Abstract：
:The turtle shell is a functional bio-shielding element, which has evolved naturally to provide protection against predator attacks that involve biting and clawing. The near-surface architecture of the turtle shell includes a soft bi-layer skin coating - rather than a hard exterior - which functions as a first line of defense against surface damage. This architecture represents a novel type of bio-shielding configuration, namely, an inverse structural-mechanical design, rather than the hard-coated bio-shielding elements identified so far. In the current study, we used experimentally based structural modeling and FE simulations to analyze the mechanical significance of this unconventional protection architecture in terms of resistance to surface damage upon extensive indentations. We found that the functional bi-layer skin of the turtle shell, which provides graded (soft-softer-hard) mechanical characteristics to the bio-shield exterior, serves as a bumper-buffer mechanism. This material-level adaptation protects the inner core from the highly localized indentation loads via stress delocalization and extensive near-surface plasticity. The newly revealed functional bi-layer coating architecture can potentially be adapted, using synthetic materials, to considerably enhance the surface load-bearing capabilities of various engineering configurations.
journal_name
J Mech Behav Biomed Materauthors
Shelef Y,Bar-On Bdoi
10.1016/j.jmbbm.2017.01.019subject
Has Abstractpub_date
2017-09-01 00:00:00pages
68-75eissn
1751-6161issn
1878-0180pii
S1751-6161(17)30026-7journal_volume
73pub_type
杂志文章abstract：:The lumbar facet capsular ligament (FCL) articulates with six degrees of freedom during spinal motions of flexion/extension, lateral bending, and axial rotation. The lumbar FCL is composed of highly aligned collagen fiber bundles on the posterior surface (oriented primarily laterally between the rigid articular facets...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2016.08.019
更新日期：2017-01-01 00:00:00
abstract：:With the aim to prepare antibacterial acrylic bone cements, a series of imidazolium-containg mono-methacrylates with N-alkyl chain length varied from 10 to 18 (MEIM-x) were synthesized as polymerizable antibacterial agents through a two-step reaction. The structures of the monomers were confirmed by 1H NMR. Methyl met...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2017.06.003
更新日期：2017-10-01 00:00:00
abstract：:Geometric confinement to the nanoscale, a concept that refers to the characteristic dimensions of structural features of materials at this length scale, has been shown to control the mechanical behavior of many biological materials or their building blocks, and such effects have also been suggested to play a crucial r...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2012.12.005
更新日期：2013-04-01 00:00:00
abstract：:Endodontically-treated teeth are prone to fracture due to loss of tooth structure and altered mechanical behaviors. The stability and rigidity of post-restored teeth, particularly in cases involving periodontal destruction, has not been adequately investigated. This study examined the influence of post material on tee...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2010.10.012
更新日期：2011-04-01 00:00:00
abstract：:We report linear and non-linear shear tests on rat skin, evidencing a strain-softening regime, from 1% to 50% strain, followed by a strong strain-hardening regime, leading to a 'deck chair-shaped' stress-strain curve. The strain-softening regime was never reported as such in the literature, possibly mistaken for the l...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2016.12.021
更新日期：2017-05-01 00:00:00
abstract：:Despite some previous work on the morphology and mechanical properties of parts of the insect exoskeleton, there is very little known about how these properties change over time during the life of the insect. We examined the hind tibia of the adult desert locust (Schistocerca gregaria) as a function of time up to 63 d...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2017.02.008
更新日期：2017-04-01 00:00:00
abstract：:The current study deals with the preparation and the characterization of the PVA-CMT-GO films. The PVA-CMT film was translucent in nature and smooth to touch. The addition of GO resulted in the formation of agglomerated structures. XRD studies suggested that the incorporation of GO increased the average crystallite si...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2018.02.021
更新日期：2018-05-01 00:00:00
