ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1990.tb00716.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

The determination of through thickness residual stresses in pipes and pressure vessels is of growing interest because of emphasis placed on life prediction, design, and failure analysis of piping systems. Most of the through thickness residual stress measurement techniques require the placement of gauges on the outside and inside of the pipe. These methods are severely hampered when gauges cannot be placed on the inside of the pipe. This constraint could arise for small diameter pipes, long pipes or for pipes that have been used in a service condition causing corrosion or fouling of the inner surface.This paper focuses on the first step of a three step procedure for determining residual hoop stresses in thin walled pipes and tubes. The method described is designed for cases where it is impossible to place gauges on the inside of the pipe. The method yses biaxial strain gauges on the outside of the pipe and involves a through thickness axial cut of the pipe. Based on the change in strain on the outside of the pipe, changes in the hoop residual stress distribution due to the axial cut are obtained with the method presented here. The method provides a means to evaluate changes in stresses on both the outside surface and the inside surface of the pipe as well as an evaluation of the change in through thickness hoop stress distribution at any location in the pipe cross section. This paper further demonstrates that the problem of shortening long pipes to enable placement of gauges on the inside of the pipe can result in the loss of significant residual stress information.

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1990.tb00717.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

The dissolved oxygen content of water influences the susceptibility of austenitic stainless steels and reactor pressure vessel steels to environment assisted cracking by raising the electrochemical potential. The relevance of this fact to the integrity of welded stainless steel constructions, deaerator vessels and reactor pressure vessels steels is discussed. In particulal, the use of slow strain rate test procedures involving applied electrochemical potential control is discussed as a means of assessing the susceptibility to cracking of materials in a range of aqueous environments.

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1990.tb00718.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Moiré interferometry maps the in plane displacement components with very high sensitivity. However, in most applications only normal strain components are derived from these contour maps. With the advent of composite materials and adhesive bonded joints measurement of shear strain is becoming increasingly important. This paper looks at measurement errors likely to occur in shear strain derivation

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1990.tb00719.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Experimental tests were carried out on pull‐out concrete speciments with 8 mm dia. tor steel bars to examine the extent of deterioration of bond at the interface of steel and concrete afer exposure of the speciments up to 800°C furnace temperature. The bond stress‐slip behaviour was examined and acoustic emission monitored simiultaneously. The bond stress‐emission and slip‐emission were compared and correlated with the bond stress‐slip behaviour for speciments subjected to diferent levels of temperature both in the heated as well as the residual conditions. Random samples of waveforms of the emission for specific levels of temperature were compared with respect to the amplitude and time period of the pulses as well as the occurrence of reflections etc. Consequently attempts were made to utilise acoustic emission behaviour in establishing the trend of bond degradation in reinforced concrete by heat effects. The control of variable was the level of temperatur

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1990.tb00720.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

摘要:

Book reviewed in this article:Materials data for cyclic loading, Parts A to E by C Boller and T SeegerThe finite element method, Vol.1, 4th Edition by O C Zienkiewicz and R L TaylorMechanical damage and crack growth in concrete, by A Carpinteri

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1990.tb00721.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1990.tb00722.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1990.tb00723.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1990.tb00724.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY

ISSN:0039-2103    

DOI:10.1111/j.1475-1305.1990.tb00725.x

出版商:Blackwell Publishing Ltd    

年代:1990

数据来源: WILEY