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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. Numerical Simulation of CL-20 Underwater Explosion Performance of Shock Waves and Pulsating Bubble Phenomena
	FENG Song,PENG Jinhua,RAO Guoning
	Mechanics 08 December 2015
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	Abstract:This paper describes numerical methodology to model and investigates the shock waves and bubble dynamics produced by an underwater explosion when it happens in limited waters. The nonlinear dynamics results were calculated by ANSYS-AUTODYN explicit software. CL-20 was studied as basic research object in underwater test. The results calculated by empirical formula and AUTODYN was compared in order to corroborate the accuracy of numerical results. It was shown that pressure and impulse histories for simulation are in good correspondence with the data calculated by empirical formula, which confirms that the method of numerical simulation is reliable.
	TO cite this article:FENG Song,PENG Jinhua,RAO Guoning. Numerical Simulation of CL-20 Underwater Explosion Performance of Shock Waves and Pulsating Bubble Phenomena[OL].[ 8 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4667297


	3. Point-by-Point Scanning Piezoelectric Phased Array for detecting damage for SHM
	Li Xingang ,Wang Zhenqing ,Huang Zhanwen
	Mechanics 24 February 2009
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	Abstract:The aim of the present work is to develop a system of smart devices that could be permanently attached on the surface of the structure for monitoring cracks in most aerospace structures in isolated environments. It is shown that temporal and spatial focusing can be achieved through synthetic time-reversal array method for a linear phase array of sensors and actuators. A Piezoelectric phased array system performs a point-by-point scan in which focusing allow the inspection of large areas. Damage to the structure can be inferred if there is a significant change in the transient response of the structure using the analysis of the amplitude of the received signal. The location of this damaged area can be determined using the analysis of the time it reaches the transducer. By the method of synthesis of received signal time delay from multiple sensors, we can considerably enhance the signal strength, thus reducing the negative effects of noises to solve the tough problem of processing the echo signal. The results suggest an accuracy better than 1 mm in finding the location of crack tips.
	TO cite this article:Li Xingang ,Wang Zhenqing ,Huang Zhanwen . Point-by-Point Scanning Piezoelectric Phased Array for detecting damage for SHM [OL].[24 February 2009] http://en.paper.edu.cn/en_releasepaper/content/29526


	4. Relationship between the homotopy analysis method and harmonic balance method
	Y.M. Chen,J.K. Liu
	Mechanics 09 February 2009
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	Abstract:The relationship between the homotopy analysis method (HAM) and harmonic balance (HB) method is studied. The HAM is employed to obtain the periodic solutions of conservative and self-excited systems, respectively. Different from the usual procedures in the existing literature, the HAM is modified by retaining only several lower harmonics. It is proved that as long as the solution obtained by the modified approach is convergent, it must converge to one HB solution. The Duffing equation, the van der Pol equation and the flutter equation of a two-dimensional airfoil are taken as three illustrative examples to validate the proposed theory.
	TO cite this article:Y.M. Chen,J.K. Liu. Relationship between the homotopy analysis method and harmonic balance method[OL].[ 9 February 2009] http://en.paper.edu.cn/en_releasepaper/content/28594


	5. Debond propagation in sandwich structure under uniaxial in-plane compression
	Chen Jinlong,Gong Wenran,Qin Yuwen
	Mechanics 16 January 2009
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	Abstract:Sandwich structures are made of thin and stiff face sheets and weaker core. The upper and lower face sheets are bonded to the core by glue. In practice, there are always face/core debonds exists in sandwich structure, these debonds are usually induced during manufacturing or by hard object impact during service. The purpose of this paper is to predict the mechanical behavior and the propagation of the debond of a compression loaded panel containing a face/core debond. During the research, we used the FEA software to simulate the mechanical behavior and the propagation of the debond of the compression loaded panel. This research concentrates on the simulation of panel with circular debond, we simulate the glue with three sets of spring elements. Compared with the experimental results and those computed by energy release rate, we proved the reasonability of the results. We also discussed the choosing of debond propagation criterion and found that the criterion we used in this paper operates easily and has higher precision.
	TO cite this article:Chen Jinlong,Gong Wenran,Qin Yuwen. Debond propagation in sandwich structure under uniaxial in-plane compression[OL].[16 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27997


	6. Determining Stress and Effective Elastic Parameters for Spherical Contact Problems II: Dynamic Contact
	Xiao Jianhua
	Mechanics 19 March 2008
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	Abstract:The time dependent dynamic solutions are obtained in analytical form. The solution shows that: (1) for elastic contact, the time rate of stress increasing is determined by the contact geometry and medium feature (no dependence on load force); (2) for plastic contact, the time rate of stress increasing is determined by the medium feature (no dependence on load force and contact geometry); (3) for cracking contact, reducing the radium of sphere will increase the cracking range size and the cracking tip transportation speed; (4) for a given sphere size, increase the load will increase the cracking range and increase the cracking tip transportation speed. The solution in this paper forms the basic solution for the dynamic contact problem.
	TO cite this article:Xiao Jianhua. Determining Stress and Effective Elastic Parameters for Spherical Contact Problems II: Dynamic Contact[OL].[19 March 2008] http://en.paper.edu.cn/en_releasepaper/content/19443

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