Characteristics and Applications of Polymers - Miscellaneous Mechanical Characteristics

3 important questions on Characteristics and Applications of Polymers - Miscellaneous Mechanical Characteristics

What are the two impact characteristics that are most sought after?

A high impact strength at a certain temperature and a ductile-to-brittle transition temperature below room temperature.

What is fatigue failure?

Under certain cyclic loading conditions fatigue occurs. Fatigue strengths and limits are much lower for polymeric materials than for metals.

Why is fatigue behavior for polymers more sensitive to loading frequency than for metals?

Because with polymers high frequency cycling can cause localized heating and thereby softening of the material.

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