Modeling Mode I Fracture of Bitumen Films

Portillo, O.; Cebon, David

doi:10.1061/(asce)mt.1943-5533.0000561

Cited by 9 publications

(2 citation statements)

References 19 publications

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“…In the ductile regime, the peak cohesive stress was calculated using the extended MCM of Ossa et al (2005) (Equation (11), with q ¼ 1). This methodology is consistent with the cohesive stress variation used in the CZMs in other work for double cantilever beams and SE (B) tests on pure bitumen, see (Portillo 2009, Portillo and Cebon 2013a, 2013b for details. The elastic stiffness was set to be K 0 n ¼ 5 GPa (K 0 n ¼ t 0 n T 0 =d 0 n , where T 0 is the original thickness of the cohesive element).…”

Section: Fe Modelsupporting

confidence: 80%

Fracture mechanics of idealised bituminous mixes

Portillo¹,

Cebon

2014

International Journal of Pavement Engineering

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The durability of asphalt pavements is strongly impaired by cracks, caused primarily by traffic loads and environmental effects. In this work, fracture behaviour of idealised asphalt mixes is investigated. Experiments on idealised asphalt mixes under pure-tension mode (mode I cracking) were performed and fracture parameters were evaluated. In these three-point bend fracture tests, the test variables were temperature and load rate. The test data were stored in an asphalt materials database and special-purpose tools were implemented to analyse and handle the laboratory data automatically. Fracture mechanism maps were constructed, showing the conditions associated with ductile, brittle and ductile -brittle transition regimes of behaviour. The mechanism maps show the failure response of the material in terms of the stress intensity factor, strain energy release rate and J-integral as a function of the temperature-compensated crack mouth opening strain rate. Fracture behaviour of asphalt mix specimens was simulated by cohesive zone model in conjunction with a novel material constitutive model for asphalt mixes. The finite element model agrees well with the experimental results and provides insights into fracture response of the notched asphalt mix beam specimens.

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Section: Fe Modelsupporting

confidence: 80%

Fracture mechanics of idealised bituminous mixes

Portillo¹,

Cebon

2014

International Journal of Pavement Engineering

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“…Furthermore, according to some analyses available in the literature, the SIF becomes more by increasing the stiffness or elastic modulus of bitumen used in the composition of two-phase aggregate/mastic composite structure. 52,53 As it is well understood and has been reported in previous papers, 8,9,12,13,31,[54][55][56][57][58] the asphalt binder as a viscoelastic material becomes more stiff at subzero temperatures up to the lower PG limit of the bitumen that is related to the glass temperature of binder material. Hence, for the bitumen material used in the current research with PG , it is expected to observe an enhancement on the overall strength and load carrying capacity of binder and consequently the whole asphalt mixture.…”

Section: Resultsmentioning

confidence: 95%

K_IcandK_IIcmeasurement for hot mix asphalt mixtures at low temperature: Experimental and theoretical study using the semicircular bend specimen with different thicknesses

Yuan

Tian

Liu

et al. 2020

Fatigue Fract Eng Mat Struct

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Pure mode I and mode II fracture toughness of asphalt mixture was investigated both experimentally and theoretically using vertical edge crack semicircular bend (SCB) specimen with symmetric and asymmetric bottom loading spans. The thickness of SCB specimen was considered in the range from 30 to 70 mm, and the fracture toughness tests were performed at three subzero temperatures (−5 C, −15 C and −25 C). The results showed that K Ic and K IIc are increased by reducing the test temperature. The thickness had no sound effect on the fracture toughness, but the thickness of 50 mm was more suitable for fracture study on this material. The fracture load of mode II specimen was significantly greater than the mode I fracture load at the same testing condition. The fracture toughness ratio (K IIc /K Ic) that varies in the range between 1 and 1.4 was predicted theoretically using three well-known stress/strainbased fracture criteria. K E Y W O R D S asphalt mixture, fracture toughness ratio prediction, K Ic and K IIc value, low temperature, symmetric and asymmetric SCB specimens, thickness effect

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Direct Extraction of Mode I and Mode II Traction–Separation Relationships of Polymer Modified Bitumen Using Rigid Cantilever Beam Experiments Combined with StereoDIC

Rajan

Myers

Sutton

2021

Challenges in Mechanics of Time Dependent Materials, Volume 2

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Modeling Mode I Fracture of Bitumen Films

Cited by 9 publications

References 19 publications

Fracture mechanics of idealised bituminous mixes

Fracture mechanics of idealised bituminous mixes

K_IcandK_IIcmeasurement for hot mix asphalt mixtures at low temperature: Experimental and theoretical study using the semicircular bend specimen with different thicknesses

Direct Extraction of Mode I and Mode II Traction–Separation Relationships of Polymer Modified Bitumen Using Rigid Cantilever Beam Experiments Combined with StereoDIC

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Modeling Mode I Fracture of Bitumen Films

Cited by 9 publications

References 19 publications

Fracture mechanics of idealised bituminous mixes

Fracture mechanics of idealised bituminous mixes

KIcandKIIcmeasurement for hot mix asphalt mixtures at low temperature: Experimental and theoretical study using the semicircular bend specimen with different thicknesses

Direct Extraction of Mode I and Mode II Traction–Separation Relationships of Polymer Modified Bitumen Using Rigid Cantilever Beam Experiments Combined with StereoDIC

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K_IcandK_IIcmeasurement for hot mix asphalt mixtures at low temperature: Experimental and theoretical study using the semicircular bend specimen with different thicknesses