Answer :
If the tensile bar sample to be tested measures 6.5 inches in overall length, what type of tensile sample is it according to ASTM D638.According to ASTM D638, the tensile test samples come in various types, and the type of the sample is determined by its dimensions.
The type of tensile sample with dimensions of 6.5 inches in overall length is Type IV tensile sample.Type IV tensile sample measures 6 inches in gauge length, 0.5 inches in width, and has a minimum thickness of 0.125 inches.ASTM D638 defines the minimum requirements for tensile testing of plastics.
According to the data sheet and the ASTM standard, the "normal" strain rate for the tensile test is 50 mm/min or 2 inches/min. The strain rate is the speed at which the test sample is pulled or stretched during the tensile test.
The rate of deformation of the sample is an essential parameter to measure the properties of the sample during the tensile test.
The rate of deformation affects the mechanical properties of the material, and the standardization of strain rates is necessary to compare the test results between different materials and testing laboratories. The standard strain rate of 50 mm/min or 2 inches/min is widely used in the plastics industry to provide standardized test results.
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