An anisotropic tertiary creep damage constitutive model for anisotropic materials

Creep crack growth data reduction of directionally solidified Ni base superalloy usingCtestimation scheme for anisotropic materials

“…Therefore, it is apparent that the analytically estimated results were over-estimated in comparison with experimentally measured ones. However, it should be noted that the relationship of equation (14) which considers anisotropy of the material is closer to the experimental relationship of equation (13) in comparison with the relationship of equation (15). This difference between analytic and experimental relationships occurred because the relationship of equation (11) was obtained using secondary creep behaviour only.…”

“…In equations (14) and (15), both coefficients and exponents are higher than those in equation (13). Namely, the coefficients of equations (14) and (15) are 10 3 and 10 4 higher than those of equation (13) respectively.…”

“…at elevated temperature. [11][12][13][14] However, there have been limited numerical and experimental studies on the crack tip deformation mechanics for anisotropic creeping materials at elevated temperatures. [15][16][17][18][19] Gardner et al 15 discussed the applicability of the C t parameter to a DS Ni based superalloy.…”

A generic anisotropic continuum damage model integration scheme adaptable to both ductile damage and biological damage-like situations

“…While damage evolution laws were proposed in the original works deriving the GTN or CDM approaches, several other damage rate expressions can be found in the literature describing different damage mechanisms (Duddu and Waisman, 2013;Souza and Allen, 2012;Tekoglu and Pardoen, 2010;Hammi and Horstemeyer, 2007;Qi and Bertram, 1999;Kitzig and Häußler-Combe, 2011;Lecarme et al, 2011;Khan and Liu, 2012;Lai et al, 2009;Zaïri et al, 2011) and coupling with time-, rate-, and temperature-dependent materials (Abu Al Rub and Darabi, 2012;Besson, 2009;Stewart et al, 2011;Horstemeyer et al, 2000;Guo et al, 2013), to cite only a few.…”

Creep and fatigue lifetime analysis of directionally solidified superalloy and its brazed joints based on continuum damage mechanics at elevated temperature

“…Specifically, Kachanov model is employed to predict the creep lifetime [9] and Chaboche model is applied to characterize the fatigue lifetime [10]. The predicted creep and fatigue lifetime is compared with the experimental data.…”