ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1976.tb00168.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

The production of Bauschinger Charts for six spring steels has been described in an earlier paper. The present paper shows that for four of these steels a common Bauschinger Chart can be produced. This chart is then used to predict the effective modulus of rigidity for an overstrained bar subjected to torsion in the overstraining direction. Comparisons are made between the results of practical tests, an empirical law derived from the experimental results and the theoretical predictions.

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1976.tb00169.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

The stresslstrain relation is initially discussed in general form. The normal matrix formulation employing the Lamé Constants and the more ‘practical’ formulation based on the Elastic Modulus and Poisson's Ratio are detailed.An alternative approach employing the wave speeds of the material as the basic material parameters is discussed. This approach has a number of advantages over the present tensile testing methods. The main advantages are that the properties can be obtained on the actual part or specimen without resorting to destructive testing means, and the data can be collected with the same strain gauge equipment that is to be employed in subsequent testing procedures.The problem associated with the measurement of short duration, low amplitude pulses is discussed and the broad details of the required instrumentation are given.Two simple experiments are illustrated in which firstly, the wave velocity in a bar is obtained and secondly, the dilatational and shear wave speeds are obtained in a plate struc

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1976.tb00170.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1976.tb00171.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1976.tb00172.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

During testing of a gas turbine engine with strain‐gauged parts, a three‐dimensional plot of stress amplitude and frequency against time (or engine speed) greatly facilitates presentation of data in an easily understandable form. It is shown how advances can be made from such ‘3D’ plots while presenting data rapidly, automatically and still in traditional formats. Examples are presented to indicate how such techniques can save analysis time, improve engineering understanding and enable a more rapid turn‐round of engine tests. The methods described also assist recovery of information which, by conventional methods, would be lost in background int

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1976.tb00173.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

A method of increasing the voltage output of a Wheatstone bridge having one or two active arms is discussed. An increase of 80% is shown to be practicable without increasing the current in the gauge. This is achieved by using an asymmetrical bridge configuration instead of the more usual symmetrical arrangement. The effect of this configuration on output linearity is considered and a bridge‐balancing circuit is illustrate

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1976.tb00174.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1976.tb00176.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1976.tb00178.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY