Gaseous Atmosphere Influence on Fatigue Crack Propagation

Petit, J.; Hénaff, Gilbert; Lesterlin, S.; Sarrazin-Baudoux, C.

doi:10.1007/978-94-011-5556-4_10

Cited by 4 publications

(3 citation statements)

References 39 publications

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“…The crack's area increases as a consequence of both crack tip plastic deformation and the action of the environment 14–18 …”

Section: Thermodynamics Of the Dissipative Processes Applied To The Cmentioning

confidence: 99%

“…The crack's area increases as a consequence of both crack tip plastic deformation and the action of the environment. [14][15][16][17][18] Figure 14, for instance, is an illustration of the appearance of a free surface, as a result of plastic deformation along a single slip system. The crack extent is usually geometrically related to plastic blunting at the crack tip ( Fig.…”

Section: Crack Growth Equationmentioning

confidence: 99%

“…Taking also into account the cracking law introduced in Eq. (15), and the expression of f , allows the determination of the expression of the multiplier λ, from which dρ/dt can be calculated: (41)…”

Section: Flow Criterion and Flow Rulementioning

confidence: 99%

See 2 more Smart Citations

Incremental model for fatigue crack growth based on a displacement partitioning hypothesis of mode I elastic–plastic displacement fields

Pommier

Hamam

2007

Fatigue Fract Eng Mat Struct

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A B S T R A C TThe mode I displacement field in the near crack tip region is assumed to be depicted by its partition into an elastic field and a plastic field. Then, each part of the displacement field is also assumed to be the product of a reference field, a function of space coordinates only, and of an intensity factor, function of the loading conditions. This assumption, classical in fracture mechanics, enables one to work at the global scale since fracture criteria can be formulated as a function of the stress intensity factors only. In the present case, the intensity factor of the plastic part of the displacement field measures crack tip plastic flow rate at the global scale. On the basis of these hypotheses, the energy balance equation and the second law of thermodynamics are written at the global scale, i.e. the scale of the K-dominance area. This enables one to establish a yield criterion and a plastic flow rule for the crack tip region. Then, assuming a relation between plastic flow in the crack tip region and fatigue crack growth allows an incremental model for fatigue crack growth to be built. A few examples are given to show the versatility of the model and its ability to reproduce memory effects associated with crack tip plasticity.

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“…The crack's area increases as a consequence of both crack tip plastic deformation and the action of the environment 14–18 …”

Section: Thermodynamics Of the Dissipative Processes Applied To The Cmentioning

confidence: 99%

Section: Crack Growth Equationmentioning

confidence: 99%