FIELD: testing of textile materials. SUBSTANCE: one end of material is fixed stationary, the other end is moved with force stretching material in agreement wit definite law with predetermined amplitude and frequency under constant preliminary deformation. Three or more recordings of changes of material stretching for small time intervals are conducted. Deformation factors of stiffness and viscosity of material are determined then under multicycle stretching by shapes. EFFECT: improved authenticity of determination of stiffness and viscosity of textile materials under multicycle stretching. 3 dwg
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| DEVICE FOR EXTENSION-TESTING OF MATERIAL SPECIMENS | 0 |
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| PROTECTIVE CLOTH | 1992 |
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