ASTM D543 Test Fixtures

1.ASTM D543 BENDING TEST JIG

ASTM D543 Strain Test Procedure: For each condition involving a material, chemical, time, or strain, at least five specimens should be used. In advance of coming into touch with the chemical reagent, specimens can be weighed and measured. Strain jigs made for ASTM izod bars or ASTM Type I tensile bars are used to replicate end use stress in the test samples. The test sample's exposure to the chemical agent could be through immersion, wiping, spraying, or using soaked gauze, depending on the type of contact that is anticipated. Next, a container containing the test samples is sealed, and it is either heated in an oven or allowed to sit at room temperature. The specimens are taken out after the predetermined amount of time and tested for the required characteristics, such as changes in weight, appearance, or tensile properties in comparison to controls.

Strain Jigs: Jigs must be able to apply test specimens with known quantities of strain. A typical strain jig used to obtain 1.0% strain in a sample.

Test specimen with a thickness of 3.2 mm (0.125 in). An equation that can be used to back-calculate jig dimensions for a desired specimen strain or calculate strain from known dimensions.

An example test fixture design with R=64 mm, shown in below:

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