experiments are performed in peel mode using the double cantilever beam specimen. The temperature varies from −40 to + 80°C. The temperature experiments show monotonically decreasing peak stress with increasing temperature from about 50 MPa at −40°C to about 10 MPa at + 80°C. The fracture energy is shown to be relatively insensitive to the variation in temperature. Strain rate experiments are performed in peel mode using the double cantilever beam specimen and in shear mode, using the end notch flexure specimen. The strain rates vary; for peel loading from about 10−4 to 10 s−1 and for shear loading from 10−3 to 1 s−1. In the peel mode, the fracture energy increases slightly with increasing strain rate; in shear mode, the fracture energy decreases. The peak stresses in the peel and shear mode both increase with increasing strain rate. In peel mode, only minor effects of plasticity are expected while in shear mode, the adhesive experiences large dissipation through plasticity. Rate dependent plasticity, may explain the differences in influence of strain rate on fracture energy between the peel mode and the shear mode.

Place, publisher, year, edition, pages
Springer, 2009. Vol. 155, no 2, 155-166 p.
Keyword [en]
Cohesive law - Strain rate - Temperature dependence - Experimental - DCB-specimen - ENF-specimen - Crashworthiness
National Category
Engineering and Technology
Research subject
Technology
Identifiers
URN: urn:nbn:se:his:diva-3308DOI: 10.1007/s10704-009-9337-4ISI: 000265088900005Scopus ID: 2-s2.0-67349231905OAI: oai:DiVA.org:his-3308DiVA: diva2:227254
Available from: 2009-07-10 Created: 2009-07-10 Last updated: 2013-03-27Bibliographically approved

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CiteExportLink to record
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Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
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  • nn-NB
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More languages
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