Combined numerical and experimental mechanical characterization of a calcium phosphate ceramic using modified Brazilian disc and SCB specimen

Elghazel, Achouak; Taktak, Rym; Bouaziz, Jamel

doi:10.1016/j.msea.2016.06.020

Cited by 18 publications

(11 citation statements)

References 46 publications

(60 reference statements)

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“…The SCB specimen has a simple geometry, loading arrangement, the capability of applying various mode mixity by changing the pre-crack inclination angle relative to the applied load Chong & Kuruppu, 1984;Kuruppu & Chong, 2012;Rashidi Moghaddam et al, 2017). It provides a simple and effective technique for conducting mixed mode fracture tests in brittle materials (Aliha et al, 2010Elghazel et al, 2016;Ameri et al, 2012Ameri et al, , 2016Fathipour Azar et al, 2015;Kataoka et al, 2017;Wei et al, 2016Aliha & Ayatollahi, 2013Aliha & Saghafi, 2013;Aliha & Fattahi Amirdehi, 2017;Fakhri et al, 2018;Roy et al, 2017a,b;Abd-Elhady 2013;Mirsayar et al, 2017;Funatsu et al, 2014;Artamendi & Khalid, 2006). Nevertheless, the crack properties such as location, size, inclination and loading configuration have a pronounced effect on the crack extension.…”

Section: Introductionmentioning

confidence: 99%

Numerical evaluation of mode I/II SIF of quasi-brittle materials using cracked semi-circular bend specimen

Fayed¹

2018

10.5267/j.esm

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An in-house finite element code was utilized to evaluate mode I/II stress intensity factor (SIF) of an edge cracked semi-circular disc subjected to three-point bending. The specimen was considered as an isotropic and homogeneous material. Relative span length ratios of 0.3 to 0.8 in steps of 0.1 were invoked. Relative crack length ratios of 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6 were analyzed with crack angles up to 60° in steps of 5°. At the same crack length, mode I SIF decreases with increasing crack angle or decreasing the span length. The range of pure mode II decreases with increasing the span length. For the same crack length, the crack angle corresponding to the transition from a mixed mode I/II to a pure mode II increases with increasing the relative span length ratio. On the contrary, that angle decreases with increasing the crack length for the same span length. Good agreement has been generally obtained with relevant results found in the literature.

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Section: Introductionmentioning

confidence: 99%

Numerical evaluation of mode I/II SIF of quasi-brittle materials using cracked semi-circular bend specimen

Fayed¹

2018

10.5267/j.esm

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“…In this regard, amongst the well‐known test specimens is the centrally cracked Brazilian disc (CCBD) under a concentrated diametrically compressive load. It provides a simple and effective technique to evaluate in‐plane shear and mixed mode I/II fracture of different materials …”

Section: Introductionmentioning

confidence: 99%

“…It provides a simple and effective technique to evaluate in-plane shear and mixed mode I/II fracture of different materials. [10][11][12][13][14][15][16][17][18] The CCBD specimen has a simple geometry and loading arrangement and, further, the capability of applying various mixed modes by changing the precrack inclination angle relative to the applied diametric load. For an inclined crack in compression, different regimes of contact between its surfaces can arise.…”

Section: Introductionmentioning

confidence: 99%

Modes I/II SIF of a diametrically compressed Brazilian disc having a central inclined crack with frictional surfaces

Hammouda

Fayed

2017

Fatigue Fract Eng Mat Struct

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An in‐house finite element code was used to analyse a diametrically compressed isotropic homogeneous Brazilian disc having a central inclined crack with frictional surfaces for the evaluation of its corresponding modes I and II stress intensity factor (SIF). One‐half of the disc was successfully idealized. The coefficient of friction between the crack surfaces ranged from 0 to 1 in steps of 0.1. Relative crack length ratios of 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, and 0.7 were analysed with crack angles up to 90° in steps of 5°. The crack angle corresponding to the transition from a mixed mode I/II to a pure mode II decreases with increasing the relative crack length ratio. An increase in the relative crack length ratio leads to an increase in the range of crack angles corresponding to a partially closed crack. The crack angle at which fully closed sliding crack surfaces commences is 30° independent of the relative crack length ratio and the friction coefficient. With the same relative crack length ratio and increasing the friction coefficient, there is a corresponding decrease in the crack angle for the maximum mode II SIF. With a decrease in the relative crack length ratio or the friction coefficient, the crack angle beyond which the crack surfaces become in a fully sticking mode decreases resulting in zero mode II SIF. Generally, mode II SIF decreases with increasing the friction coefficient between the crack surfaces. Good agreement has been generally obtained with relevant results found in the literature.

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“…However, it appeared that the resorption rate of this bioceramic was far too low to induce neobone formation after 12 weeks postimplantation. Despite these results, the proposed material presented markedly better mechanical properties than monophasic β-TCP [14]. Hence, the incorporated fluorapatite can be used to modulate the biological and the mechanical properties.…”

Section: Histological Analysismentioning

confidence: 77%

“…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]. Pure fluorapatite is known to possess a potential advantage with its high chemical stability and aptitude to delay caries' process without the biocompatibility degradation [15].…”

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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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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Combined numerical and experimental mechanical characterization of a calcium phosphate ceramic using modified Brazilian disc and SCB specimen

Cited by 18 publications

References 46 publications

Numerical evaluation of mode I/II SIF of quasi-brittle materials using cracked semi-circular bend specimen

Numerical evaluation of mode I/II SIF of quasi-brittle materials using cracked semi-circular bend specimen

Modes I/II SIF of a diametrically compressed Brazilian disc having a central inclined crack with frictional surfaces

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

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