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：
研究了穿透圆形夹杂界面的半无限楔形裂纹与裂纹尖端螺型位错的干涉问题.应用复变函数解析延拓技术与奇性主部分析方法,得到了位错位于半圆形夹杂内部时,半无限基体和半圆形夹杂内复势函数的解析解.然后利用保角映射技术得到了穿透圆形夹杂界面的半无限楔形裂纹尖端螺型位错产生的应力场以及作用在位错上的位错力的解析表达式.主要讨论了螺型位错对裂纹的屏蔽效应以及从楔形裂纹尖端发射位错的临界载荷条件.研究结果表明正的螺型位错可以削弱楔形裂纹尖端的应力强度因子,屏蔽裂纹的扩展,屏蔽效应随位错方位角的增大而减小.位错发射所需的无穷远临界应力随发射角的增加而增大,最可能的位错发射角度为零度,直线裂纹尖端位错的发射比楔形裂纹尖端位错的发射更容易,硬基体抑制位错的发射.
英文摘要：
The interaction between a screw dislocation and a semi-infinite wedge crack penetrating a circular inhomogeneity is investigated.Using Riemann-Schwartz＇s symmetry principle integrated with the analysis of singularity of complex functions,the closed form solutions of the complex potentials in both the semi-infinite matrix and the semi-circular inhomogeneity are obtained when screw dislocation located in the semi circular inhomogeneity.The expressions of stress field in the inhomogeneity and the force acting on dislocation when a semi-infinite wedge crack penetrates the inhomogeneity are derived by using the conformal mapping technique.The shielding effect and the emission criterion of the screw dislocation are discussed in detail.The results show that positive dislocation can reduce the stress intensity factor of the wedge crack and shield the crack growth.The shielding effect decreases with the increment of dislocation azimuth angle.The critical load at infinity for dislocation emission increases with the increment of emission angle,and the most probable angle for screw dislocation emission is zero.Comparing with the case for a straight-line crack,the emission of the dislocation from a wedge crack becomes more difficult.In addition,the hard matrix can enhance the critical load for the dislocation emission.
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
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
Edge misfit dislocation formation at the interface of a nanopore and infinite substrate with surface
Subsurface damage mechanism of high speed grinding process in single crystal silicon revealed by ato
Effect of grinding wheel spindle vibration on surface roughness and subsurface damage in brittle mat
The interaction between an edge dislocation and a semi-infinite long crack penetrating a circular in
High-temperature creep associated with the climb of extended dislocations subjected to chemical stre
Effect of cooperative grain boundary sliding and migration on dislocation emitting from a semi-ellip
Analytical modeling of dislocation effect on diffusion induced stress in a cylindrical lithium ion b
The interaction between a piezoelectric screw dislocation and a semi-elliptical surface crack in pie
Edge misfit dislocations in core-shell nanowire with surface/interface effects and different elastic
Scratching of copper with rough surfaces conducted by diamond tip simulated using molecular dynamics
The Interaction between a Piezoelectric Screw Dislocation Dipole and an Elliptic Blunt Crack in Elli
Diffusion-induced stress and strain energy affected by dislocation mechanisms in a cylindrical nanoa
Effect of nanograin boundary sliding on nanovoid growth by dislocation shear loop emission in nanocr
Creep behavior as dislocation climb over NiAl nanoprecipitates in ferritic alloy: The effects of int
Subsurface damage mechanism of high speedgrinding process in single crystal silicon revealed by atom
期刊信息
位置：