scholarly journals Hierarchical structure and mechanical properties of collagen in the intervertebral disc

1991 ◽  
Vol 19 (3) ◽  
pp. 331-331 ◽  
Author(s):  
James Joseph Cassidy ◽  
Anne Hiltner ◽  
Eric Baer
Keyword(s):  
Mechanical Properties ◽  
Intervertebral Disc ◽  
Hierarchical Structure

Relationship of hierarchical structure to mechanical properties

1999 ◽  
Vol 147 (1) ◽  
pp. 37-61 ◽  
Author(s):  
E. Baer ◽  
A. Hiltner ◽  
D. Jarus
Keyword(s):  
Mechanical Properties ◽  
Hierarchical Structure ◽  
Relationship Of

On the Mechanical Properties of the Human Intervertebral Disc.

1978 ◽  
Author(s):  
N. D. Panagiotacopulos ◽  
R. Bloch ◽  
W. G. Knauss ◽  
P. Harvey ◽  
M. Patzakis
Keyword(s):  
Mechanical Properties ◽  
Intervertebral Disc

Hierarchical structure and mechanical properties of snake (Naja atra) and turtle (Ocadia sinensis) eggshells

2016 ◽  
Vol 31 ◽  
pp. 33-49 ◽  
Author(s):  
Yin Chang ◽  
Po-Yu Chen
Keyword(s):  
Mechanical Properties ◽  
Hierarchical Structure ◽  
Naja Atra

Surface Texture and Mechanical Behavior of Claw Material in Beetle Dorcus titanus (Coleoptera: Lucanidae)

2013 ◽  
Vol 461 ◽  
pp. 305-312 ◽  
Author(s):  
Zhi Xian Yang ◽  
Ze Hua Liu ◽  
Zhen Dong Dai
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Hierarchical Structure ◽  
Surface Texture ◽  
Smooth Surface ◽  
Biological Materials ◽  
Industrial Products ◽  
Biomimetic Materials ◽  
Nanomechanical Properties ◽  
Synthetic Materials

Biomaterials have an integrated, hierarchical structure with outstanding mechanical properties which are far beyond those achieved by using the same synthetic materials. nanoindentation techniques have recently been adapted for studying the biological materials. In this paper, the surface texture and nanomechanical properties of claw material in beetle Dorcus titanus were investigated. It is founded that the claw possesses of an optimized shape as well as the non-smooth surface texture with many stripes like as the fullows close to the arc inside. The results of nanoindentation tests indicate that the modulus value of the claw cuticle near the tip (11.25±0.57 GPa) is over three times larger than that near the claw root (3.61±0.22 GPa) and there is an incremental hardness and modulus values from the claw root to the tip. Quantitive measurements on the nanomechanical properties of claw material could help to develop biomimetic materials suitable for industrial products.

Hierarchical structure, mechanical properties and fabrication of biomimetic biomaterials

2013 ◽  
pp. 67-90 ◽  
Author(s):  
R. Rabiei ◽  
A.K. Dastjerdi ◽  
M. Mirkhalaf ◽  
F. Barthelat
Keyword(s):  
Mechanical Properties ◽  
Hierarchical Structure

Mechanical Properties of the Human Elbow Bones Measured by Nanoindentation and Microindentation

2018 ◽  
Author(s):  
Dilpreet Singh ◽  
Pulak Mohan Pandey ◽  
Dinesh Kalyanasundaram
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Hierarchical Structure ◽  
Longitudinal Direction ◽  
Measurement Scales ◽  
Depth Of Penetration ◽  
Mechanical Environment ◽  
Physiological Loading ◽  
Bone Properties ◽  
Osteonal Bone

In this article, the nano and microhardness and the elastic modulus of the human elbow bones (humerus, ulna and radius) were studied. The nano properties were studied using load controlled technique with a load of 20 mN, while the micro properties were studied under 1 N load. A total of nine bone samples from three cadavers of ages between 45 and 55 years were tested. The measurements were carried out on both osteonal and interstitial bone in the longitudinal direction. The nanoindentation results indicated higher values for interstitial bone (hardness: 0.74 ± 0.09 GPa, elastic modulus: 19.05 ± 1.92 GPa) than for osteonal bone (hardness: 0.53 ± 0.05 GPa, elastic modulus: 16.66 ± 1.55 GPa). Consistent results were obtained at a depth of penetration between 1.1 μm to 1.5 μm in nanoindentation. In the case of microindentation, the microhardness and elastic modulus of interstitial bone was found to be 0.65 ± 0.07 GPa and 20.60 ± 2.27 GPa. Whereas for osteonal bone it was observed to be 0.60 ± 0.08 GPa and 14.56 ± 1.42 GPa respectively. The depth of penetration varies between the 8 μm to 11 μm for microindentation studies. In both measurement scales, a noticeable difference was observed between the osteonal and interstitial bone properties. As bone is a hierarchical structure, identifying the mechanical properties at the lamellar level helps in understanding the local mechanical environment of basic elements of the bones and predicting the behavior of the bone due to physiological loading.

