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| 1 | INFLUENCE OF MAGNETIZATION ROTATION ON MARTENSITE REORIENTATION IN MAGNETIC SHAPE MEMORY ALLOY显示文摘A large field-induced strain of magnetic shape memory alloy is developed by the martensite variant reorientation.It is widely recognized that the martensite reorientation in a magnetic shape memory alloy(MSMA) can develop if the magnetic field is large enough.However,it has been shown in the literature that the magnetization rotation may block variant reorientation via energy minimization approach.In this paper,based on a micromechanical model associated with the thermodynamic theory,authors show that there are some limits for the martensite reorientation,which is hindered by the magnetization rotation.Some useful conclusions are obtained. | Yuping Zhu Guansuo Dui | 2010 | Acta Mechanica Solida Sinica2010，23，1： | 4 |
| 2 | A new interpretation of internal-variable theory in finite thermo-viscoelasticity显示文摘Based on the non-equilibrium thermodynamics,an internal-variable theory in thermo-viscoelasticity at finite deformation was proposed by Huang in 1999.In this theory,a modified stretch of the molecular chain was introduced,and hence the molecular network model in rubber elasticity was extended to take into account the viscous and thermal effects of the material.The viscous dissipation of the material can then be described by means of these internal variables,which appear in the expression of the modified stretch.In order to give a clearer explanation on the physical implication of the internal variables,a connection between the internal-variable theory and theoretical formulation based on the multiplicative decomposition of the deformation gradient in existing literature is presented in this paper,which allows the above internal-variable theory to be more systematic. | HUANG ZhuPing DUI GuanSuo YANG ShengYou | 2013 | Science China Chemistry2013，56，3： | 3 |
| 3 | A continuum model of jointed rock masses based on micromechanics and its integration algorithm显示文摘The paper is devoted to proposing a constitutive model based on micromechanics. The joints in rock masses are treated as penny-shaped inclusion in solid but not through structural planes by considering joint density, closure effect, joint geometry. The mechanical behavior of the joints is represented by an elasto-plastic constitutive law. Mori-Tanaka method is used to derive the relationship between the joint deformations and macroscopic strains. The incremental stress-strain relationship of rock masses is formulated by taking the volume average of the representative volume element. Meanwhile, the behavior of joints is obtained. By using implicit integration algorithms, the consistent tangent moduli are proposed and the method of updating stresses and joint displacements is presented. Some examples are calculated by ABAQUS user defined material subroutine based on this model. | ZHU FuWei DUI GuanSuo REN QingWen | 2011 | Science China(Technological Sciences)2011，54，3： | 2 |
| 4 | A MODEL CONSIDERING HYDROSTATIC STRESS OF POROUS NITI SHAPE MEMORY ALLOY显示文摘Based on the micromechanical method and thermodynamic theory,a constitutive model for the macroscopic mechanical behavior of porous NiTi shape memory alloy is presented.The hydrostatic stress is considered for porous NiTi according to the transformation function of dense NiTi.The present model takes account of the tensile-compressive asymmetry of NiTi,and can degenerate to model dense material.Numerical calculations,which only need material parameters of dense NiTi,are conducted to investigate the nonlinear and hysteretic strain of porous NiTi,and the predicted results are in good agreement with the corresponding experiments. | Yuping Zhu Guansuo Dui | 2011 | Acta Mechanica Solida Sinica2011，24，4： | 2 |
| 5 | Derivatives on the isotropic tensor functions显示文摘The derivative of the isotropic tensor function plays an important part in continuum mechanics and computational mechanics, and also it is still an opening problem. By means of a scalar response function f ( Λ i , I 1 , I2) and solving a tensor equation, this problem is well studied. A compact explicit expression for the derivative of the isotropic tensor function is presented, which is valid for both distinct and repeated eigenvalue cases. Throughout the analysis, the formulation holds for general isotropic tensor functions without need to solve eigenvector problems or determine coefficients. On the theoretical side, a very simple solution of a tensor equation is obtained. As an application to continuum mechanics, a base-free expression for the Hill’s strain rate is given, which is more compact than the existent results. Finally, with an example we compute the derivative of an exponent tensor function. And the efficiency of the present formulations is demonstrated. | DUI Guansuo WANG Zhengdao JIN Ming | 2006 | Science China(Physics,Mechanics & Astronomy)2006，49，3： | 2 |
| 6 | Revisiting the elastic solution for an inner-pressured functionally graded thick-walled tube within a uniform magnetic field显示文摘In this paper, the mechanical responses of a thick-walled functionally graded hollow cylinder subject to a uniform magnetic field and inner-pressurized loads are studied. Rather than directly assume the material constants as some specific function forms displayed in pre-studies, we firstly give the volume fractions of different constituents of the functionally graded material(FGM) cylinder and then determine the expressions of the material constants. With the use of the Voigt method, the corresponding analytical solutions of displacements in the radial direction, the strain and stress components, and the perturbation magnetic field vector are derived. In the numerical part, the effects of the volume fraction on the displacement, strain and stress components, and the magnetic perturbation field vector are investigated. Moreover, by some appropriate choices of the material constants, we find that the obtained results in this paper can reduce to some special cases given in the previous studies. | Libiao XIN Yanbin LI Dongmei PAN Guansuo DUI Chengjian JU | 2018 | Applied Mathematics and Mechanics(English Edition)2018，39，10： | 1 |