abstract：:The Zn-based alloys, alloyed with the elements of the 2nd group of the periodic table, are considered as potential biodegradable materials suitable for the fabrication of small orthopaedic implants or cardiovascular stents. Unfortunately, the as-cast Zn-based alloys do not fulfil the requirements for mechanical proper...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2020.103796
更新日期：2020-08-01 00:00:00
abstract：OBJECTIVES:The deviation and spread of values measured by tensile strength tests should be significantly reduced by optimized axially pull-off-device. MATERIAL AND METHODS:Factors like geometry, roughness, surface texture and fit of the specimens, the luting procedure (mixing ratio, compacting pressure) were standardi...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2018.07.003
更新日期：2018-11-01 00:00:00
abstract：:Superelastic wires and diamond-shaped stent surrogates were manufactured from Nitinol rods and tubing, respectively, from five different mill product suppliers - Standard VAR, Standard VIM, Standard VIM+VAR, Process-Optimized VIM+VAR, and High-Purity VAR. High-cycle fatigue tests up to 10(7) cycles were conducted unde...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2015.07.003
更新日期：2015-11-01 00:00:00
abstract：:Proper statistical analysis is essential in the research studies. In particular, as regards the in vitro testing of the lumbar spine, the criteria for the standardization have been extensively discussed but the use of statistics has not been reviewed. Unfortunately, cadaveric testing is a very difficult and complex ex...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2020.103862
更新日期：2020-10-01 00:00:00
abstract：:Understanding the constitutive behavior of the human brain is critical to interpret the physical environment during neurodevelopment, neurosurgery, and neurodegeneration. A wide variety of constitutive models has been proposed to characterize the brain at different temporal and spatial scales. Yet, their model paramet...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2017.07.014
更新日期：2017-10-01 00:00:00
abstract：:An unusual type of mechanical behavior was registered while studying the swollen hydrogel compositions "cellulose-polyacrylamide" in the conditions of multiple cyclic compression tests with the broad variation of the deformation speed. While increasing the deformation rate the clearly seen inversion of the positions o...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2017.03.030
更新日期：2017-07-01 00:00:00
abstract：:Hydroxyapatite (HAP) is a natural bioceramic which is currently used in scaffolds and coatings for the regrowth of osseous tissue but offers poor load-bearing capacity compared to other biomaterials. The deformation mechanisms responsible for the mechanical behavior of HAP are not well understood, although the advent ...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2020.103894
更新日期：2020-10-01 00:00:00
abstract：OBJECTIVES:To investigate the elastic properties of human enamel using resonant ultrasound spectroscopy (RUS). METHODS:Six rectangular parallelepiped specimens were prepared from six human third molars. For all specimens, the theoretical resonant frequencies were calculated using the Rayleigh-Ritz method, knowing the ...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2018.09.014
更新日期：2019-01-01 00:00:00
abstract：:The inelastic deformability of the mineralised matrix in bones is critical to their high toughness, but the nanoscale mechanisms are incompletely understood. Antler is a tough bone type, with a nanostructure composed of mineralised collagen fibrils ∼100nm diameter. We track the fibrillar deformation of antler tissue d...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2013.03.020
更新日期：2013-12-01 00:00:00
abstract：:Orthopaedic surgery involves drilling of bones to get them fixed at their original position. The drilling process used in orthopaedic surgery is most likely to the mechanical drilling process and there is all likelihood that it may harm the already damaged bone, the surrounding bone tissue and nerves, and the peril is...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2016.05.015
更新日期：2016-09-01 00:00:00
abstract：:Despite the great potential of Mg and its alloys as material for biodegradable implants, their low resistance to the simultaneous action of corrosion and mechanical stresses in the human body have hampered their use. Stress Corrosion Cracking has been reported as one of the most critical failure modes to overcome to a...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2020.103724
更新日期：2020-06-01 00:00:00
abstract：:Age-related aortic stiffening is associated with cardiovascular diseases such as heart failure. The mechanical functions of the main structural components of the aorta, such as collagen and elastin, are determined in part by their organisation at the micrometer length scale. With age and disease both components underg...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2016.07.018
