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Updated: Jan 4, 2026
08:36
Fragility Assessment of Bovine Cortical Bone Using Scratch Tests
Published on: November 30, 2017
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Damage tolerance of lamellar bone
Hajar Razi1, Jožef Predan2, Franz Dieter Fischer3
1Max Planck Institute of Colloids and Interfaces, Department of Biomaterials, Research Campus Golm, 14424 Potsdam, Germany.
Bone
|November 1, 2019
Summary
Lamellar bone
Area of Science:
- Biomaterials Science
- Mechanics of Materials
- Skeletal Biology
Background:
- Lamellar bone is the typical cortical bone structure in mammals, offering strength and toughness.
- Microdamage in bone, appearing as whitening, enhances fracture toughness.
- Lamellar structures are found in bone, plants, and arthropod cuticles.
Purpose of the Study:
- To investigate crack propagation in lamellar bone using finite-element modeling.
- To understand how periodic variations in mechanical properties affect material behavior.
- To determine if lamellar structure enhances both strength and toughness.
Main Methods:
- Finite-element modeling of crack propagation.
- Simulation of materials with periodic variations in elastic modulus and strength.
- Analysis of microcrack formation and energy dissipation.
Main Results:
- Microcracks form ahead of the main crack tip, dissipating energy.
- Lamellar bone models show increased strength and toughness compared to homogeneous materials.
- Microcrack lengths correlate with lamellar width (microns).
Conclusions:
- The lamellar structure, with its microcracks, simultaneously improves bone strength and toughness.
- This biomimetic design explains the prevalence of lamellar plywood structures in nature.
- Understanding lamellar bone mechanics can inform biomaterial design.
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