The German Guideline “Fracture Mechanics Proof of Strength for Engineering Components” [
] has been released 2001 as a result of activities sponsored by the Research Committee Mechanical Engineering (FKM), task group “Component Strength”. The Guideline describes basics for the integrity assessment of cracked components subjected to static or cyclic loading and provides a step-by-step computational procedure for the use in engineering practice. The Guideline was formulated based on a number of national and international reference documents, in particular SINTAP [
] and BS 7910 [
]. Since 2004 it is also available in English. Subsequently, the computational methods and solutions used in [
] were implemented in a PC program FracSafe (www.fracsafe.de).