The Analysis of Shallow Shells Based on Multivariable Wavelet Finite Element MethodActa Mechanica Solida Sinica - Tập 24 - Trang 450-460 - 2011
Xingwu Zhang, Xuefeng Chen, Zhengjia He, Zhibo Yang
Based on the generalized variational principle and B-spline wavelet on the interval (BSWI), the multivariable BSWI elements with two kinds of variables (TBSWI) for hyperboloidal shell and open cylindrical shell are constructed in this paper. Different from the traditional method, the present one treats the generalized displacement and stress as independent variables. So differentiation and integra...... hiện toàn bộ
Analysis of meso-inhomogeneous deformation on a metal material surface under low-cycle fatigueActa Mechanica Solida Sinica - Tập 30 - Trang 557-572 - 2017
Gui-Long Liu, Ke-Shi Zhang, Xian-Ci Zhong, Jiann Woody Ju
A polycrystalline Voronoi aggregation with a free surface is applied as the representative volume element (RVE) of the nickel-based GH4169 superalloy. Considering the plastic deformation mechanism at the grain level and the Bauschinger effect, a crystal plasticity model reflecting the nonlinear kinematic hardening of crystal slipping system is applied. The microscopic inhomogeneous deformation dur...... hiện toàn bộ
Optimal track seeking control of dual-stage actuator for high density hard disk drivesActa Mechanica Solida Sinica - Tập 19 - Trang 297-306 - 2006
Haomiao Zhou, Jie Wang, Youhe Zhou, Xiaojing Zheng
Based on generalized the variation method, by introducing Hamilton function and Lagrange multiplier, this paper proposed a linear quadratic optimal control strategy for an incomplete controllable system with fixed terminal state and time. Applying the proposed optimal control to the simple two-input dual-stage actuator magnetic head positioning system with three degrees-of-freedom, the simulation ...... hiện toàn bộ
Improved Normalization Method for Ductile Fracture Toughness Determination Based on Dimensionless Load Separation PrincipleActa Mechanica Solida Sinica - Tập 28 - Trang 168-181 - 2015
Chen Bao, Lixun Cai, Kaikai Shi, Chen Dan, Yao Yao
This study successfully deals with the inhomogeneous dimension problem of load separation assumption, which is the theoretical basis of the normalization method. According to the dimensionless load separation principle, the normalization method has been improved by introducing a forcible blunting correction. With the improved normalization method, the J-resistance curves of five different metallic...... hiện toàn bộ