A cohesive zone model with rate-sensitivity for fast crack propagation

Valoroso, Nunziante; Debruyne, Gilles; Laverne, Jérôme

doi:10.1016/j.mechrescom.2013.12.008

Cited by 23 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is not true for all materials however and rate sensitivity can manifest itself in a crack at rate facing greater resistance from the surrounding material along with other effects such as crack branching. The standard CZM has been found to overestimate crack speeds in the case of dynamic fracture [13]. The predicted crack speed can reach the Rayleigh surface wave speed C R of the material yet experimentally the maximum crack growth speed is significantly lower than C R even for very brittle materials [14].…”

Section: Introductionmentioning

confidence: 99%

“…A negative feature of these approaches however is unrealistically large values for the stress in the cohesive zone and associated crack arrest. A related but alternative approach is adopted by Valoroso et al [13] and Zhou et al [18] who employed a CZM with critical traction independent of rate but involving temporal changes in fracture energy along with critical separation. It is demonstrated in this paper however that this approach can lead to unrealistic separation values and crack tearing ahead of the crack tip.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Rate-dependent elastic and elasto-plastic cohesive zone models for dynamic crack propagation

Salih

Davey²,

Zou³

2016

International Journal of Solids and Structures

View full text Add to dashboard Cite

To overcome deficiencies with existing approaches a new cohesive zone model is introduced and trialled in this paper. The focus is on rate-dependent cohesive zone models which have appeared in the recent literature but can be shown to suffer unrealistic behaviour. Different combinations of material response are examined with rate effects appearing either in the bulk material or localised to the cohesive zone or in both. A benefit of using a cohesive-zone approach is the ability to capture plasticity and rate effects locally. Introduced is a categorisation of bulk-material responses and cohesive zone models with particular prominence to the role of rate and plasticity. The shape of the traction separation curve is shown to have an effect and captured in this paper with application of a trapezoidal cohesive zone model. Rate dependency for the cohesive zone model is introduced in terms of a ratedependent dashpot models applied either in parallel and/or in series. Traditionally, two possible methods are adopted to incorporate rate dependency, which are either via a temporal critical stress or a temporal critical separation. Applied singularly, tests reveal unrealistic crack behaviour at high loading rates. The new rate-dependent cohesive model introduced here couples the temporal responses of critical stress and critical displacement and is shown to provide for a stable realistic solution to dynamic fracture. Dynamic trials are performed on a cracked specimen to demonstrate the capability of the new approach.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rate-dependent elastic and elasto-plastic cohesive zone models for dynamic crack propagation

Salih

Davey²,

Zou³

2016

International Journal of Solids and Structures

View full text Add to dashboard Cite

show abstract

“…Therefore, the present study aimed to investigate bending–torsion fatigue fractures in order to establish the dependence between the loading scenario and the characteristic features of their surfaces. The literature describes the influence of loading conditions on the topography of fracture surfaces via either local terms (i.e., crack propagation and rupture) [ 34 , 35 , 36 , 37 , 38 ] or based on analysis of the total fracture area [ 39 , 40 ]. In this work, the results of both approaches (local and total fracture zones) for specimens with different geometries were compared for three materials.…”

Section: Introductionmentioning

confidence: 99%

Profile and Areal Surface Parameters for Fatigue Fracture Characterisation

et al. 2020

View full text Add to dashboard Cite

Post-mortem characterisation is a pivotal tool to trace back to the origin of structural failures in modern engineering analyses. This work compared both the crack propagation and rupture roughness profiles based on areal parameters for total fracture area. Notched and smooth samples made of weather-resistant structural steel (10HNAP), popular S355J2 structural steel and aluminium alloy AW-2017A under bending, torsion and combined bending–torsion were investigated. After the fatigue tests, fatigue fractures were measured with an optical profilometer, and the relevant surface parameters were critically compared. The results showed a great impact of the loading scenario on both the local profiles and total fracture areas. Both approaches (local and total fracture zones) for specimens with different geometries were investigated. For all specimens, measured texture parameters decreased in the following order: total area, rupture area and propagation area.

show abstract

“…Work in the open literature describes the influence of loading conditions on topography of fracture surfaces via either local terms, i.e. crack propagation and rupture [34][35][36][37][38], or based on the analysis of the total area of fracture [39,40]. In this work, the results of both approaches (local and total fracture zones) for specimens with different geometries are compared for three materials.…”

Section: Introductionmentioning

confidence: 99%

Profile and Areal Surface Parameters for Fatigue Fracture Characterisation

Macek

Branco

Szala

et al. 2020

Preprint

View full text Add to dashboard Cite

Post-mortem characterisation is a pivotal tool to trace back to the origin of structural failures in modern engineering analyses. This work presents a comparison of both the crack propagation profiles and the rupture roughness profiles based on areal parameters for total fracture area. Notched and smooth samples made of weather-resistant structural steel (10HNAP), popular S355J2 structural steel and aluminium alloy AA2017A under bending, torsion, and combined bending-torsion are investigated. After the fatigue tests, fatigue fractures are measured with an optical profilometer, and the relevant surface parameters are critically compared. The results show a great impact of the loading scenario on both the local profiles and the total fracture areas. In this work, the results of both approaches (local and total fracture zones) for specimens with different geometries are investigated. For all specimens, measured texture parameters decreased in the following order: total area, rupture area, and propagation area.

show abstract

A cohesive zone model with rate-sensitivity for fast crack propagation

Cited by 23 publications

References 12 publications

Rate-dependent elastic and elasto-plastic cohesive zone models for dynamic crack propagation

Rate-dependent elastic and elasto-plastic cohesive zone models for dynamic crack propagation

Profile and Areal Surface Parameters for Fatigue Fracture Characterisation

Profile and Areal Surface Parameters for Fatigue Fracture Characterisation

Contact Info

Product

Resources

About