Concrete Fracture Models and Applications

Kumar, Shailendra; Barai, Sudhirkumar V.

doi:10.1007/978-3-642-16764-5

Cited by 62 publications

(80 citation statements)

References 8 publications

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“…It was recently realized that the fracture process zone was created ahead of the crack in concrete. As a result, the non-linear fracture mechanics [17] was introduced instead of the linear elastic fracture mechanics (LEFM). Although most efforts have been lately devoted to study on fracture damage behaviour of concrete [18,19], linear elastic fracture mechanics seems to be still useful for studying the failure of concrete.…”

Section: Linear Elastic Fracture Mechanicmentioning

confidence: 99%

Determination of Stress Intensity Factor in Concrete Material Under Brazilian Disc and Three-Point Bending Tests Using Finite Element Method

Benarbia¹,

Benguediab²

2015

Period. Polytech. Mech. Eng.

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Section: Linear Elastic Fracture Mechanicmentioning

confidence: 99%

Determination of Stress Intensity Factor in Concrete Material Under Brazilian Disc and Three-Point Bending Tests Using Finite Element Method

Benarbia¹,

Benguediab²

2015

Period. Polytech. Mech. Eng.

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“…In principle, a double-K fracture model 4 combines the concept of cohesive forces acting on the faces of cracks during a fictitious (effective) crack increment with the criterion based on the stress-intensity factor.…”

Section: Double-k Fracture Modelmentioning

confidence: 99%

“…In this paper, three-point-bending fracture tests were conducted on the above-mentioned specimens, which were evaluated using a double-K fracture model 4 . The advantage of this model is that it describes different levels of crack propagation: the initiation which corresponds with the beginning of a stable crack growth (at the level where the stress inten-sity factor K Ic ini is reached) and the part featuring an unstable crack propagation (after the unstable-fracture toughness K Ic un has been reached).…”

Section: Introductionmentioning

confidence: 99%

Modified cement-based mortars: crack initiation and volume changes

Havlíková¹,

Bílek²,

Topolář³

2015

Mater. Tehnol.

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The aim of this paper was to quantify the crack initiation and volume changes of three types of fine-grain cement-based composites: the reference one including Portland cement only and the other two with the mass fraction 20 % of Portland cement replaced by granulated blast-furnace slag or pulverized-coal fly ash. Half of the specimens from each mixture were cured according to ASTM C1260-94 and ASTM C1567-07, other specimens were cured in water. The length changes were measured during the curing (a test for the risk of the alkali-silica reactivity). Furthermore, a three-point-bending test was performed on these specimens to obtain the fracture parameters, which were determined using a double-K fracture model. It was found that the type of specimen curing has a significant effect on the volume changes and a moderate influence on the elasticity modulus, the crack initiation and fracture-toughness values. Keywords: cement-based composite, slag, fly ash, alkali-silica reaction, crack initiation, double-K fracture model Namen tega~lanka je oceniti iniciacijo razpoke in spremembe volumna treh vrst drobnozrnatih kompozitov na osnovi cementa: osnovna samo s cementom Portland, pri drugih dveh je bil masni dele`20 % cementa Portland nadome{~en z granulirano plav`no`lindro ali s prahom elektrofiltrskega pepela premoga. Polovica vzorcev iz vsake me{anice je bila strjena skladno z ASTM C1260-94 in ASTM C1567-07, drugi vzorci so bili strjeni v vodi. Med strjevanjem je bilo merjeno spreminjanje dol`ine (preizkus za rizik reaktivnosti alkalija-silicijev dioksid). Poleg tega je bil izvr{en pri teh vzorcih trito~kovni upogibni preizkus, da bi dobili parameter preloma, kar je bilo dolo~eno z uporabo lomnega modela z dvojnim K. Ugotovljeno je bilo, da ima na~in strjevanja vzorcev mo~an vpliv na spremembe volumna in zmeren vpliv na modul elasti~nosti, na iniciacijo razpoke, kot tudi na vrednosti lomne`ilavosti. Klju~ne besede: kompozit na osnovi cementa,`lindra, lete~i pepel, reakcija med alkalijami in silicijevim dioksidom, iniciacija razpoke, lomni model z dvojnim K

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“…It is widely accepted that several parameters determine the roughness and texture of the fracture surface of concrete. The properties of aggregate particles such as size, texture and angularity, and the concrete mix design significantly influence the meandering of main crack, which in turn produce tortuous or much less tortuous fracture surfaces [3].…”

Section: Introductionmentioning

confidence: 99%

“…The type of crack propagation influences the energy consumption and correspondingly the type of failure during the fracture process. Micro-cracking, crack bridging and aggregate interlocking are the major toughening mechanisms during this process and play a crucial role on the tendency of the main crack to follow a tortuous crack path [3,4].…”

Section: Introductionmentioning

confidence: 99%