摘要:

To simulate the thermo/mechanically /chemically dominated wear in very high slip rate interfaces involving heavily loaded deformable elastomeric composite media, Part 1 of this series develops the requisite modeling scheme. Included is the development of a new Lagrange-Fourier formulation for conduction and thermally induced material degradation-wear in highly strained media. In this part, a specialized numerical procedure is derived to handle the sharp thermomechanical gradients and concomitant thermo/mechanical/chemical degradation-wear. This is achieved via a computationally efficient telescoping mesh enrichment scheme. The methodology self-adaptivety accommodates the hierarchy of scaling levels in the problem and conforms to the rapidly moving zone of material degradation-deposition and wear. To benchmark the modeling procedure and associated numerical solution algorithm, a series of empirically verified parametric studies are included in the presentation.

ISSN:0149-5739    

DOI:10.1080/01495739408946243

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

ISSN:0149-5739    

DOI:10.1080/01495739408946244

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Presented are formulations and calculations of elastic stress and displacement fields within an evolving thermal mound present on the interface between a carbon graphite brush sliding against a fast moving rotor. Thermal mound temperatures, due to frictional and electrical power dissipation about the discrete brush to rotor contact spots, evolve from cold to hot and are based on the thermally nonlinear temperature fields calculated by Yune and Bryant. Presented are thermoelastic surface displacements and thermoelastic stresses that correspond to the aforementioned temperature fields. Also presented are values of contact length, normal approach, and contact pressures that exist when the thermoelastically induced surface curvatures are pressed flat by prescribed normal and tangential surface tractions.

ISSN:0149-5739    

DOI:10.1080/01495739408946245

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The effect of a surface crack on the strain energy release rate Gifor an interface crack between two dissimilar materials subjected to a transient thermal load is studied. It is shown that the presence of a surface crack is detrimental to the interface crack Consideration of the surface crack shows that the longest crack does not experience the largest Gs. A top layer with the smallest modulus of elasticity and a thermal expansion coefficient approximately 10 percent smaller than that of the bottom layer results in the smallest maximum strain energy release rates for both cracks.

ISSN:0149-5739    

DOI:10.1080/01495739408946246

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

In this work the fundamental problem of thermoelasticity for an infinite spherically symmetric space is solved using the method of potentials. The differential equations for the potential are solved using the operational method together with the Laplace transform techniques to obtain the solution in the form of an infinite series of functions. The solution obtained is valid for all times.

ISSN:0149-5739    

DOI:10.1080/01495739408946247

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

A theorem on the uniqueness of solution of the mixed initial-boundary ualue problem is obtained, under less restrictive conditions, in the context of the linearized isotropic nonlocal thermoelasticity theory.

ISSN:0149-5739    

DOI:10.1080/01495739408946248

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The linear Chen-Gurtin theory of heat conduction in deformable materials is used to study the propagation of one-dimensional harmonic waves in infinite media with thermal memory. A dispersion relation is derived and asymptotic dependences for phase velocities and damping coefficients of waves are investigated. As a result of the dispersion equation numerical solution, the frequency dependences of phase velocities and damping coefficients of thermoelastic waves are obtained and analyzed. It is shown that with allowance for the thermal memory (he solution yields increased velocities and enchanced damping of thermoelastic waves as compared to the Lord-Shulman generalized thermomechanical model (GT-model).

ISSN:0149-5739    

DOI:10.1080/01495739408946249

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

A thin cylindrical shell under general thermal and mechanical shocks is considered. The fields of displacements and temperature are assumed to be coupled through a system of dynamic thermoelastic equations. The method of solution is based on Galerkin finite element and Kantorouich approximation for space and time domains. The approximation is applied to the lateral deflection of the shell, the mean wall temperature, and the thermal gradient through the thickness. The resulting thermal stress waves, temperature wave, and displacement waves are obtained and plotted.

ISSN:0149-5739    

DOI:10.1080/01495739408946250

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

In this section, publications on thermal stresses that have appeared elsewhere are listed. In order to make the list as complete as possible, authors are requested to submit two copies of their publications to the Editor-in-Chief. Publications in languages other than English should be accompanied by the English translation of their titles.

ISSN:0149-5739    

DOI:10.1080/01495739408946251

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor