ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00289.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Perpendicular sections of caustic surfaces reflected by the constrained zone around the tip of an arched crack in a perspex plate under plane tension, were measured and analysed. The experiments corroborated the theory, the Theocaris' method of Caustics and also show that the intensity factors are functions of the curvature of the crack and the subtended angle.

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00290.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

The problems of interpreting and analysing photo‐elastic data have deterred non‐specialists from making use of this technique when undertaking detailed design studies. Practical difficulties in understanding complex fringe patterns and in making the necessary optical measurements with sufficient precision have implied that considerable experience is necessary to obtain reliable stress values at internal points or across critical sections.By interconnecting two minicomputers it has been possible to develop an interactive polariscope control system which will allow the design engineer, with minimal prior knowledge of photoelastic techniques, to employ relatively sophisticated methods for evaluating the stresses in both two and three dimensional models. The data acquisition sequence involves new procedures for determining both the isoclinic angle and the isochromatic fringe number, and the interactive nature of the control system allows the desired analysis to proceed in response to the replies to a series of simple questions posed by the machine.The application of the system will be illustrated by examples of its use to determine boundary stresses at critical locations, where the high stress gradient presents problems, and in evaluating the separate stress components across the critical section of a grooved cylindrical

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00291.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

This paper reports on part of a research programme which was carried out using two‐ and three‐dimensional photoelastic model techniques in order to analyse the stress distributions in a double‐helical epicyclic gear design incorporating typical features of production gear units.The paper describes the testing of two three‐dimensional models, one subjected to torque loading, i.e. tooth forces; the other to combined rotational and torque loading. Note is made of some of the problems inherent in the design and loading of complex models such as those used in the tests and of the solutions developed to overcome the difficulties.Attention is devoted to the analysis of contact loads and load distribution, maximum sub‐surface stresses, maximum root fillet bending stresses and the geometry of the lines of contact. General conclusions are drawn and an indication given of the subsequent extensive two‐dimensional test programme which was

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00292.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

A new image‐Moiré method yielding directly the partial slope distribution in bent plates is proposed. The fringes are formed by the interference between the grating on the front face of a transparent plate with its reflected image through it on the other face. In illustration of the applicability of the method, results for a centrally loaded simply supported circular plate are present

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00293.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00294.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00295.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Book reviewed in this article:Theory and Practice of Engineering with Rubber by P. K. Freakle y and A. R. PayneDevelopments in Stress Analysis 1, Edited by G. S. Holister

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00296.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1979.tb00297.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY