Damage tolerance of lamellar bone

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Damage tolerance of lamellar bone. / Razi, Hajar; Predan, Jozef; Fischer, Franz-Dieter et al.
In: Bone, Vol. 130.2020, No. January, 115102, 24.10.2019.

Research output: Contribution to journalArticleResearchpeer-review

Harvard

Razi, H, Predan, J, Fischer, F-D & Fratzl, P 2019, 'Damage tolerance of lamellar bone', Bone, vol. 130.2020, no. January, 115102. https://doi.org/10.1016/j.bone.2019.115102

APA

Razi, H., Predan, J., Fischer, F.-D., & Fratzl, P. (2019). Damage tolerance of lamellar bone. Bone, 130.2020(January), Article 115102. Advance online publication. https://doi.org/10.1016/j.bone.2019.115102

Vancouver

Razi H, Predan J, Fischer FD, Fratzl P. Damage tolerance of lamellar bone. Bone. 2019 Oct 24;130.2020(January):115102. Epub 2019 Oct 24. doi: 10.1016/j.bone.2019.115102

Author

Razi, Hajar ; Predan, Jozef ; Fischer, Franz-Dieter et al. / Damage tolerance of lamellar bone. In: Bone. 2019 ; Vol. 130.2020, No. January.

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@article{a61cd41f52864b2f8e9f28c2ef974c6b,
title = "Damage tolerance of lamellar bone",
abstract = "Lamellar bone is known to be the most typical structure of cortical bone in large mammals including humans. This type of tissue provides a good combination of strength and fracture toughness. As has been shown by John D Currey and other researchers, large deformations are associated with the appearance of microdamage that optically whitens the tissue, a process that has been identified as a contribution to bone toughness. Using finite-element modelling, we study crack propagation in a material with periodic variation of mechanical parameters, such as elastic modulus and strength, chosen to represent lamellar bone. We show that a multitude of microcracks appears in the region ahead of the initial crack tip, thus dissipating energy even without a progression of the initial crack tip. Strength and toughness are shown to be both larger for the (notched) lamellar material than for a homogeneous material with the same average properties and the same initial notch. The length of the microcracks typically corresponds to the width of a lamella, that is, to several microns. This simultaneous improvement of strength and toughness may explain the ubiquity of lamellar plywood structures not just in bone but also in plants and in chitin-based cuticles of insects and arthropods.",
author = "Hajar Razi and Jozef Predan and Franz-Dieter Fischer and Peter Fratzl",
year = "2019",
month = oct,
day = "24",
doi = "10.1016/j.bone.2019.115102",
language = "English",
volume = "130.2020",
journal = "Bone",
issn = "8756-3282",
publisher = "Elsevier",
number = "January",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Damage tolerance of lamellar bone

AU - Razi, Hajar

AU - Predan, Jozef

AU - Fischer, Franz-Dieter

AU - Fratzl, Peter

PY - 2019/10/24

Y1 - 2019/10/24

N2 - Lamellar bone is known to be the most typical structure of cortical bone in large mammals including humans. This type of tissue provides a good combination of strength and fracture toughness. As has been shown by John D Currey and other researchers, large deformations are associated with the appearance of microdamage that optically whitens the tissue, a process that has been identified as a contribution to bone toughness. Using finite-element modelling, we study crack propagation in a material with periodic variation of mechanical parameters, such as elastic modulus and strength, chosen to represent lamellar bone. We show that a multitude of microcracks appears in the region ahead of the initial crack tip, thus dissipating energy even without a progression of the initial crack tip. Strength and toughness are shown to be both larger for the (notched) lamellar material than for a homogeneous material with the same average properties and the same initial notch. The length of the microcracks typically corresponds to the width of a lamella, that is, to several microns. This simultaneous improvement of strength and toughness may explain the ubiquity of lamellar plywood structures not just in bone but also in plants and in chitin-based cuticles of insects and arthropods.

AB - Lamellar bone is known to be the most typical structure of cortical bone in large mammals including humans. This type of tissue provides a good combination of strength and fracture toughness. As has been shown by John D Currey and other researchers, large deformations are associated with the appearance of microdamage that optically whitens the tissue, a process that has been identified as a contribution to bone toughness. Using finite-element modelling, we study crack propagation in a material with periodic variation of mechanical parameters, such as elastic modulus and strength, chosen to represent lamellar bone. We show that a multitude of microcracks appears in the region ahead of the initial crack tip, thus dissipating energy even without a progression of the initial crack tip. Strength and toughness are shown to be both larger for the (notched) lamellar material than for a homogeneous material with the same average properties and the same initial notch. The length of the microcracks typically corresponds to the width of a lamella, that is, to several microns. This simultaneous improvement of strength and toughness may explain the ubiquity of lamellar plywood structures not just in bone but also in plants and in chitin-based cuticles of insects and arthropods.

U2 - 10.1016/j.bone.2019.115102

DO - 10.1016/j.bone.2019.115102

M3 - Article

VL - 130.2020

JO - Bone

JF - Bone

SN - 8756-3282

IS - January

M1 - 115102

ER -