Time-lapse micro-CT analysis of fatigue microcrack propagation in cortical bone

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F20%3A00523137" target="_blank" >RIV/68378297:_____/20:00523137 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1088/1748-0221/15/03/C03031" target="_blank" >https://doi.org/10.1088/1748-0221/15/03/C03031</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1748-0221/15/03/C03031" target="_blank" >10.1088/1748-0221/15/03/C03031</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Time-lapse micro-CT analysis of fatigue microcrack propagation in cortical bone

Popis výsledku v původním jazyce

In this paper, a time-lapse micro-tomography (micro-CT) analysis has been used for identifying of fatigue microcracks in human cortical bone. A custom designed table-top loading device was employed for in-situ fatigue loading in an X-ray scanner. The initial defects (thin microcracks) in the bone were induced by the first loading step with a peak force sufficient for crack initiation. Then, the in-situ fatigue loading was performed to induce propagation of the microcracks. Loading increments of several thousand load cycles, with period of approximately four seconds were used to investigate the crack propagation phenomena. The fatigue testing was finished after approximately 13,000 cycles. The micro-CT scans were performed using a modular X-ray imaging device. During the entire experimental procedure, the in-situ loading device was mounted on a rotary stage of the X-ray scanner. The tested specimen was scanned using the highresolution micro-CT in the representative loading steps (before initiation of the microcracks, directly after the initiation and each time after a defined increment of fatigue cycles was reached). The individual micro-CT reconstructions of the specimen were processed using differential tomography for the identification of the individual microcracks in the microstructure and for the investigation of the recorded by the in-situ loading device during the fatigue testing and the damage development identified from the mechanical data was connected to the changes in the microstructure identified in the micro-tomography results.

Název v anglickém jazyce

Time-lapse micro-CT analysis of fatigue microcrack propagation in cortical bone

Popis výsledku anglicky

In this paper, a time-lapse micro-tomography (micro-CT) analysis has been used for identifying of fatigue microcracks in human cortical bone. A custom designed table-top loading device was employed for in-situ fatigue loading in an X-ray scanner. The initial defects (thin microcracks) in the bone were induced by the first loading step with a peak force sufficient for crack initiation. Then, the in-situ fatigue loading was performed to induce propagation of the microcracks. Loading increments of several thousand load cycles, with period of approximately four seconds were used to investigate the crack propagation phenomena. The fatigue testing was finished after approximately 13,000 cycles. The micro-CT scans were performed using a modular X-ray imaging device. During the entire experimental procedure, the in-situ loading device was mounted on a rotary stage of the X-ray scanner. The tested specimen was scanned using the highresolution micro-CT in the representative loading steps (before initiation of the microcracks, directly after the initiation and each time after a defined increment of fatigue cycles was reached). The individual micro-CT reconstructions of the specimen were processed using differential tomography for the identification of the individual microcracks in the microstructure and for the investigation of the recorded by the in-situ loading device during the fatigue testing and the damage development identified from the mechanical data was connected to the changes in the microstructure identified in the micro-tomography results.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20602 - Medical laboratory technology (including laboratory samples analysis; diagnostic technologies) (Biomaterials to be 2.9 [physical characteristics of living material as related to medical implants, devices, sensors])

Projekt

<a href="/cs/project/EF16_019%2F0000766" target="_blank" >EF16_019/0000766: Inženýrské aplikace fyziky mikrosvěta</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Instrumentation

ISSN

1748-0221

e-ISSN

—

Svazek periodika

15

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

C03031

Kód UT WoS článku

000528039600031

EID výsledku v databázi Scopus

2-s2.0-85084192771