نتایج جستجو برای: thermoelastic stresses
تعداد نتایج: 42381 فیلتر نتایج به سال:
The thermoelastic stress analysis for linear thermoelastic bodies is developed as a mathematical support to the infra-red radiometric method (SPATE) applied to structures under cyclic loading conditions.
Thermal residual stresses in functionally graded materials (FGMs) arise primarily from nonlinear spatial variations in the thermal expansion coecient, but can be signi®cantly adjusted by variations in modulus. Thermoelastic analysis of FGMs is complicated by such modulus gradients. A class of problems for which thermal stress solutions for materials with constant modulus can be used as a basis...
Under the action of a stationary heat source, we construct Boussinesq functions problem thermoelasticity under conditions plane deformation semiinfinite body with free, rigidly, smoothly, or flexibly fastened boundary either kept at zero temperature thermally insulated. The construction is reduced to solving boundary-value problems for harmonic in half space. Relations displacements and stresse...
This paper provides a comprehensive derivation for thermoelastic damping (TED) in flexural-mode ring gyroscopes, in light of recent efforts to design high rateresolution gyroscopes. Imposing an upper limit on the attainable mechanical noise floor of a vibratory gyroscope, thermoelastic damping in a ring gyroscope is extracted from the equations of linear thermoelasticity. By assuming that it is...
This paper presents analytical models, as well as numerical and experimental verification of intrinsic dissipation due to thermoelastic loss in tuning-fork resonator. The thermoelastic analytical governing equations are created for resonator vibrating at drive-mode and sense-mode, and thermoelastic vibration field quantities are deduced. Moreover, the theoretical values are verified that coinci...
Plastic deformation causes very small changes in the thermoelastic response of metallic materials; this variation of the thermoelastic constant has the potential to form the basis of a new non-destructive, non-contact, full-field technique for residual stress assessment that is quicker and cheaper than existing methods. The effect of plastic strain on the thermoelastic constant is presented as ...
A methodology is presented for bounding all higher moments of the local hydrostatic stress field inside random two phase linear thermoelastic media undergoing macroscopic thermomechanical loading. The method also provides a lower bound on the maximum local stress. Explicit formulas for the optimal lower bounds are found that are expressed in terms of the applied macroscopic thermal and mechanic...
The macroscopic mechanical behaviour of granular materials is governed by microscopic features at the particle scale. Photoelasticimetry is a powerful method for measuring shear stresses in particles made from birefringent materials. As a complementary method, we here identify the hydrostatic stress networks through thermoelastic stress analysis using infrared thermographic measurements. Experi...
An extensive ice body is buried under less than 20 cm to several meters of debris in Beacon Valley (Dry Valleys, Antarctica). The thermal behavior of the upper 20 m of permafrost, including the annually freezing and thawing surface (active layer) in this region of low relative humidity and very low annual precipitation, has great scientific interest. Distinctly different behavior from wet, arct...
The current work takes the results of numerical experiment implemented in Ansys finite element analysis program to create neural network and regression models two-beam laser splitting silicate glasses. glass cutting have been obtained DesignXplorer module Workbench using a face-centered version central composite design. processing speed, parameters beams, plate thickness, distance between radia...
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