摘要:

In this article, the thermal stresses in a nonhomogeneous orthotropic elastic multilayered cylinder subject to certain boundary conditions are studied. Thus, an exact solution for a multilayered cylinder is obtained. The dynamic thermal stresses in a multilayered cylinder are determined. Numerical results are obtained for the stress, displacement component, and temperature for a two-layered cylinder as a special case.

ISSN:0149-5739    

DOI:10.1080/014957300403914

出版商:Informa UK Ltd    

年代:2000

数据来源: Taylor

摘要:

This article deals with the transient thermoelastic analysis for dissimilar materials under the plane strain condition. In the process of the boundary element formulation, the time-dependent fundamental solution for the transient heat conduction problem and the thermoelastic displacement potential for the transient thermal stress problem are introduced. Consequently, domain integrals are completely eliminated. The discretization based on the domain combination method for these boundary integral equations is implemented, and the transient temperature and stress fields are analyzed numerically. The transient temperature at the lateral surface and the transient thermal stress at the interface are investigated for the three categories that have been determined according to the characteristic equation expressed by Dundurs parameters.

ISSN:0149-5739    

DOI:10.1080/014957300403923

出版商:Informa UK Ltd    

年代:2000

数据来源: Taylor

摘要:

In this study, we treat the behavior of a piezothermoelastic composite plate taking into account the effects of transverse shear and coupling among mechanical, thermal, and electrostatic fields. As an analytical model, we consider a rectangular laminate composed of several fiber-reinforced laminae and a piezoelectric layer. All the laminae are assumed to exhibit 2-mm symmetry and the principal axes of anisotropy to coincide with coordinate axes, that is, a cross-ply laminate is considered. We assume that the laminate is subjected to mechanical, thermal, and electrical loads with all edges simply supported and treat the problem as a coupled piezothermoelastic one. Numerical calculation is carried out to examine the effects of transverse shear and coupling on the behavior of the laminate. Moreover, the control of the deflection by applied voltage is examined.

ISSN:0149-5739    

DOI:10.1080/014957300403932

出版商:Informa UK Ltd    

年代:2000

数据来源: Taylor

摘要:

A contour integral is applied to the evaluation of the stress intensity factors at interface corners of bimaterial joints subjected to a uniform change in temperature. In order for the contour integral to work for the free-edge stress intensity factors, closed-form solutions for the stress and displacement fields near interface corners of bimaterial joints subjected to a uniform temperature change are derived. The derivation is based on the hypothesis that the two dissimilar materials, which are bonded along their common interface, experience identical rigid body displacements. Accordingly, the asymptotic displacements are continuous along the interface irrespective of the rigid body displace ments near the interface corner. A case study is carried out for a problem where the combination between the material properties and the geometry at the interface corner is such that the stresses at the interface corner are comprised of several stress fields of the form Hr

ISSN:0149-5739    

DOI:10.1080/014957300403941

出版商:Informa UK Ltd    

年代:2000

数据来源: Taylor

摘要:

We investigate the deformation of an infinitely long, circular cylindrical electric conductor carrying a uniform axial current, for the case when the electric conductivity of the coating is temperature dependent. This model conforms with the real situation for many of the existing modern dc cables with polyethylene coating. The distributions of temperature, magnetic field, stresses, and displacements in the cable are obtained and discussed under a thermal radiation condition at the boundary of the cable. In particular, it appears that there is a critical temperature for the ambient medium to the cable, above which no solution for the steady heat problem can exist and the thermal equilibrium of the cable is no longer fulfilled. A formula for the calculation of this critical value is given, which may turn out to be of practical importance for a reliable design of the cable. The obtained results also show that the electric conductivity of the coating strictly decreases as one moves from the core to the boundary of the cable in conformity with the behavior of temperature. Some numerical results are presented.

ISSN:0149-5739    

DOI:10.1080/014957300403950

出版商:Informa UK Ltd    

年代:2000

数据来源: Taylor

摘要:

A refined single-layer thermoelastic model of composite laminated cylindrical shells is presented using a mixed variational approach. The present model accounts for Reissner-Mindlin?s displacement assumptions and continuous stress distributions through the thickness. Therefore the present first-order shell theory recovers the actual interlami nar stress state without losing its simplicity and leads to a consistency with the elasticity theory. Furthermore, the stresses are consistent with surface conditions. So, the rationale for the shear correction factors used in other first-order theories are obviated. Governing equations including thermomechanical effects are deduced with the required boundary conditions. A wide variety of numerical results for cross-ply symmetric and antisymmetric laminated circular cylindrical shells are presented for various boundary conditions. A bending analysis is made to illustrate the influences of orthotropy, the length-to-radius ratio, the radius-to-thickness ratio, the number of layers, and boundary conditions on the thermal responses.

ISSN:0149-5739    

DOI:10.1080/014957300403969

出版商:Informa UK Ltd    

年代:2000

数据来源: Taylor

ISSN:0149-5739    

DOI:10.1080/014957300403978

出版商:Informa UK Ltd    

年代:2000

数据来源: Taylor