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thermoelastic stress analysis of a Finite Structure Containing an Asymmetrical-Oriented, Arbitrarily-Shaped Hole

Journal of Mechanics Engineering and Automation 2017年第3期7卷 145-159页

作者： S. Kurunthottikkal Philip R. E. Rowlands Cummins Westport lnc (WPI) Columbus IN47201 USA Department of Mechanical Engineering University of Wisconsin-Madison Madison WI 53 706 USA

stresses, particularly those at geometric discontinuities, influence the structural integrity of engineering components. Motivated by the prevalence of complicated-shaped perforated components, the objective of this paper is to demonstrate the ability to stress analyze loaded finite members containing asymmetrical, irregularly-shaped cutouts. Recognizing the difficulties in obtaining purely theoretical or numerical solutions for these situations, the paper presents an expeditious means of experimentally stress analyzing such structures. Processing the load-induced temperature information with a series representation of a stress function provides the independent stress components reliably full-field, including on the edge of a hole. The stresses satisfy equilibrium and strains satisfy compatibility. In addition to being able to stress analyze complicated shapes using real, rather than complex variables, the technique is significant in which it smooths the recorded thermal information, is widely applicable, and requires neither differentiating the measured data nor knowing the elastic properties or external boundary conditions. The latter is extremely important since the external loading is often unknown in practice. That the approach provides the independent stresses is also significant since fatigue analyses and strength criteria typically necessitate knowing the individual components of stress. Present results are supported by those from a finite element analysis, strain gage measurements and load equilibrium.

关键词： Irregular cutouts stresses thermoelastic stress analysis finite structure.

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thermoelastic stress analysis of holes in cylindrical shells

Thermoelastic stress analysis of holes in cylindrical shells

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作者： S.Quinn J.M.Dulieu-Barton NNC Ltd. Booths Hall Chelford Road Knusford Cheshire WA16 8QZ UK University of Southampton School of Engineering Sciences Highfield Southampton SO17 1BJ UK

＜正＞ thermoelastic stress analysis is used to obtain the stress concentration factors （SCFs） from a variety of circular holes in cylinders. The cylinders are loaded in uniaxial tension, uniaxial compression and a combination of bending and compression. Firstly radial holes are investigated and the results from the thermoelastic data obtained by the SPATE equipment are compared to previous experimental and numerical work. SCFs are then obtained from offset, oblique and offset-oblique holes using the Deltatherm system. The effect of hole obliquity and direction of applied load relative to the hole geometry is discussed.

关键词： thermoelastic stress analysis SPATE deltatherm offset oblique and offset-oblique holes cylinders stress concentration factors (SCFs)

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