Three-point bending flexural test 

In a 3-point bending flexural test, a standardized specimen is bent under uniaxial bending stress until plastic deformation or fracture occurs. In this way, strength parameters such as the flexural yield point, the flexural offset yield point, the ultimate flexural strength or the deflection at break are determined. Learn more about the bending flexural test in this video.
00:00 Test setup
00:52 Stress distribution
03:52 Flexural stresses
06:55 Testing of ductile materials
07:02 Flexural yield point
09:10 Flexural offset yield point
09:45 Flexural strain
10:42 Testing of brittle materials
10:57 Ultimate flexural strength
11:58 Brittle materials in the tensile test
12:30 Four point bending flexural test
13:07 Determination of the Young’s modulus
14:22 Calculating the flexural strain
15:13 Stress distribution without strain hardening
16:07 Stress distribution with strain hardening
17:27 Residual stresses
18:48 Stress distribution for grey cast iron
video tensile test @ 11:58