2.3.2. Flexural test
The flexural specimens are prepared as per the ASTM D790
standards. The 3-point flexure test is the most common flexural
test for composite materials. Specimen deflection is measured by
the crosshead position. Test results include flexural strength and
displacement. The testing process involves placing the test specimen
in the universal testing machine and applying force to it until
it fractures and breaks. The specimen used for conducting the flexural
test is presented in Fig. 2. The tests are carried out at a condition
of 23 ± 2 C and an average relative humidity of 50%.