Rubber and rubber-like elastomers fail in a brittle manner. Therefore, I have some idea how the defect free bulk material fails. I have seen such failures in tension. But I have never seen any compressive failures. Has anyone found a photo of cracking of rubber-like materials in uniaxial or planar compression? Or can anyone make such photos?
Dear Manfred Staat, if I understood well the question, some element designed for anti-sismic/anti-earthquake on bridges and height buildings are pads which absorb compression load waves by cracking progressively. In cars also damping is insured by similar items. Please have a look at the following documents. My Regards
Dear Abdelkader,
The absorber pads can be a rubber structure to look at. I am looking for rubber without reinforcements. What is the failure in homogeneous rubber? Also, the stress/strain should be simple and homogeneous so that the relationship to failure is beyond doubt.
In Article An Extension Strain Type Mohr–Coulomb Criterion
Fig. 1 shows what is expected for rock in uniaxial and biaxial loading. Fig. 3 shows some photos of observed fractures.
Fig. 1 is uploaded below.
Manfred
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