欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
运用弹性力学的复势方法，研究了纵向剪切下增强相／夹杂内螺型位错偶极子与含共焦钝裂纹椭圆夹杂的干涉效应，得到了该问题复势函数的封闭形式解答，由此推导出了夹杂区域的应力场、作用在螺型位错偶极子中心的像力和像力偶矩以及裂纹尖端应力强度因子的级数形式解．并分析了位错偶极子倾角φ、钝裂纹尺寸和材料常数对位错像力、像力偶矩以及应力强度因子的影响．数值计算结果表明：位错像力、像力偶矩以及应力强度因子均随位错偶极子倾角做周期变化；夹杂内部的椭圆钝裂纹明显增强了硬基体对位错的排斥，减弱了软基体对位错的吸引，且对于硬夹杂，位错出现了一个不稳定平衡位置，该平衡位置随钝裂纹曲率的增大不断向界面靠近；变化φ值将出现改变位错偶极子对应力强度因子作用方向的临界值．
英文摘要：
By using the complex variable method of elasticity,interaction between a screw dipole inside inhomogeneity/reinforced phase and a confocal blunt crack in elastic elliptical inhomogeneity is investigated and a closed solution is obtained. The stress field of inhomogeneity,the image force and image torque acting on the center of screw dipole and the stress .intensity factor of the blunt crack tip are obtained in the series form. The influences of the dip angle of screw dipole φ,the size of blunt crack and the material parameters on them are analyzed. The numerical results show that the image force, image torque and stress intensity changes periodically with the dip angle of screw dipole; the blunt crack in inhomogeneity can significantly strengthen the repulsion of hard matrix to dislocation and weaken the attraction of soft matrix to dislocation;there is an unstable equilibrium position for screw dipole when the inhomogeneity is hard, and the equilibrium position approaches to the interface with the curvature of blunt crack increasing; the variation of φ tends to a critical value which can change the action direction of stress intensity factor.
同期刊论文项目
同项目期刊论文
The Interaction between a Piezoelectric Screw Dislocation Dipole and an EllipticBlunt Crack in Ellip
Investigation into diffusion induced plastic deformation behavior in hollow lithium ion battery elec
Interface effects on elastic behavior of a screw dislocation around double nanowires (vol 442, pg 6,
Analytical Model for Sandwich-Lithiation in Hollow Amorphous Silicon Nano-Anodes Coated on Carbon Na
The interaction between a screw dislocation and a nano-inhomogeneity with a semi-infinite wedge crac
Elastic interaction between edge dislocation, concentrated force, point heat source and edge crack i
Emission criterion of a screw dislocation near a semi-infinite wedge crack partially penetrating a n
Effect of special rotational deformation on dislocation emission from a semielliptical blunt crack t
Exact solutions for piezoelectric screw dislocations near two asymmetrical edge cracks emanating fro
A phase field study focuses on the transverse propagation of deformation twinning for hexagonal-clos
Subsurface damage mechanism of high speed grinding process in single crystal silicon revealed by ato
Special rotational deformation and grain size effect on fracture toughness of nanocrystalline materi
Screw dislocations interacting with two asymmetrical interfacial cracks emanating from an elliptical
Nanoscale rotational deformation effect on dislocation emission from an elliptically blunted crack t
Interaction between dislocation and subsurface crack under condition of slip caused by half-plane co
Screw dislocation and elliptic inhomogeneity of a confocal crack in magnetoelectroelastic medium: Co
Misfit dislocations in an annular film grown on a cylindrical nanowire with different elastic consta
Energy density and release rate study of an elliptic-arc interface crack in piezoelectric solid unde
Image force and stability of a screw dislocation inside a coated cylindrical inhomogeneity with inte
Dipole of edge misfit dislocations and critical radius condition for buried strained cylindrical inh
Elastic behaviour of a wedge disclination dipole near a sharp crack emanating from a semi-elliptical
Shielding effect and emission condition of a screw dislocation near a blunt crack in elliptical inho
Electroelastic interaction between a piezoelectric screw dislocation and a confocal elliptic blunt c
Effect of interaction of dislocations with core-shell nanowires on critical shear stress of nanocomp
Effect of interface stresses on the image force and stability of an edge dislocation inside a nanosc
Special rotational deformation effect on the emission of dislocations from a crack tip in deformed n
A piezoelectric screw dislocation in a three-phase composite cylinder model with an imperfect interf
Elastic behaviour of an edge dislocation near a sharp crack emanating from a semi-elliptical blunt c
The interaction between a screw dislocation and a rigid line in a confocal elliptical inhomogeneity.
A Piezoelectric Screw Dislocation Interacting with an Elliptical Piezoelectric Inhomogeneity Contain
Shielding Effect and Emission Criterion of a Screw Dislocation Near an Interfacial Crisscross Crack.
期刊信息
位置：