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Design for strength

Posted by admin on July 25th, 2012

Predicting part strength

The success of failure of the plastics part design is often determined by how accurately the part strength (stiffness) can be predicted. The types of strength correspond to the load and restraint conditions to which the part is subjected, such as tensile, compressive, torsional, flexural, and shear. The strength of a plastics part will depend on the material, the geometry of the part, constraint conditions on the part, and the residual stresses and orientations that result from the molding process.

Loading/operating conditions

The strength values that must be used for designing viable, long-lived plastics parts depend on the nature of the expected load:

Short-term loading

Long-term loading

Repeated loading

Enhance heat dissipation

Loading at extreme temperatures

Relevant material properties associated with the various loading conditions are discussed in Material properties for part design.


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