Numerical modeling of ductile crack growth in 3-D using computational cell elements

Ruggieri, Cláudio; Panontin, Tina L.; Dodds, Robert H.

doi:10.1007/bf00017864

Cited by 157 publications

(100 citation statements)

References 40 publications

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“…In fact, numerous successful applications of damage models of the "porous metal plasticity" family exist via the implementation in the framework of finite elements [94][95][96][97]. The models were used for the assessment of thick-walled geometries, where a high constraint causes a high triaxiality and thus void growth has a significant effect on the stress carrying capacity of a material point.…”

Section: Damage Modelsmentioning

confidence: 99%

Fracture and damage mechanics modelling of thin-walled structures – An overview

Zerbst¹,

Heinimann

Donne³

et al. 2009

Engineering Fracture Mechanics

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Section: Damage Modelsmentioning

confidence: 99%

Fracture and damage mechanics modelling of thin-walled structures – An overview

Zerbst¹,

Heinimann

Donne³

et al. 2009

Engineering Fracture Mechanics

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“…This approach is computationally intensive and is able to account for only a few voids ahead of the crack tip. ț An alternative approach, which has been pursued mainly by groups in France, Germany, the UK and the US [10][11][12][13][14][15][16][17][18][19][20][21], employs a constitutive model, such as the Gurson model, that accounts for the damaging effect of voids. The constitutive model is implemented in a finite element code to simulate the initiation and growth of the crack.…”

Section: Introductionmentioning

confidence: 99%

Micromechanics-based model for trends in toughness of ductile metals

2003

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Relations between fracture toughness and microstructural details have been calculated for ductile materials based on a dilatational plasticity constitutive model that has recently been proposed. The model generalizes the Gurson model to account for both void growth and coalescence with explicit dependence on void shape and distribution effects. Based on a small scale yielding formulation of crack growth, toughness trends are determined as a function of yield stress, strain-hardening, initial porosity, void shape and spacing as well as void spacing anisotropy. Distinctions are drawn between the engineering fracture toughness, which is typically associated with 0.2 mm of crack growth, and the theoretical toughness based on coalescence of the crack tip with the first void ahead of it. Comparison with one set of experimental data for a steel is made for which a fairly complete characterization of the microstructure is available.

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“…This profile is not typically seen in metals but have been observed in fatigue testing of ductile polymer foams [37]. Reverse crack front profiles have also been observed during fracture tests at the root of side grooved specimen [38].…”

Section: Constant Critical Plastically Dissipated Energymentioning

confidence: 59%