CIRP Encyclopedia of Production Engineering

2019 Edition
| Editors: Sami Chatti, Luc Laperrière, Gunther Reinhart, Tullio Tolio

Crack Initiation

  • Fengzhou FangEmail author
  • Min Lai
Reference work entry



Crack initiation is the formation process of a crack, including the incubation period and the embryonic stage.

Theory and Application


Fracture failure is one of the biggest threats to the structures in the engineering materials. The fracture process of materials consists of the crack initiation, crack propagation, and final parting. Apparently, the crack plays an important role in the fracture of materials. The cracks can be produced in the process of manufacturing, assembly, and service, which are the interaction results of the material microstructures, loading condition, and environment. Generally, the performance of structures would be adversely affected by the existence of cracks. For example, the cracks in the laser crystal would reduce its laser-induced damage threshold (LIDT), the cracks in the bearing structure are likely to shorten its service life, and the cracks on the optical surface would affect its...

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Copyright information

© CIRP 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Precision Measuring Technology and Instruments, Centre of MicroNano Manufacturing TechnologyTianjin UniversityTianjinChina
  2. 2.Centre of MicroNano Manufacturing Technology (MNMT-Dublin)University College DublinDublinIreland

Section editors and affiliations

  • Han Haitjema
    • 1
  1. 1.Mitutoyo RCEBestThe Netherlands