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Material properties for part design

Posted by admin on July 23rd, 2012

Plastics are sensitive to operating conditions

The plastics molding processes allow parts designers more freedom than working with metals because plastics materials are so versatile. Unlike metals, however, the mechanical properties of plastics are very sensitive to the type, rate, duration, and frequency of loading, the change in operating temperature, and in some cases, relative humidity. The plastics part designer must take a material’s response to these conditions into account. The table below lists the five typical loading and operating conditions, together with the relevant material properties a designer needs to consider.

TABLE 1. Typical loading/operating conditions together with the relevant material properties


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