Abstract
Observations are reported on a medical grade of silicone elastomer in uniaxial tensile tests up to breakage of specimens, short-term relaxation tests, and cyclic tests with monotonically increasing maximum elongation ratios. Experimental data in cyclic tests demonstrate the fading memory phenomenon: stress-strain diagrams for two specimens with different deformation histories along the first n-1 cycles and coinciding loading programs for the other cycles become identical starting from the nth cycle. A constitutive model is developed in cyclic viscoplasticity of elastomers with finite strains, and its adjustable parameters are found by fitting the experimental data. Ability of the stress-strain relations to predict the mechanical response in cyclic tests with various deformation programs is confirmed by numerical simulation.
Original language | English |
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Pages (from-to) | 2061-2074 |
Number of pages | 14 |
Journal | Meccanica |
Volume | 48 |
Issue number | 8 |
DOIs | |
State | Published - 1 Oct 2013 |
Externally published | Yes |
Keywords
- Constitutive modeling
- Cyclic viscoplasticity
- Fading memory
- Finite deformations
- Silicone elastomer
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering