An anisotropic distribution dislocation loop model for simulation of nanoindentation of single crystals

Chen, Y.P.; Guo, Jipeng; Cai, Ying

doi:10.1016/j.mechmat.2017.02.004

Cited by 9 publications

(3 citation statements)

References 25 publications

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“…The displacement increased rapidly at the beginning of loading and then slowed down gradually. This creep behavior consists of instantaneous elastic deformation, viscoelastic deformation and viscoelastic degeneration [19,20]. The maximum creep displacement of H0 occurs at 20 • C. For the H0 nanoindentation test at 180 • C, the creep displacement increased significantly, and the curve fluctuated noticeably; this is mainly caused by the degradation of hemicellulose and the softening of lignin [16].…”

Section: Temperature On Creep Behaviorsmentioning

confidence: 99%

“…Nanoindentation is also applicable to the study of plastic deformation and dislocations of materials [16][17][18]. The creep of materials such as polymers and soft metals has been studied using data collected during the pressing process [19,20]. Nanoindentation is also applied to characterize the viscoelastic properties of biological tissue structure by extending the load-holding time [21].…”

Section: Introductionmentioning

confidence: 99%

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Temperature-Dependent Creep Behavior and Quasi-Static Mechanical Properties of Heat-Treated Wood

Dong¹,

Wang

2021

Forests

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In this paper, Berkovich depth-sensing indentation has been used to study the effects of the temperature-dependent quasi-static mechanical properties and creep deformation of heat-treated wood at temperatures from 20 °C to 180 °C. The characteristics of the load–depth curve, creep strain rate, creep compliance, and creep stress exponent of heat-treated wood are evaluated. The results showed that high temperature heat treatment improved the hardness of wood cell walls and reduced the creep rate of wood cell walls. This is mainly due to the improvement of the crystallinity of the cellulose, and the recondensation and crosslinking reaction of the lignocellulose structure. The Burgers model is well fitted to study the creep behavior of heat-treated wood cell walls under different temperatures.

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Section: Temperature On Creep Behaviorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Creep Behavior and Quasi-Static Mechanical Properties of Heat-Treated Wood

Dong¹,

Wang

2021

Forests

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“…With anisotropic materials (such as fiber-reinforced, rock and rock mass materials, carbon/carbon composites, engineer steels etc) widely applied in engineering, it is necessary to extend indentation measurement to anisotropic fields [26][27][28][29][30][31][32]. Currently, on the one hand, the indentation theory of isotropic materials has extended to anisotropic materials, and some theoretical studies have been conducted [33][34][35][36][37][38][39]. For example, by theoretical analysis, the indentation contact problem with arbitrary shape indenter on anisotropic elastic solids has been solved by Vlassak et al, and an approximate solution to the conical indentation in the elastic anisotropic half space was obtained [35].…”

Section: Introductionmentioning

confidence: 99%

Measuring elastic parameters of transversely isotropic materials by cylindrical indentation

Liao

Xie

2023

Meas. Sci. Technol.

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Based on the cylindrical indention experiments, a novel model has been established to characterize the elastic mechanical property of transversely isotropic materials. In the first place, the influences of different loading orientations for indentation, and elastic parameters of materials on the indentation modulus of transversely isotropic materials are analyzed by means of theoretical and dimensional analysis. In the second place, three dimensional (3D) indentation experiments that encompass the wide range of transversely isotropic material parameters are simulated by finite element (FE) approach. Each quantity (transversely isotropic Young’s modulus, EP, longitudinal Young’s modulus, EL, longitudinal shear modulus, GL, and loading orientation angle, ) how affects the normalized indentation modulus is investigated. Then, the dimensionless analytical relationship between indentation modulus and elastic parameters is put up at three different indentation orientation angles . To prove the correctness of the proposed model, several groups of transversely isotropic materials are selected as input parameters to carry out indentation numerical experiments and the error analysis is made in detail. Simultaneously, the technique is specialized to the particular case of a Zinc single crystal material to verify the accuracy of these formulas derived. These good agreements show that the proposed method is reliable and it could be used to quantify the elastic parameters of the transversely isotropic materials.

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Determination of mechanical behaviors of Ho3+:BaY2F8 single crystals by nanoindentation

Zhang

Song

Zhang

et al. 2019

Ceramics International

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An anisotropic distribution dislocation loop model for simulation of nanoindentation of single crystals

Cited by 9 publications

References 25 publications

Temperature-Dependent Creep Behavior and Quasi-Static Mechanical Properties of Heat-Treated Wood

Temperature-Dependent Creep Behavior and Quasi-Static Mechanical Properties of Heat-Treated Wood

Measuring elastic parameters of transversely isotropic materials by cylindrical indentation

Determination of mechanical behaviors of Ho3+:BaY2F8 single crystals by nanoindentation

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