摘要:

AbstractThe Thin Layer Activation technique has been applied in order to study the flake‐off phenomenon on a jet engine's shaft bearing. The external track of the bearing has been activated following the reaction56Fe(p,n)56Co, over a depth of 80 μm. In spite of a very low activation level, the first signs of flaking‐off were detected 30 min before any significant increase in the vibration level appeared. At that point, the mass of particles leaving the track was measured on line, with a precision of 0.

ISSN:1354-4063    

DOI:10.1002/tt.3020010302

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

摘要:

AbstractModelling the wear test process can initiate real‐life friction and wear of components and cutting tools. In this paper we describe model wear tests that were developed to discover (a) whether or not simulation of the wear processes that occur during cutting is possible, and (b) how the wear of indexable inserts can be reduced by using thin hard coatings, e.g. TiN, (Ti,Al)N, Ti(C,N) when milling metallic materials. The real‐life wear of the track groups of various tracked vehicles was also investigated, in order to evaluate the wear resistance of certain materi

ISSN:1354-4063    

DOI:10.1002/tt.3020010303

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

摘要:

AbstractA small, economic, test rig to evaluate friction materials and fluids for wet clutch applications has been designed, built and commissioned. In this paper, the construction, operation and performance of the machine are described, and results are presented, for two sets of typical tests. The system is capable of recording data, and torque test track, coefficients of friction, and oil temperature rise, are given.

ISSN:1354-4063    

DOI:10.1002/tt.3020010304

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

摘要:

AbstractIn order to understand the effects of contact shape and sliding direction on tangential coefficient a VTR (Video Tape Recorder) computer system has been developed to visualise the micro‐slip distribution at the contact interface, during the process of micro displacement, before macro sliding.It is shown that micro‐slip distribution is strongly affected by the shape of the contact area and the sliding direction, which gives a good explanation of the observed relationships between tangential coefficient (defined as tangential force divided by normal load) and tangential displacement.It is suggested, as a result, that the VTR‐computer system developed in this study allows useful observation and understanding of the micro‐mechanism of initiation of macro

ISSN:1354-4063    

DOI:10.1002/tt.3020010305

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

ISSN:1354-4063    

DOI:10.1002/tt.3020010306

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

ISSN:1354-4063    

DOI:10.1002/tt.3020010307

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

ISSN:1354-4063    

DOI:10.1002/tt.3020010308

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

ISSN:1354-4063    

DOI:10.1002/tt.3020010309

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

ISSN:1354-4063    

DOI:10.1002/tt.3020010301

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY