Experimental and numerical analysis of plates quasi-statically loaded by a rectangular indenter

Shi, Shiyun; Zhu, Ling; Karagiozova, D.; Gao, Junying

doi:10.1016/j.marstruc.2017.04.007

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…Any difference between those samples will influence the results. In fact, a QC method where the conditions can be precisely and singly controlled is conductive to such an aim, and this has already been verified as undeniable, valid and reliable for decades through theoretical analysis and experiments [ 26 , 27 , 28 , 29 ].…”

Section: Methodsmentioning

confidence: 99%

Synergy Effect and Symmetry-Induced Enhancement Effect of Surface Multi-Defects on Nanohardness by Quasi-Continuum Method

Zhang

Wang

2022

Materials

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The quasicontinuum method has been applied to probe the thin film with surface multi-defects, which is commonly seen in nanoimprint technique and bulk micromachining. Three unilaterally distributed multi-defect models and six bilaterally distributed multi-defect models of Pt thin film have been carried out in nanoindentation. The results show that the nanohardness gradually decreases as the number of unilaterally distributed multi-defects increases, along with the increasingly low decline rate of the nanohardness. The synergy effect of the unilaterally distributed multi-defects has been highly evidenced by the critical load revision for dislocation emission of Pt thin film, and it is predicted into a universal form with the synergy coefficient among the existing multi-defects for FCC metals. Moreover, the nanohardness obviously increases when the bilaterally distributed multi-defects form into symmetrical couple, and it could be even greater than the one with defect-free surface, due to the symmetry-induced enhancement effect on nanohardness. The symmetry-induced enhancement coefficient has been brought out and has well explained the symmetry-induced enhancement effect of bilaterally distributed multi-defects on the nanohardness by a prediction formula. Furthermore, the characteristic length of symmetric relations has been brought out to calculate the symmetry-induced enhancement coefficient and it has been effectively predicted to equal to the sum of the adjacent distance between the surface defect and the indenter, the defect depth near the indenter, and the defect width for FCC metal.

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Section: Methodsmentioning

confidence: 99%

Synergy Effect and Symmetry-Induced Enhancement Effect of Surface Multi-Defects on Nanohardness by Quasi-Continuum Method

Zhang

Wang

2022

Materials

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“…Bing-Feng Ju et al conducted an experimental study of the elastic deformation as indented by a fine cylindrical, flat-ended punch in the presence of long-range intersurface forces [ 35 ]. Shiyun Shi et al performed a series of experiments in order to examine the response of clamped steel plates loaded quasi-statically at their center by a rigid rectangular indenter, where the deformation modes of the tested plates are summarized based on the experimental observations and numerical simulations [ 36 ]. Based on the above discussion, the rectangular-shaped indenters do have particular significance in punch indentation.…”

Section: Methodsmentioning

confidence: 99%

Shape Effect of Surface Defects on Nanohardness by Quasicontinuum Method

Zhang

Wang

et al. 2020

Micromachines

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Nanoindentation on a platinum thin film with surface defects in a rectangular shape and triangular shape was simulated using the quasicontinuum method to study the shape effect of surface defects on nanohardness. The results show that the nanohardness of thin film with triangular defects is basically larger than those with rectangular defects, which is closely related to the height of the surface defects at the boundary near to the indenter. Moreover, the triangular defect might have an enhancement effect on nanohardness by a certain size of the defects and the boundary orientation of the defect, where such an enhancement effect increases as the defect grows. Furthermore, the nanohardness decreases when the defect is folded from wide to narrow in the same atom cavity, and particularly expresses a more obvious drop when the height of the defects increases. In addition, larger sizes of the rectangular defect induce more reduction in nanohardness, while the nanohardness of the triangular surface defect is sensitive to the periodic arrangement of atoms changed by the boundary orientation of the defect, which is well explained and demonstrated by the calculation formula theory of necessary load for dislocation emission.

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Design Principle of Wheel Patch Loaded Ship Plating

Zhu

Cai

et al. 2020

Lecture Notes in Civil Engineering

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Experimental and numerical analysis of plates quasi-statically loaded by a rectangular indenter

Cited by 5 publications

References 10 publications

Synergy Effect and Symmetry-Induced Enhancement Effect of Surface Multi-Defects on Nanohardness by Quasi-Continuum Method

Synergy Effect and Symmetry-Induced Enhancement Effect of Surface Multi-Defects on Nanohardness by Quasi-Continuum Method

Shape Effect of Surface Defects on Nanohardness by Quasicontinuum Method

Design Principle of Wheel Patch Loaded Ship Plating

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