Numerical Flexibility Determination Method of Stress Intensity Factor for Concrete

Flexibility method is a commonly used method to determine fracture toughness. In the experiment, it is necessary to prepare specimens with different crack lengths and other exactly same conditions, and carry out a large number of repeated experimental works. Given the above problems, this paper develops a flexibility determination method based on numerical simulation method to calculate the stress intensity factor and fracture toughness of concrete specimens. The results of the test example show that the use of the numerical simulation experiment method is practically feasible and effective to obtain the relation curve between the flexibility C and the crack length a of the concrete specimens and further get the stress strength factor and the fracture toughness under the ultimate load.