Hardness Examples of Rockwell M versus Shore D for some thermoplastics

Thermoplastics have a viscoelastic behaviour that increases with temperature their properties are a function of the duration of load application. [Pg.164]

Creep is the time-dependent strain induced by a constant mechanical loading. The strain is a function of the stress level, the time for which the stress is applied, and the temperature. The results can be presented graphically in various ways by combining these three parameters or in quantified forms creep modulus and creep strength, for example. [Pg.164]

The creep modulus for a specified stress, time and temperature is the value of the stress divided by the strain measured after the selected time. [Pg.164]

Creep modulus and strength values are broadly inferior to their counterparts measured by dynamometry. [Pg.164]

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