A C D E F G H I L M P R S T V W Y

Flexural modulus

The flexural modulus is the measure of material's stiffness in a bent mode.  It is commonly expressed in the unit scale of MPa, which is equivalent to 10 6 Pa. High flexural modulus means that the material is stiff. On contrary, low flexural modulus means that the material is more flexible.

This is similar to the tensile modulus measurement, but the application of force bends the material from a point instead of extending it. The flexural modulus becomes very practical when the geometry of the application is a structural/bulky volume and when the component service failure most likely occurs in bending mode.The standard testing for flexural modulus involves placing a material sample on its  two ends and then constantly applying force at a certain point until the material sample breaks apart. Throughout the bending force application, a characteristic stress-strain curve is obtained. The flexural modulus  is identified as the gradient of the curve up to the yield point (the curve typically has linear correspondence up to the yield point).