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Cseh, G.; Chinh, Nguyen Q.; Tasnádi, P.; Szommer, Péter; Juhász, András

doi:10.1023/a:1018524016505

Cited by 23 publications

(2 citation statements)

References 13 publications

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“…22 For creep-dominant materials, a nanoindenter can be used to quantitatively measure the creep parameters. When traditional creep parameters are calculated based on creep experiments of the uniaxial tensile stress state, the steady-state indentation strain rate is often described as the following [23][24][25][26][27][28] :…”

Section: Nanoindentationmentioning

confidence: 99%

Nanoindentation investigation of the stress exponent for the creep of dung beetle (Copris ochusMotschulsky) cuticle

Zhang

Sun

et al. 2016

Bioengineered

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ABSTACTWith the rapid development of bionic science, especially the progress that has been made in the fields of biomaterials and biomimetics, there is now great interest in the surface and internal mechanical properties of biological materials at the micro-and nanoscale. The study of micro-and nanoscale biomaterial mechanical properties could enable interdisciplinary applications in materials science, biological science and bionic science. Dung beetle (Copris ochus Motschulsky) cuticle is a viscoelastic material that is both viscous and flexible via elastic deformation under external forces; where stress s, strain e and elastic modulus E are related in the following way: s D Ee. In addition, as s is related to the rate of strain, time is also a factor. The stress-strain relationships of various parts of dung beetle cuticle were investigated in this paper. As time increased, the stress and strain of the material were found to decrease and increase, respectively, indicating that when the material was indented for a certain period, the interaction force between the indenter and the material gradually achieved a state of dynamic equilibrium. However, strain continued to occur until reaching a point of equilibrium because of the creep phenomenon. The stress-strain curves showed a strong character in each holding time condition: the longer the holding time, the more flattened the stress-strain curve. These findings will be useful in the advanced design of strong, lightweight, and biomimetic composites.

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Section: Nanoindentationmentioning

confidence: 99%

Nanoindentation investigation of the stress exponent for the creep of dung beetle (Copris ochusMotschulsky) cuticle

Zhang

Sun

et al. 2016

Bioengineered

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“…Although the phenomenological interpretation of these tests is relatively simple, the preparation of relevant samples is difficult and expensive, especially in the case of advanced structural ceramics. The indentation methods have also been applied successfully for the investigation of the creep process and for the determination of the creep parameters and for viscosity measurements on glasses [1][2][3]. Indentation creep tests are technically simpler than the four-point bending or tensile test, but the correct physical interpretation of the deformation process taking place during impression tests is very intricate, because the stress field under the indenter is multiaxial and inhomogeneous.…”

Section: Introductionmentioning

confidence: 99%

Impression Creep in TBC and Advanced Ceramics Materials

Dorčáková

Janík

Hegedűsová

et al. 2007

KEM

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The indentation creep of free-standing Y-ZrO2 layer and 20Sc-60Si-20Mg-80O-20N oxynitride glass has been investigated. Creep experiment has been performed with flat cylindrical indenter (hot pressed SiC) in the temperature range from 860 °C to 1300 °C at the loads from 20 to 100 MPa. The strain-time relationship was registered and the creep exponent and activation energy of creep have been calculated. The microstructure changes have been observed and documented. Viscosity as a function of temperature and the glass transition temperature (Tg) were determined in oxynitride glass and compared with values from compressive creep.

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Low temperature super ductility and threshold stress of an ultrafine-grained Al–Zn–Mg–Zr alloy processed by equal-channel angular pressing

et al. 2021

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Low temperature tensile and impression creep tests were carried out on an ultrafine-grained 7xxx series Al–4.8Zn–1.2 Mg–0.14Zr (wt%) alloy, which can be deformed for maximum elongation of about 200% at 150 °C. The characteristics of the deformation process, such as the strain rate sensitivity (SRS) and activation energy (Q) were determined by considering also the effect of threshold stress. Relatively high SRS of $$\sim$$ ∼ 0.35 and low activation energy of $$\sim$$ ∼ 92 kJ/mole were obtained, confirming the super ductility of the investigated ultrafine-grained alloy in the low temperature region between 140 and 160 °C. Graphical abstract

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Cited by 23 publications

References 13 publications

Nanoindentation investigation of the stress exponent for the creep of dung beetle (Copris ochusMotschulsky) cuticle

Nanoindentation investigation of the stress exponent for the creep of dung beetle (Copris ochusMotschulsky) cuticle

Impression Creep in TBC and Advanced Ceramics Materials

Low temperature super ductility and threshold stress of an ultrafine-grained Al–Zn–Mg–Zr alloy processed by equal-channel angular pressing

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