更新日期：2016-12-01 00:00:00
abstract：:Bone is a complex material showing a hierarchical and porous structure but also a natural ability to remodel thanks to cells sensitive to fluid flows. Based on these characteristics, a multiscale numerical model has been developed in order to represent the bone response under mechanical solicitation. It relies on the ...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2018.12.015
更新日期：2019-03-01 00:00:00
abstract：:The impact response of body armor composed of a ceramic plate with an ultrahigh molecular weight polyethylene (UHMWPE) fiber-reinforced composite and layers of UHMWPE fibers shielding a block of ballistic gelatin has been experimentally and numerically analyzed. It is a surrogate model for studying injuries to human t...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2015.01.010
更新日期：2015-05-01 00:00:00
abstract：:The aim of the present study was to investigate the production of tetragonal zirconia (t-ZrO(2)) particles (experimental t-ZrO(2)) from monoclinic zirconia (m-ZrO(2)) and to evaluate the effect of the t-ZrO(2) content on the fracture toughness of alumina-zirconia composites by conducting ASTM E399 standard test. In th...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2012.11.007
更新日期：2013-02-01 00:00:00
abstract：:The use of an adhesive for mesh fixation in hernia repair reduces chronic pain and minimizes tissue damage in the patient. This study was designed to assess the adhesive properties of a medium-chain (n-butyl) cyanoacrylate glue applied as drops or as a spray in a biomechanical and histologic study. Both forms of glue ...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2017.08.008
更新日期：2017-11-01 00:00:00
abstract：:This work is part of an ongoing program to develop a new carbon fiber/flax/epoxy (CF/flax/epoxy) hybrid composite material for use as an orthopaedic long bone fracture plate, instead of a metal plate. The purpose of this study was to evaluate the mechanical properties of this new novel composite material. The composit...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2012.12.013
更新日期：2013-04-01 00:00:00
abstract：:Nitinol self-expanding stents are effective in treating peripheral artery disease, including the superficial femoral, carotid, and renal arteries. However, fracture occurrences of up to 50% have been reported in some stents after one year. These stent fractures are likely due to in vivo cyclic displacements. As such, ...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2007.08.001
更新日期：2008-04-01 00:00:00
abstract：:In this study, the fabrication and properties of a synthetic keratoprosthesis skirt for use in osteo-odonto-keratoprosthesis (OOKP) surgery are discussed. In the search for a new material concept, bioactive glass and polymethyl methacrylate (PMMA)-based composites were prepared. Three different bioactive glasses (i.e....
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2011.05.025
更新日期：2011-11-01 00:00:00
abstract：:The scaled skin of fish is an intricate system that provides mechanical protection against hard and sharp puncture, while maintaining the high flexural compliance required for unhindered locomotion. This unusual combination of local hardness and global compliance makes fish skin an interesting model for bioinspired pr...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2017.06.014
更新日期：2017-12-01 00:00:00
abstract：:Cell mechanics plays an important role in regulating the physiological activities of cells. The advent of atomic force microscopy (AFM) provides a novel powerful instrument for quantifying the mechanics of single cells at the nanoscale. The applications of AFM in single-cell mechanical assays in the past decade have s...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2018.03.036
更新日期：2018-06-01 00:00:00
abstract：:Polylactic acid (PLA), one of the most likely green and environmentally friendly materials, is an alternative to petroleum-based plastic. It still remains a challenge to increase the degradation rate and decrease the cost of PLA without compromised mechanical properties. Low cost PLA/wood flour (WF) composite was elab...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2018.08.016
更新日期：2018-12-01 00:00:00
abstract：:The complex structure of healthy articular cartilage facilitates the joint withstanding the imposed pressures and retaining interstitial fluid to lessen stresses on its soft tissue, while easing the locomotion and minimising friction between cartilage mates. Avascular nature of this tissue results in unrecoverable dam...
journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
doi：10.1016/j.jmbbm.2021.104333
更新日期：2021-01-18 00:00:00
