ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1992.tb00808.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractA key requirement for most engineered items is the ability to withstand the various loads that may be applied under conditions of use and of abuse that may reasonably be foreseen. To ensure that the strength requirement is satisfied, the designer must evaluate the levels of applied stress using appropriate calculation methods or by physical experiment. This paper considers the respective roles of computational and experimental methods of stress analysis, discussing the impact of changes in functional capability. Reference is made to the modern certification environment and the requirements of quality assurance, particularly related to the training of engineers and technicians in the necessary skills.The paper aims to present a balanced view of the role of experimental stress analysis, identifying areas where there are clear benefits. Some concluding comments are made regarding education, training and vocational qualifications.

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1992.tb00809.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractAn interlock tube, usually made of stainless steel, is one of the key structural components for both bonded and unbonded flexible pipes of composite construction. The fatigue performance of this component is an important factor in determining the long term integrity of the entire pipe.This paper presents an experimental technique developed for the establishment of the basic fatigue characteristics of such interlock tubes. Details of the fatigue testing method, the specimen design, preparation and calibration procedures will be described in conjunction with tests carried out on 254 mm interlock tube samples.One of the most important results from this work is that, by careful design and machining of the specimen, the mode of failure seen in full scale pipe samples can be reproduced on small specimens in a laboratory using a fatigue machine. The significance of this is that it is possible to obviate the necessity for expensive full scale composite pipe testing, provided that an accurate description of the loading conditions imposed on components of the composite is available.

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1992.tb00810.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractA large scale model analysis, using embedded strain gauges, of the strain distribution in the cement mantle surrounding a femoral prosthesis is underway. In order to predict, and so avoid, positions of locally high strain gradients in this model, a finite element and experimental analysis of a similar problem was undertaken. For this purpose, a loose fitting rectangular steel insert inside a surrounding rectangular epoxy sheath was used to model an extreme case of the torsional and bending components of hip joint load. The axial component of joint load was modelled using an axisymmetric finite element model of a tapered shaft. The finite element results were used to determine suitable positions for embedding gauges in the experimental model. Results showed that the finite element analysis failed to adequately model the close sliding fit between the steel insert and epoxy. Altering the experimental model to artificially replicate the finite element contact conditions produced good correlation in bending, with experimental strains agreeing with simple bending theory to within 6%. Satisfactory correlation under torsional loading was not obtained, but strain magnitudes were low. Predicted positions for embedding gauges give conservative results, lessening the possibility of strain gradient induced error in the large scale model test of the cement mantle and prosthesis.

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1992.tb00811.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractCurrent developments in the automation of photoelastic analysis have enabled the fast and accurate collection of the isochromatic and isoclinic parametersl from photoelastic specimens. Since the isochromatic parameter yields the difference in the principal stresses then a suitable procedure has to be used for their separation. This paper provides a survey of the stress separation techniques available with a view to incorporating the most suitable method into an automated full field polariscope.

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1992.tb00812.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Book reviewed in this article:“Business fundamentals for engineers” by C. Kuo“Stability of large structures”, by K.A. Zalka and G.S.T. Armer“Corrosion atlas” by E.D.D. During, 2nd Edition,

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1992.tb00813.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1992.tb00814.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1992.tb00815.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1992.tb00816.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1992.tb00817.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY