Results 241 to 250 of about 519,341 (276)

An Inverse Method for Reconstruction of the Residual Stress Field in Welded Plates

Journal of Pressure Vessel Technology, 2010
Welding process is widely used in manufacturing of many important engineering components. For such structures, the most important problem is the development of residual stresses and distortion due to welding. Welding tensile residual stresses have a detrimental effect and play an important role in an industrial environment.
G. H. Farrahi, S. A. Faghidian, D. J. Smith   +2 more
openaire   +1 more source

Field Inversion For Transitional Flows Using Continuous Adjoint Methods

The Physics of Fluids, 2022
Transition modeling represents one of the key challenges in computational fluid dynamics (CFD). While numerical efforts were traditionally devoted to either improving Reynolds-averaged Navier-Stokes (RANS)-based turbulence modeling or developing scale ...
A. Hafez, A. A. Abd El-Rahman, H. Khater
semanticscholar   +1 more source

A short note on the inversion of tectonic stress fields

Tectonophysics, 1983
Abstract Works on global and regional stress fields are briefly reviewed. Questions encountered in computing tectonic stress fields are listed as: the earth model, driving forces, distinguishing criteria and residual stress. For the linear elastic case, a scheme making use of the superposition principle and the method of least squares is described in
openaire   +1 more source

The study of thermal and stress field inversion techniques based on sparse test data

International Conference on Electronic Packaging Technology
With the advancement of semiconductor and advanced packaging technologies, the integration level of microsystems has continuously increased. High-density integration has led to prominent issues such as packaging-induced residual stress, thermal mismatch,
Hong-Hui Li, Yu Ren, Shi-Qi Jia, Rui-Wen Liu, Bin-Bin Jiao, Yan-Mei Kong, Yu-Xin Ye   +6 more
semanticscholar   +1 more source

Focal mechanisms and moment magnitudes of micro-earthquakes in central Brazil by waveform inversion with quality assessment and inference of the local stress field

Journal of South American Earth Sciences, 2016
Juraci Carvalho, Jiri Zahradnik, Lucas Vieira Barros   +2 more
exaly   +2 more sources

Inversion Technique To Determine the In-Situ, Stress Field From Fracturing Data

Proceedings of SPE Annual Technical Conference and Exhibition, 1988
ABSTRACTTypically one assumes that the two horizontal in-situ stresses are equal in borehole stability studies. This simplification has been necessary due to lack of information. The new method presented here distinguishes between the in-situ stresses and estimates the magnitude and the direction of each of the two horizontal in-situ stresses.
openaire   +1 more source

Travel time inversion for the determination of stress fields in granular soil media

Inverse Problems in Engineering, 1999
Transmission photoelasticity is a well established procedure for solid bodies; to the authors' knowledge there is no corresponding technique for particulate media, especially granular soil media. This paper presents such a procedure using the crosshole seismic probing common to geophysical imaging.
Abbas M. V. Samani, G. M. L. Gladwell
openaire   +1 more source

Stress field modelling of the Late Oligocene tectonic inversion in the Liaodong Bay Subbasin, Bohai Bay Basin (northern China): Implications for geodynamics and petroleum accumulation

Journal of Geodynamics, 2019
The Liaodong Bay Subbasin (LDBS), Bohai Bay Basin, is one of the most petroliferous basins in China. The basin experienced a strong tectonic inversion in the Late Oligocene, which has been proven to have had a major influence on petroleum accumulation ...
P. Hu, Feng Yang, Li-Xin Tian, Kui Wu, Wei Wang   +4 more
semanticscholar   +1 more source

On a Certain Inverse Problem of Coupled Thermal Stress Fields in a Thick Plate

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 1988
AbstractDie vorliegende Arbeit befaßt sich mit einem inversen Problem für ein axialsymmetrisches, dreidimensionales Temperatur‐ und Wärmespannungsfeld für eine dicke Platte, wobei das Kopplungsglied betrachtet wird. Um eine Funktion zu erhalten, die die Temperatur des Heizmediums unter den vorgeschriebenen mechanischen Randbedingungen beschriebt, wird ...
openaire   +1 more source

Genetic Algorithm‐Finite Element Inversion of Stress Field of Brazil

Chinese Journal of Geophysics, 2000
AbstractBased on observed data on orientation of stresses in Brazil, a genetic algorithm‐finite element method (GA‐FEM) is applied to inverse the boundary displacement and nodal forces within the plate. The inversion confirms previous studies that plate boundary actions are main factors controlling the regional stress field, and spreading forces of ...
openaire   +1 more source