DISPLACEMENT DISCONTINUITY METHOD (DDM)

A crack or fracture has two surfaces or boundaries, one effectively coinciding with the other. Conventional boundary element methods, such as the Direct Integration Method, therefore become inefficient in simulating this problem. The Displacement Discontinuity Method (DDM) was developed by Crouch (1976) to cope with problems of this type. The DDM is based on the analytical solution to the problem of a constant discontinuity in displacement over a finite line segment in the x, y plane of an infinite and elastic solid. Physically, one may imagine a displacement discontinuity as a line crack whose opposing surfaces have been displaced relative to one another (see Figure 2.1 in Displacement Discontinuity Method in an infinite solid.)

 

Displacement Discontinuity Method in an infinite solid

Numerical procedure

 

Back to Home

To Running Fracod2D Simmulation