Determination of elastic modulus, tensile strength and fracture toughness of bioceramics using the flattened Brazilian disc specimen: analytical and numerical results

Elghazel, Achwek; Taktak, Rym; Bouaziz, Jamel

doi:10.1016/j.ceramint.2015.06.063

Cited by 24 publications

(7 citation statements)

References 19 publications

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“…This later was optimized based on thermal analysis [28]. Based on previous studies [13], the composite samples were sintered at 1300°C for 90 nm. Helium porosimetry and the Archimedes method were used for investigating density and porosity (both open and closed) of sintered samples.…”

Section: Methodsmentioning

confidence: 99%

“…Hence, there was a need for maximizing mechanical properties of tricalcium phosphate β-TCP suitable for orthopedic applications. In recent investigation, a β-TCP-fluorapatite (Fap) composite has been developed for biomedical applications [13]. These β-TCP-Fap have shown a good combination of compressive strength (95 MPa), flexural strength (15 MPa), and fracture toughness (2.9 MPa m 1/2 ) [14].…”

Section: Introductionmentioning

confidence: 99%

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TCP-Fluorapatite Composite Scaffolds: Mechanical Characterization and In Vitro/In Vivo Testing

Elghazel¹,

Taktak²,

Bouaziz³

et al. 2017

Scaffolds in Tissue Engineering - Materials, Technologies and Clinical Applications

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In the present paper, we investigate the biological performance of the tricalcium phosphate ceramic (β-TCP) bone substitute combined with the fluorapatite (Fap). Porous biocomposites consisting of β-tricalcium phosphate (β-TCP) with 26.5% fluorapatite (Fap) were elaborated and characterized in order to evaluate its potential application in bone graft substitute. Bioactivity was determined with in vivo and in vitro tests by immersion of samples in simulated fluid body (SBF) for several periods of time. Clinical, radiological, and histological assessments were then carried out to evaluate the biological properties of developed β-TCP-26.5% Fap composites. An in vivo investigation revealed the biological properties of the prepared macroporous scaffolds, namely, biocompatibility, bioactivity, biodegradability, and osteoconductivity. The morphological characteristics, granule size, and chemical composition were indeed found to be favorable for osseous cell development. All histological observations of the preliminary in vivo study in the tibia of rabbits proved the biocompatibility and the resorption of the investigated bioceramic. In contrast, the implantation period will have to be optimized by further extensive animal experiments.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

TCP-Fluorapatite Composite Scaffolds: Mechanical Characterization and In Vitro/In Vivo Testing

Elghazel¹,

Taktak²,

Bouaziz³

et al. 2017

Scaffolds in Tissue Engineering - Materials, Technologies and Clinical Applications

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“…Jedna od indirektnih metoda za ispitivanje zatezne čvrstoće materijala je Brazilski disk test. Brazilski test se široko koristi za ispitivanje zatezne čvrstoće i žilavosti neorganskih i krtih materijala poput stena, betona [14], biokeramike [15] i drugih sličnih materijala [16,17]. Šema postavke uzorka u obliku diska za ispitivanje brazilskim testom sa pravcem dejstva sile, prikazana je na slici 1 [18].…”

Section: Uvodunclassified

Examination of mechanical properties of acrilyc composite materials with different AL2O3 reinforcement by brazil test

Vuksanović¹,

Tomić²,

Algellai³

et al. 2019

Tehnika

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Kompozitni materijali na bazi fotopolimerizujućih akrilata i različitih ojačanja na bazi aluminijumoksida predstavljaju materijal koji je pogodan za upotrebu u stomatologiji, ali i u drugim oblastima. Kompoziti su napravljeni korišćenjem četiri različita tipa ojačanja hemijski veoma sličnih sastava, ali različite veličine i morfologije. Da bi se pratila mehanička svojstva kompozitnog materijala napravljeni su uzorci u formi diskova definisanih dimenzija pogodni za polimerizaciju pod dejstvom UV svetlosti. Predmet ovog istraživanja je ispitivanje mehaničkih svojstava fotopolimerizujućeg kompozitnog materijala na bazi Bis-GMA (Bisfenol A glicidilmetakrilata)/TEGDMA (trietilen glikol dimetakrilata) kao matrice. Ojačanja su bila u formi komercijalnih nanočestica i viskersa aluminijum-oksida i njihov uticaj na mehanička svojstva upoređen je sa uticajem sintetisanih čestica na bazi aluminijum-oksida dopiranih gvožđe oksidom sintetisanih sol gel tehnikom. Za ispitivanje mehaničkih svojstava kompozitnih materijala korišćen je Brazilski test i ispitivanje tvrdoće uzoraka.

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“…Because of the difficulty in processing precision of CCNBD, a cracked straight through Brazilian disc (CSTBD) was proposed to determine the fracture toughness of rock [4][5]. And then, the CSTBD was widely used to study the dynamic and static fracture toughness of rock and some useful consequences were gained [6][7][8][9]. It was suggested that the test of CSTBD was an effective method to determine the Mode I fracture toughness of rock.…”

Section: Introductionmentioning

confidence: 99%

“…(7). The elastic modulus, E, and Poisson ratio,, of this kind of rock-like material were determined by experiments as E=4.68 GPa and =0.22.…”

mentioning

confidence: 99%

Experimental study on Mode I fracture of cracked straight through the square specimen (CSTSS)

Zhang

Wang

2020

mech

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Analytical solution of tensile stress of square specimen under splitting load was obtained through Fourier Series Solution of plane stress problems. According to the stress distribution of the un-cracked square specimen, the calculation formula of Mode I fracture toughness of cracked straight through the square specimen, CSTSS, under splitting load was obtained, and the shape function was corrected by the finite element interaction integration method. In order to verify the correctness of the formula, a CSTSS splitting test was performed. The test results indicated that the stress distribution on the axis of symmetry is consistent with the theoretical results, and the minimum tensile stress occurs at the center point of the un-cracked specimens. The Mode I fracture toughness of CSTSS, KIC, was stabilized in relative range and the average value of KIC was 0.140MPa×m1/2. The three-point-bend experiment was introduced as a comparative test and the average value of KIC was 0.158MPa×m1/2 which was slightly larger than that of CSTSS. The test results indicated that both of the two tests could be reliable and the CSTSS under splitting load could be a potential method to determine the Mode I fracture toughness of rock.

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Determination of elastic modulus, tensile strength and fracture toughness of bioceramics using the flattened Brazilian disc specimen: analytical and numerical results

Cited by 24 publications

References 19 publications

TCP-Fluorapatite Composite Scaffolds: Mechanical Characterization and In Vitro/In Vivo Testing

TCP-Fluorapatite Composite Scaffolds: Mechanical Characterization and In Vitro/In Vivo Testing

Examination of mechanical properties of acrilyc composite materials with different AL2O3 reinforcement by brazil test

Experimental study on Mode I fracture of cracked straight through the square specimen (CSTSS)

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