Hierarchical Structure and Properties of Graphene Oxide Papers

2013 ◽  
Vol 80 (4) ◽  
Author(s):  
Charles D. Wood ◽  
Marc J. Palmeri ◽  
Karl W. Putz ◽  
Zhi An ◽  
SonBinh T. Nguyen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Structural Feature ◽  
Uniaxial Tension ◽  
Hierarchical Structure ◽  
Mechanical Response ◽  
Structure And Properties ◽  
Fracture Surfaces ◽  
High Stiffness ◽  
Significant Attention

The mechanical properties of graphene oxide papers have attracted significant attention in recent years due to their high stiffness and tough behavior. While the structural feature most commonly characterized is the nanosheet spacing, there is a hierarchical structure, which is likely responsible for the impressive mechanical properties. In this paper, we examine the structure of graphene oxide papers on several length scales using novel techniques to distinguish between lamellae and a newly defined feature, termed “super-lamellae.” The differentiation between these intermediate features provides context to the previously observed mechanical response and fracture surfaces of graphene oxide papers, particularly under uniaxial tension.

Fractals to Model Hierarchical Biomaterials

2008 ◽  
Vol 58 ◽  
pp. 54-59 ◽  
Author(s):  
Alberto Carpinteri ◽  
Pietro Cornetti ◽  
Nicola Maria Pugno ◽  
Alberto Sapora
Keyword(s):  
Mechanical Properties ◽  
Hierarchical Structure ◽  
Length Scale ◽  
Primary Concern ◽  
New Materials ◽  
New Model ◽  
Hierarchical Materials ◽  
Fractal Approach ◽  
Recursive Formulas ◽  
Strength And Stiffness

Many biological materials exhibit a hierarchical structure over more than one length scale. Understanding how hierarchy affects their mechanical properties emerges as a primary concern, since it can guide the synthesis of new materials to be tailored for specific applications. In this paper the strength and stiffness of hierarchical materials are investigated by means of a fractal approach. A new model is proposed, based both on geometric and material considerations and involving simple recursive formulas.

scholarly journals Hierarchical Characterization and Nanomechanical Assessment of Biomimetic Scaffolds Mimicking Lamellar Bone via Atomic Force Microscopy Cantilever-Based Nanoindentation

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1257 ◽  
Author(s):  
Brian Wingender ◽  
Yongliang Ni ◽  
Yifan Zhang ◽  
Curtis Taylor ◽  
Laurie Gower
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Hierarchical Structure ◽  
Liquid Crystalline ◽  
Structural Motif ◽  
Positive Trend ◽  
Bovine Bone ◽  
Lamellar Bone ◽  
Force Microscopy ◽  
Atomic Force

The hierarchical structure of bone and intrinsic material properties of its two primary constituents, carbonated apatite and fibrillar collagen, when being synergistically organized into an interpenetrating hard-soft composite, contribute to its excellent mechanical properties. Lamellar bone is the predominant structural motif in mammalian hard tissues; therefore, we believe the fabrication of a collagen/apatite composite with a hierarchical structure that emulates bone, consisting of a dense lamellar microstructure and a mineralized collagen fibril nanostructure, is an important first step toward the goal of regenerative bone tissue engineering. In this work, we exploit the liquid crystalline properties of collagen to fabricate dense matrices that assemble with cholesteric organization. The matrices were crosslinked via carbodiimide chemistry to improve mechanical properties, and are subsequently mineralized via the polymer-induced liquid-precursor (PILP) process to promote intrafibrillar mineralization. Neither the crosslinking procedure nor the mineralization affected the cholesteric collagen microstructures; notably, there was a positive trend toward higher stiffness with increasing crosslink density when measured by cantilever-based atomic force microscopy (AFM) nanoindentation. In the dry state, the average moduli of moderately (X51; 4.8 ± 4.3 GPa) and highly (X76; 7.8 ± 6.7 GPa) crosslinked PILP-mineralized liquid crystalline collagen (LCC) scaffolds were higher than the average modulus of bovine bone (5.5 ± 5.6 GPa).

In vitro comparison between mechanical properties and elastographic characterization of porcine intervertebral disc

2015 ◽  
Vol 18 (sup1) ◽  
pp. 1906-1907
Author(s):  
Y. Chotar-Vasseur ◽  
T. Cachon ◽  
B. Ponsard ◽  
C. Carozzo ◽  
E. Viguier
Keyword(s):  
Mechanical Properties ◽  
Intervertebral Disc ◽  
In Vitro Comparison
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