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【期刊论文】A moving piezoelectric screw dislocation
仲政, X. Wang *, Z. Zhong
Mechanics Research Communications 29(2002)425-429,-0001,():
-1年11月30日
A moving screw dislocation in a transverselyisotropic piezoelectric material is investigated in detail. The analytical expressions for displacement, electric potential, stresses, electric displacements, strains, and electric fields are obtained.When the velocityof the dislocation is zero, or when the piezoelectric constant is zero, the results derived in this paper can reduce to known results.
Moving screw dislocation, Piezoelectric material
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仲政, Z. Zhong a, *, Q.P. Sun b
International Journal of Solids and Structures 39(2002)5753-5765,-0001,():
-1年11月30日
This paper studies a transversely isotropic rod containing a single cylindrical inclusion with axisymmetric eigenstrains. The analytical elastic solution is obtained for the displacements, stresses and elastic strain energy of the rod. The effects of microstructural parameters and its evolution on the elastic stress and strain fields as well as the strain energy of the rod are quantitatively demonstrated through examples.
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仲政, Bo Jin *, Zheng Zhong
International Journal of Engineering Science 40(2002)637-646,-0001,():
-1年11月30日
This paper considers the transient stress intensity factor (Mode Ⅰ) of a penny-shaped crack in an in.nite poroelastic solid. The crack surfaces are impermeable. By virtue of the integral transform methods, the poroelastodynamic mixed boundary value problems is formulated as a set of dual integral equations, which, in turn, are reduced to a Fredholm integral equation of the second kind in the Laplace transform domain. Time domain solutions are obtained by inverting Laplace domain solutions using a numerical scheme. A parametric study is presented to illustrate the in.uence of poroelastic material parameters on the transient stress intensity. The results obtained reveal that the dynamic stress intensity factor of poroelastic medium is smaller than that of elastic medium and the poroelastic medium with a small value of the otential of diusivity shows higher value of the dynamic stress intensity factor.
Poroelastic solid, Penny-shaped crack, Transient stress intensity factor for Mode Ⅰ problem
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仲政, Qing-Ping Sun a, *, Zheng Zhong
International Journal of Plasticity 16(2000)1169-1187,-0001,():
-1年11月30日
In this paper, we present analytical modelling for the pure mechanical response of uniaxial tensioned NiTi wire that experiences stress-induced martensitic transformation via a propa-gating martensite band at the superelastic temperature regime. The model aims to predict the overall behavior of the SMA wire as a structural response containing propagating instabil-ities. Based on the systematic experimental investigation of Shaw and Kyriakides (Shaw, J.A., Kyriakides, S., 1995. Thermomechemical aspects of NiTi. J. Mech. Phys. Solids 43, T243
A., Phase transformation, B., Propagating instability, B., Polycrystalline NiTi shape memory alloy, C., Energy method
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【期刊论文】On the elastic axisymmetric deformation of a rod containing a single cylindrical inclusion
仲政, Z. Zhong a, Q.P. Sun b, *, P. Tong b
International Journal of Solids and Structures 37(2000)5943-5955,-0001,():
-1年11月30日
This paper studies the axisymmetric deformation of a rod containing a single cylindrical transformation inclusion with uniform axisymmetric eigenstrain. Elastic solutions of the problem are obtained by means of the principle of superposition. The original problem is divided into two sub-problems to derive the analytical expressions for the displacements, the stresses and the elastic strain energy of the whole rod. Quantitative pictures on the stress and strain jumps across the inclusion-matrix interface and on the evolution of the strain energy of the whole rod are illustrated. The results show that the normalized elastic strain energy depends on the relative length of the cylindrical inclusion for the length
Elastic rod, Cylindrical inclusion, Eigenstrain, Axisymmetric deformation
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