Fatigue damage evolution

Bellemare S C, Dickson J I, Bureau M N and Denault J (2005) Bulk fatigue damage evolution in polyaniide-6 and in a polyainide-6 uanocomposite, Polym Compos 26 636-646. 

The significance of localized corrosion on the evolution and distribution of fatigue damage was not fully appreciated. 

Figure 10.9. Successive simulation showing the evolution and distribution of corrosion and fatigue damage, and the formation of significant areas of multi-site damage (MSD) over 1,000 fastener holes for the CZ-184 aircraft [14].

After a constitutive model has been chosen, calibrated, and validated for a particular fluoropolymer, it becomes as easy to perform multiaxial deformation simulations as it is to simulate uniaxial deformation. If the material model considers time dependence, temperature dependence, or damage evolution, then thermomechanical or fatigue loading can also easily be simulated. Since almost all commercial finite element (FE) software packages allow for nonlinear simulations including considerations of large deformations, the key component of performing accurate finite element simulations lies within the specification and calibration of the constitutive model. 

In this form the criterion can be clearly seen as a polynomial function of the applied stress components. Therefore, in spite of being derived from experimental observation of the damage evolution, the model does not eventually incorporate any parameter suitable for describing the growth and accumulation of damage along the fatigue fife. 

A recent review by the authors [1] presents several works on fatigue damage under multiaxial loading. Unfortunately, most of these describe damage evolution... 

Figure 15.6 Conceptual description of the evolution of fatigue damage in a cross-ply laminated composite.

Gude M, Hufenbach W, Koch I. Damage evolution of novel 3D textile-reinforced composites under fatigue loading conditions. Compos Sci Tech 2010 70(l) 186-92. 

G. Allegri, M.R. Wisnom (2012), A non-linear damage evolution model for mode 11 fatigue delamination onset and growth. International Journal of Fatigue, 43, 226-234. 

Yang Betal, 2005. Temperature evolution during fatigue damage [J]. IntermetaUics, 13 419-428. 

Long-term creep and fatigue-relaxation tests are essential for providing macroscopic data and aUowrng the observation of the long-term dislocation microstnicture and damage evolutions. 

Fig. 1.56 Fatigue diagram for Armco iron with marked zones of different damage evolution [47]...

Fig. 8.27 Damage evolution in Stage I and II of fatigue. In Stage I damage progression and accumulation is not linear and depends on stress amplitude. In Stage II damage progression is not linear, but accumulation is linear...

Stolkarts, V. Keer, L.M. Fine, M.E. Damage Evolution Governed by Microcrack Nucleation with Application to the Fatigue of 63Sn-37Pb, PhD Thesis, Northwestern University, J. Mech. Phys. Solids 1999, 47, 2451-2468. 

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