Some properties of stable crack growth

✍ Scribed by Karl-Heinz Schwalbe

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 908 KB
• Volume: 11
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(79)90009-2

✦ Synopsis

A survey is given on the results of stable crack growth studies done at DFVLR. The tests were done under both cyclic and monotonic loads. Special attention was given to the effects of specimen size and material on crack growth. It was found that certain similarities exist between crack growth under cyclic and monotonic loads, respectively. Some simple calculations are compared with experimental results. NOTATION specimen width of bend specimens, half width of center cracked tension specimens thickness Young's modulus stress intensity crack resistance at onset of crack growth by dimple formation crack resistance at onset of crack growth by crack tip blunting fracture toughness plateau value of K K,,,, for pure plain strain cyclic stress intensity threshold value of AK crack length crack length increase crack growth rate under cyclic load strain hardening exponent crack tip opening displacement cyclic crack tip opening displacement crack tip advance displacement logarithmic fracture strain fracture strain at crack tip Poisson's ratio yield strength length of plastic zone