"From the reviews: ""This monograph is mainly a scope of research results of group of scientists of Ecole Polytechnique-Paris. The results concern crack theory and associated fields as fracture, yielding and material science. ! There are many problems for discussions, e.g. the Dugodale-Barenblatt cracks are absolutely different from physical point of view. ! Altogether the monograph is an interesting and valuable contribution and can be used by researchers and graduate students."" (Jozef Golecki, Zentralblatt MATH, Vol. 1108 (10), 2007)"