| 7 | A note on the derivation of the derivatives of invariants of stretch tensor to the right Cauchy-Green tensor显示文摘为关于正确 Cauchy 的段张肌的主要 i8nvariants 的推导的一条新途径 - 格林张肌在这篇论文被介绍。根据张肌功能的推导的定义,为段张肌的主要 invariants 的三一阶的衍生物被增长方法直接通过推导获得到正确 Cauchy 格林张肌。然后,三秒顺序衍生物被推导直接产出到正确 Cauchy 格林种类张肌。而且,一般 Varga 材料的正切模量的明确的表情作为一个例子被给。 | TIAN Dongyan JIN Ming DUI Guansuo | 2006 | Progress in Natural Science:Materials International2006，16，1： | 1 |
| 8 | 显示文摘 | Zhu Yuping Dui Guansuo | 2006 | Key Engineering materials2006，，： | 1 |
| 9 | A Simple Cement Hydration Model Considering the Influences ofWater-to-Cement Ratio and Mineral Composition显示文摘A simple hydration model is used here by taking the composition of the cement and the initial water: cementratio (w/c) into account explicitly. Its conceptual basis is a combination of the Avrami equation and Bentz’s modelbased on simple spatial considerations. In this model, the Avrami equation determines the initial reaction, andBentz’s model describes the following hydration stage. The model favors engineers for it relies on one experimentalparameter and has a reliable approximation in the practice. | Baoyu Ma Guansuo Dui Zhenglin Jia Bo Yang Chunyan Yang Quangui Gao Longhua Qin Ju Ma | 2021 | Computer Modeling in Engineering & Sciences2021，，6： | 1 |
| 10 | CONSTITUTIVE MODELING OF ROLLED SHAPE MEMORY ALLOY SHEETS TAKING INTO ACCOUNT PRE-TEXTURE AND ANISOTROPIC HARDENING显示文摘The drawing or rolling process endows polycrystal shape memory alloy with a crystallographic texture, which can result in macroscopic anisotropy. The main purpose of this work is to develop a constitutive model to predict the thermomechanical behavior of shape memory alloy sheets, which accounts for the crystallographic texture. The total macroscopic strain is decomposed into elastic strain and macro-transformation strain under isothermal condition. Considering the transformation strain in local grains and the orientation distribution function of crystallographic texture, the macro-transformation strain and the effective elastic modulus of textured polycrystal shape memory alloy are developed by using tensor expressions. The kinetic equation is established to calculate the volume fraction of the martensite transformation under given stress. Furthermore, the Hill's quadratic model is developed for anisotropic transformation hardening of textured SMA sheets. All the calculation results are in good agreement with experimental data, which show that the present model can accurately describe the macro-anisotropic behaviors of textured shape memory alloy sheets. | Yuping Zhu Yuanbing Wang Guansuo Dui | 2014 | Acta Mechanica Solida Sinica2014，27，2： | 1 |
| 11 | Analytical solutions for deep tunnels in strain-softening rocks modeled by different elastic strain definitions with the unified strength theory显示文摘This paper presents the analytical solutions for the responses of tunnels excavated in rock masses exhibiting strain-softening behavior. Since previous analyses give little consideration to the effect of the intermediate principal stress on the strain-softening rock behavior, the unified strength theory was introduced to analyze the tunnel response. Four cases of different definitions of the elastic strain in the softening and residual regions, used in the existing solutions, were considered. The tunnel displacements,stresses, radii of the softening and residual zones and critical stresses were deduced. The proposed solutions were verified by comparing with numerical simulations, model tests and existing solutions. Furthermore, the solutions of the four cases were compared with each other to investigate the influence of the elastic strain expressions on the tunnel responses. The results showed that the intermediate principal stress coefficient b has a significant effect on the tunnel displacements, stress fields, and plastic radii. Parametric studies were performed to analyze the influences of the softening and residual dilatancy coefficients,softening modulus and residual strength on the tunnel responses. The parametric analysis indicated that the existing models should be carefully evaluated in the analysis of tunnels constructed through average-quality rocks;the proposed solutions outperformed the existing models in solving the mentioned problem. | SUN ZhenYu ZHANG DingLi FANG Qian DUI GuanSuo CHU ZhaoFei | 2022 | Science China(Technological Sciences)2022，65，10： | 1 |
| 12 | Modeling of Superelastic–plastic Behavior of Porous Shape Memory Alloys Incorporating Void Shape Effects显示文摘A new constitutive model for describing the superelastic–plastic behavior of porous shape memory alloys(SMAs)is proposed.The model incorporates the influences of void shape and hydrostatic pressure as well as the elastic modulus mismatch between austenite and martensite.In addition,the interactions between plastic strain and transformation strain are considered via the plastic back stress.The porous SMAs are considered as two-phase composites with the dense SMA matrix and the second phase representing ellipsoidal voids.Based on Gurson’s formulation,the transformation and plastic flow potentials accounting for the transformation–plasticity coupling are developed.The numerical results present good agreement with available experimental data for various levels of porosity,which proves that the model is capable of capturing stress-induced phase transformation and plastic deformation of porous SMAs.Using the proposed model,the influence of plastic strain on reverse transformation and the effects of porosity and void shape on the pseudoelastic and plastic behavior of porous SMAs are investigated. | Xiang Zhu Guansuo Dui | 2021 | Acta Mechanica Solida Sinica2021，34，5： | 0 |
| 13 | Correction to: Modeling of Superelastic–plastic Behavior of Porous Shape Memory Alloys Incorporating Void Shape Effects显示文摘During production of the article unfortunately a typesetting mistake has been introduced in Eq.(3).The correct equation is. | Xiang Zhu Guansuo Dui | 2021 | Acta Mechanica Solida Sinica2021，34，5： | 0 |
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