What is flexural strength?
(a) The stress value obtained when the peak load value is used in the equation of modulus of rupture
(b) The stress value representing the average flexural strength in the post peak region up to a specified deflection of L/n obtained when Pe,n is used in the equation of modulus of rupture
(c) The load value representing the average load-carrying capacity in the post peak region up to a specified deflection of L/n
(d) Value of the mean equivalent flexural strength normalized with respect to mean flexural strength
