Abstract
Observations are reported on a carbon black-filled thermoplastic elastomer in uniaxial cyclic tensile tests with various maximum strains and double-edge-notched-tensile (DENT) tests with various ligament widths at ambient temperature. It is shown that the stress-strain diagrams in DENT tests measured relatively far away from the ligament coincide with those in tensile cyclic tests on un-notched samples. To describe the viscoplastic response of un-notched specimens, constitutive equations are derived, and adjustable parameters are found by fitting the experimental data. It is demonstrated how the energy stored in a DENT sample under tension can be accounted for in calculations of the specific essential work of fracture.
Original language | English |
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Pages (from-to) | 1977-1995 |
Number of pages | 19 |
Journal | Engineering Fracture Mechanics |
Volume | 76 |
Issue number | 13 |
DOIs | |
State | Published - 1 Sep 2009 |
Externally published | Yes |
Keywords
- Constitutive modelling
- EWF concept
- Polymer matrix composites
- Strain rate effects
- Viscoplasticity
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering