Investigation of constraint and warm prestressing effects by means of a local approach to fracture

Comparison of constraint analyses with global and local approaches under uniaxial and biaxial loadings

“…The difference of constraint effect (in-plane and out-of-plane) in different specimens and structures, as shown in Fig. 1, should be taken into account (Qian and Niffenegger, 2015). There are two options to consider the constraint effect.…”

Critical plane–based multiaxial fatigue life prediction of turbine disk alloys by refining normal stress sensitivity

“…[15][16][17] In the process of multiaxial fatigue life estimation, how to relate the stress-strain response to the crack initiation process that occurs in the material is still the most essential part for fatigue design and reliability assessment of engineering components. [18][19][20][21][22][23][24][25][26][27][28] Until now, a large amount of critical plane approaches for damage modeling and life prediction under multiaxial loadings have been developed, including the models proposed by Wang-Brown (WB), 29,30 Fatemi-Socie (FS), 31 and Smith-Watson-Topper (SWT). 32 Brown and Miller 33 introduced a plane with the maximum shear strain (MSS) as the critical plane and modified the normal strain item on the same plane.…”

Comparison of KI calculation methods

“…Thus, the SIF K has been widely used in fracture mechanics analysis and structural integrity assessment, e.g. of reactor pressure vessels (RPVs) [2][3][4]. In such calculations, the question concerning the appropriate method for the calculation of KI arises.…”