This is called a 3-point bend test. A test sample of material is deflected at a constant rate between two fixed contact points while force and displacement are recorded. These values can then be used to calculate flexural strength, flexural strain, and flexural modulus of a material. . We used 3-point bend tests to compare different candidate epoxy resins we were considering for use in our carbon fiber composite. Epoxy resin manufacturers publish some numbers on the mechanical properties of thei