Crack growth rate

The crack propagation speed da / dN reflects the crack propagation (da) that is generated per load change (dN). Here, a is the crack length divided by the diameter of the component cross-section. (Depending on the location of the crack and the geometry of the component, i.e. the ratio of the crack length already reached to the length at which failure occurs, i.e. the component is completely torn through)

The speed of crack propagation depends on the level of load , the type of load, the material considered, as well as the surrounding medium and temperature .

literature

• Joachim Rösler, Harald Harders, Martin Bäker: Mechanical behavior of materials. 2nd edition, BG Teubner Verlag, Wiesbaden 2006, ISBN 978-3-8351-0008-4 .

Web links

• Fracture mechanical investigations on materials for steam power plants with live steam temperatures of 500 to 650 ° C (accessed on October 18, 2019)
• Material-influenced component behavior crack and crack propagation (accessed on October 18, 2019)
• Fracture mechanical characterization of austenitic stainless steels in the case of chloride-induced stress corrosion cracking (accessed on October 18, 2019)
• Fatigue strength tests (accessed on October 18, 2019)
• Deformation behavior of technical aluminum alloys (accessed October 18, 2019)