A survey of failure criteria and parameters in mixed-mode fatigue crack growth

摘要: From the present survey of mixed-mode crack growth criteria based on fracture toughness K Ic (critical J-integral), it follows that this concept is very extensively and variously used by different authors. The discussed in work are parameters K, δ, W, J. most applied models include mixed mode I + II described stress intensity factor K. presented factors affecting fatigue during testing, namely stress, crack-tip displacement, or energy dissipation. In case cracking, special attention should be paid to approach (application J-integral strain density), which seems promising for elastoplastic materials. Under two things taken into account: rate direction fatigue-crack growth. Moreover, nonproportional loading, closure, overloads strongly affect process cracking.