Ratcheting-fatigue behavior of trabecular bone under cyclic tensile-compressive loading

Lin, Xianglong; Zhao, Jie; Gao, Lilan; Zhang, Chunqiu; Gao, Hong

doi:10.1016/j.jmbbm.2020.104003

Cited by 5 publications

(4 citation statements)

References 40 publications

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“…Similar to foam cracking, bone damage at the superior aspect of a subchondral void may contribute to the formation and persistence of bone voids in the horse. Although macrocracking is not a characteristic of clinically occurring MFC SCL, microcracks are the failure mode of trabecular bone under testing, 16,17 and these smaller cracks in the trabecular bone at the void margin may contribute to SCL formation. We propose that transcondylar screws may resist tension and thus inhibit crack formation to promote SCL healing.…”

Section: Discussionmentioning

confidence: 99%

“…The CDs were preloaded to 20 newtons (N), followed by linear ramped compressive loading at 20 N/s to a maximum load of 6000 N. Failure was defined as observable cracks in the CD (Figure 4). Cracks are the result of material failure and are the most common outcome measure of trabecular bone failure 16,17 . Cracks were apparent in 2 locations; in the foam at the top of the void (superior) or in the epoxy shell at the screw exit hole and included delamination of the exterior shell from the polycarbonate foam.…”

Section: Methodsmentioning

confidence: 99%

“…Cracks are the result of material failure and are the most common outcome measure of trabecular bone failure. 16,17 Cracks were apparent in 2 locations; in the foam at the top of the void (superior) or in the epoxy shell at the screw exit hole and included delamination of the exterior shell from the polycarbonate foam.…”

Section: Monotonic Testingmentioning

confidence: 99%

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The failure mode of a mechanically loaded equine medial femoral condyle analog with a void and the impact of lag and neutral screw placement

et al. 2022

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Objective: To determine the failure method of simulated equine medial femoral condyle (MFC) subchondral bone defects under compression and the influence of screw placement on failure resistance.Study Design: In vitro study. Sample Population: Composite disks (CD) simulating the moduli of yearling bone in the MFC. Methods: Four CD conditions were tested, all with a 12.7 mm void (n = 6 per condition): intact (no void), void only, void with a 4.5 mm screw placed in neutral fashion, and void with a 4.5 mm screw placed in lag fashion. Composite disks of each condition were tested under monotonic compression to 6000 N and cyclic compression to 10 000 cycles. Observable failure, load at first observable failure, and displacement at peak 2000 N load were compared among conditions.Results: Specimens failed by cracking at the superior aspect of the void or the screw exit hole. After monotonic loading, cracks were observed 6/6 CD with a void, 6/6 CD with a void/lag screw, and 5/6 CD with a void/neutral screw. After cyclical testing, cracks were noted only on the superior aspect of 6/6 CD with a void and 3/6 CD with a void/lag screw. Displacement at peak load was 0.06 mm (intact), 0.32 mm (void), 0.24 mm (void/lag screw), and 0.11 mm (void/neutral screw). Conclusion: Model MFC voids failed by superior cracking that was resisted by lag and neutral screw placement.Clinical Significance: Neutral screws may be an acceptable treatment for subchondral lucencies in the MFC.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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The failure mode of a mechanically loaded equine medial femoral condyle analog with a void and the impact of lag and neutral screw placement

et al. 2022

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“…Additionally, environmental factors play a significant role in determining the durability of mechanically one-way materials. Exposure to harsh conditions, such as extreme temperatures, humidity, or corrosive environments, can accelerate material degradation processes [27]. For example, moisture ingress into the material matrix can promote corrosion or hydrolysis reactions, leading to material weakening and degradation.…”

Section: Durability and Wearmentioning

confidence: 99%

Unleashing the Potential of Unidirectional Mechanical Materials: Breakthroughs and Promising Applications

Harripersad

2024

MSA

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The emergence of mechanically one-way materials presents an exciting opportunity for materials science and engineering. These substances exhibit unique nonreciprocal mechanical responses, enabling them to selectively channel mechanical energy and facilitate directed sound propagation, controlled mass transport, and concentration of mechanical energy amidst random motion. This article explores the fundamentals of mechanically one-way materials, their potential applications across various industries, and the economic and environmental considerations related to their production and use.

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Molecular dynamics simulations of tensile and creep-ratcheting behaviour of CNT reinforced columnar nanocrystalline Al nanocomposites

Biswajeet,

Babu,

Pal

2024

Diamond and Related Materials

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Ratcheting-fatigue behavior of trabecular bone under cyclic tensile-compressive loading

Cited by 5 publications

References 40 publications

The failure mode of a mechanically loaded equine medial femoral condyle analog with a void and the impact of lag and neutral screw placement

The failure mode of a mechanically loaded equine medial femoral condyle analog with a void and the impact of lag and neutral screw placement

Unleashing the Potential of Unidirectional Mechanical Materials: Breakthroughs and Promising Applications

Molecular dynamics simulations of tensile and creep-ratcheting behaviour of CNT reinforced columnar nanocrystalline Al nanocomposites

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