FIELD: test equipment.
SUBSTANCE: invention refers to material test methods. Essence of the invention: a sample is first strained to the maximum set deformation, held in this deformation for a given time, compressed to the initial unloaded state, left in it for a given time, with further cyclic deformation with delays in each deformation stage of compression and tension, where at each tension cycle the set deformation is less than at the previous cycle, and the set deformation at each unloading cycle is larger than in the previous cycle.
EFFECT: more information on material properties from a sample test, new information represented by equilibrium stress-strain curve, dissipation loss, material softening after each tension/compression cycle, and relaxation curves together with material structure recovery curves for various deformations.
2 cl, 1 dwg
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