Final answer:
The dimension and support span distance requirements for composite panel 3pt bending tests depend on the specific standards and specifications set by the testing organization or industry.
Step-by-step explanation:
The precise standards and specifications established by the industry or testing organization determine the dimensions and support span distance needed for composite panel 3pt bending tests. Generally speaking, though, the composite panel's length, width, and thickness should all be predetermined. The distance between the supports that the panel is positioned on during the bending test is known as the support span distance.
For instance, the dimensions of the test specimen can be specified as 3.2 mm (1/8 inch) in thickness and 12.7 mm (1/2 inch) in width in a typical ASTM D790 standard for the flexural properties of unreinforced and reinforced plastics. The support span distance is set to 16 times the thickness of the specimen.
However, it is important to refer to the specific testing standards or guidelines applicable to the composite panel being used to ensure accurate and reliable testing results.