Fracture behaviour analysis of artificial hip biomaterials

Čolić, Katarina

doi:10.2298/bg20121029colic

Cited by 2 publications

(5 citation statements)

References 32 publications

(37 reference statements)

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“…Having in mind the basic mechanical properties of Ti6Al4V alloy, Yield Strength 780 MPa, Tensile Strength 860 MPa, Young's modulus 120 GPa and Poisson's ratio 0,3 [13], one can correlate Yield Strength with the force 7,7 kN, which represents the loading at yielding initiation. This sets the upper limit for linear elastic behaviour of the hip implant made of Ti6Al4V alloy, which is used in this research.…”

Section: Resultsmentioning

confidence: 99%

“…The force on an implant during normal walking is cca 2,3 kN for a person of average weight (830 N), [10,13]. However, as the relevant load one should take into account the worst-case scenario -falling over an obstacle (stumbling), which corresponds to the force 6 kN for a person of average weight, [10,13].…”

Section: Figure 3 Iso Fatigue Test Arrangement For Hip Stemsmentioning

confidence: 99%

“…However, as the relevant load one should take into account the worst-case scenario -falling over an obstacle (stumbling), which corresponds to the force 6 kN for a person of average weight, [10,13].…”

Section: Figure 3 Iso Fatigue Test Arrangement For Hip Stemsmentioning

confidence: 99%

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Experimental and numerical research of mechanical behaviour of titanium alloy hip implant

et al. 2017

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Original scientific paper Experimental and numerical research of mechanical behaviour of hip replacement implant is presented. Experimental analysis was based on standard methods for testing mechanical properties and application of Digital Image Correlation (DIC) technique, while the Finite Element Method (FEM) was used for numerical simulation. A hip prosthesis extracted from a patient after revision surgery was used as the specimen. An adapter for the implant testing was constructed to enable the condition of a proximally loosened stem. During FEM analysis, a solid model was made of the assembly. An analysis of presented results indicated good agreement of experimental and numerical research. Keywords: biomedical implant; digital image correlation; finite element method; Ti-6Al-4V alloy Eksperimentalno i numeričko istraživanje mehaničkog ponašanja umjetnog kuka od legure titanaIzvorni znanstveni članak U ovom radu prikazano je eksperimentalno i numeričko istraživanje mehaničkog ponašanja umjetnog kuka od legure titana. Eksperimentalno istraživanje je bazirano na standardnim metodama ispitivanja mehaničkih svojstava i na primjeni tehnike digitalne korelacije slike, dok je metoda konačnih elemenata (MKE) primijenjena u numeričkim simulacijama. Umjetni kuk je izvađen iz pacijenta prilikom revizijske operacije kako bi se iskoristio kao uzorak za ispitvanja. Konstruiran je adapter za ispitivanje takvog uzorka kajo bi se dobili uvjeti što sličniji realnim. Za MKE analizu napravljen je model cijelog ispitivanog sklopa. Dobiveni rezultati ukazuju na dobru sukladnost eksperimentalnog i numeričkog istraživanja.Ključne riječi: digitalna korelacija slike; metoda konačnih elemenata; umjetni kuk

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Section: Resultsmentioning

confidence: 99%

Section: Figure 3 Iso Fatigue Test Arrangement For Hip Stemsmentioning

confidence: 99%

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Experimental and numerical research of mechanical behaviour of titanium alloy hip implant

et al. 2017

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“…The main concerns in hip joint design are fracture and fatigue‐related issues. Due to the difficulties in experimental work of fatigue and fracture mechanics in general, and to save time and money, applying numerical solutions is a must 15,16 …”

Section: Introductionmentioning

confidence: 99%

“…Due to the difficulties in experimental work of fatigue and fracture mechanics in general, and to save time and money, applying numerical solutions is a must. 15,16 Many studies prove that the extended finite element method (XFEM) gives a good simulation for predicting crack initiation and propagation. [17][18][19][20] Both experimental and numerical methods, especially XFEM, were implemented in the study, 18 and the results were in agreement and provided a reasonable explanation of failure.…”

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confidence: 99%

Failure assessment of hip stem due to pelvic positioning and femoral stem loosening

Framawy,

Abd‐Elhady,

Ahmad

et al. 2023

Fatigue Fract Eng Mat Struct

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The hip joint is subjected to different loads, leading to hip stem failure from the crack nucleation to the final implant failure. The main objective of the present work is to assess hip stem damage due to pelvic positioning and femur movement. The three‐dimensional finite element analysis (3D FEA) was created to simulate the artificial hip joint subjected to static or cyclic loading. The fatigue crack growth rate in the hip stem was investigated based on the extended finite element method (XFEM) with the cycle fatigue approach. The femoral stem loosening during adduction and abduction movements, which may have occurred, was considered. The numerical results showed that the von Mises stress value increases as the loosening distance increases, which appears with the decrease of the cup positioning angle. Furthermore, the pelvic positioning does not affect the crack initiation site, while the loosening and femur movement affect the crack initiation site. On the other hand, the fatigue crack growth rate was affected by pelvic positioning, loosening, and femur movement.

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Fracture behaviour analysis of artificial hip biomaterials

Cited by 2 publications

References 32 publications

Experimental and numerical research of mechanical behaviour of titanium alloy hip implant

Experimental and numerical research of mechanical behaviour of titanium alloy hip implant

Failure assessment of hip stem due to pelvic positioning and femoral stem loosening

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