Material forces in micromorphic fracture mechanics

Meshless Methods in Solid Mechanics

“…It can be shown that, in a very special case, the projection of F in the direction tangent to the crack path behind the crack tip is reduced to the J -integral, which is path independent if the material within is homogeneous. For readers interested in material forces, more recent works are found in Chen and Lee (2005), Lee et al (2004), Lee and Chen (2005).…”