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	1. The Ultimate load-carrying capacity of a thin-walled shuttle cylinder structure with cracks under eccentric compressive force
	CAO Caiqin,LIU Kan,DONG Junzhe
	Mechanics 13 July 2016
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	Abstract:The eccentric compression thin-walled shuttle cylinders structure is introduced, and elastic eigenvalue buckling of this kind of column with circumferential cracks is numerically simulated by the finite element method (FEM). Besides, based on the numerical results, ultimate load-carrying capacity analysis of eccentric compression thin-walled shuttle cylinders structure with cracks was studied in which geometric nonlinearity is included. The influences of some parameters, including the crack length, eccentricity, slenderness ratio and tapering ratio of thin-walled shuttle cylinders structure, have been taken into consideration. The results show that the ultimate load carrying capacity and the stability behavior can be improved by increasing the tapering ratio or decreasing slenderness ratio, eccentricity and crack length. And they also show that the eccentricity has a relationship with the influence of the crack length on stability behavior, that is, the ultimate load-carrying capacity is improved by decreasing the crack length only when the eccentricity is less than a certain value. Otherwise, when an eccentricity is larger than a certain value the crack length will have no effect on the ultimate load -carrying capacity of structure.
	TO cite this article:CAO Caiqin,LIU Kan,DONG Junzhe. The Ultimate load-carrying capacity of a thin-walled shuttle cylinder structure with cracks under eccentric compressive force[OL].[13 July 2016] http://en.paper.edu.cn/en_releasepaper/content/4699851


	2. Experimental Investigation of concrete under Moderate Dynamic Loading
	DONG Lixin,XU Shilang
	Mechanics 26 December 2013
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	Abstract:This paper presents the recent results of experimental investigations under dynamic loading aimed at disclosing the loading rate effect (mainly related to seismic loading range) on crack propagation in quasi-brittle fracture. Twenty four wedge-splitting tests were conducted using a servo-hydraulic machine under loading rates ranged from 0.001 mm/s to 10 mm/s. Strain gauges were mounted along the ligament of the specimen to measure the crack velocity and the crack propagation. Several important results were gained through the experimental investigations in this paper
	TO cite this article:DONG Lixin,XU Shilang. Experimental Investigation of concrete under Moderate Dynamic Loading[OL].[26 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4577394


	3. ON CONCEPT OF FRACTAL IN FRACTURE MECHANICS
	OU Zhuocheng,LI Guanying,DUAN Zhuoping,HUANG Fenglei
	Mechanics 02 August 2012
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	Abstract:Fractal, or generally a self-similar (or self-affine) structure of infinite order, has been extensively used as a nonlinear mathematical tool to describe various irregular and complex phenomena in fracture mechanics. However, there are still critical issues remaining ambiguous, leading to inherent difficulties mainly resulted from the contradiction between the integral dimension immeasurability of a fractal and the integral dimension characteristic of a physical object in nature. Here we demonstrate that conceptually a physical object in nature can never be described as a fractal, rather a ubiquitiform (a terminology coined here for a finite order self-similar or self-affine structure), and show mathematically that a ubiquitiform must be of integral dimension in Euclidean space, which is radically different from a fractal in the sense of the Hausdorff measure and makes the fractal approximation of a ubiquitiform unavailable. Our result implies that a natural object is of ubiquitiform rather than fractal, and thus, instead of the existing fractal theory, a new type of ubiquitiform theory must be established in future. We anticipate this result to be a starting point for the coming universal ubiquitiform theory in fracture mechanics. Moreover, it can be expected that the coming ubiquitiform theory will be more easy-to-use in practice than the fractal one, since it can be constructed completely on the base of "classical" mathematics, and hence some intrinsic difficulties in applied fractal science can be avoided.
	TO cite this article:OU Zhuocheng,LI Guanying,DUAN Zhuoping, et al. ON CONCEPT OF FRACTAL IN FRACTURE MECHANICS[OL].[ 2 August 2012] http://en.paper.edu.cn/en_releasepaper/content/4486167


	4. The Simulation of crack propagation with Discrete Element Method
	Xia Shengxu ,Yu Tiantang
	Mechanics 26 October 2009
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	Abstract:In this paper, the discrete element method (DEM) was used to study how cracks propagate in rocks subjected to a uniaxial compressive stress. In order to obtain immediate response to the loading, the convergence of DEM is firstly discussed with respect to the mass scaling method. Secondly, the bonded crack propagation criterion based on Mohr-Coulomb criterion is suggested. Thirdly, the DEM results were compared with those obtained in laboratory samples. The laboratory tests used rock samples with two cracks inclined at varying angles with respect to the compressive stress. The DEM and the laboratory results compared very well. Also, the results show that the DEM is a very successful approach for the visualization of secondary crack formations and its propagation in the simulated samples.
	TO cite this article:Xia Shengxu ,Yu Tiantang . The Simulation of crack propagation with Discrete Element Method[OL].[26 October 2009] http://en.paper.edu.cn/en_releasepaper/content/36127


	5. The anti-plane dynamic fracture analysis of functionally graded materials with arbitrary spatial variations of material properties
	Xiao-Xia Gao,Yue-Sheng Wang,Gan-Yun Huang
	Mechanics 14 December 2005
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	Abstract:Anti-plane dynamic fracture analysis is presented for functionally graded materials (FGM) with arbitrary spatial variations of material properties. The functionally graded material (FGM) with material properties varying continuously in an arbitrary manner is modeled as a multi-layered medium with the elastic modulus and mass density varying linearly in each sub-layer and continuous at the interfaces between sub-layers. With this linearly inhomogeneous multi-layered model, the problem of a crack in a graded interfacial zone bonded to two homogeneous half-spaces or in a coating bonded to a homogeneous half–space subjected to the anti-plane shear impact load is investigated. Laplace and Fourier transforms and transfer matrix are applied to reduce the mixed boundary value problem to a Cauchy singular integral equation which is solved numerically in the Laplace transformed domain. The dynamic stress intensity factors (DSIF) are obtained by using the numerical technique of Laplace inversion.
	TO cite this article:Xiao-Xia Gao,Yue-Sheng Wang,Gan-Yun Huang. The anti-plane dynamic fracture analysis of functionally graded materials with arbitrary spatial variations of material properties[OL].[14 December 2005] http://en.paper.edu.cn/en_releasepaper/content/4372

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