Institute of Applied Physics

http://iaph.bas-net.by/  
220072 Minsk, Akademicheskaya str. 16, tel. +375 (17) 357-67-94

Method and equipment for control of tensile stress in pins of power equipment

COUNTRY OF ORIGIN

Belarus

IDENTIFIER

TO3392

PUBLISHED

2021-01-22

LAST UPDATE

2021-01-22

DEADLINE

Linked profile in other language
Responsible
Larisa Zezetko
+375172842415
zezetko@iaph.bas-net.by
Description
The method is based on the use of the acoustoelasticity phenomenon, the essence of which is the dependence of elastic moduli on mechanical stresses. The speed of elastic waves is used as an information parameter. By changing the propagation velocity of the corresponding elastic wave mode, it is possible to estimate the stresses arising in the threaded joint, and hence the degree of tightening. Tightening the threaded connection can cause the stud or bolt to elongate, which additionally contributes to the measured parameters. All of these factors influence the measurement results.
The set of equipment consists of a primary converter, a generation-receiving unit, a control computer and software. It is possible not only to monitor the tightening process, but also to diagnose the condition of the tightened studs.
Advantages and Innovations
The advantage of the proposed method lies in the use of several modes of elastic vibrations. The change in the propagation velocity difference due to tightening is measured and converted to voltage units.
The cost of a set of equipment does not exceed USD 10,000.
Stage of development
Field tested/evaluated (TRL8)
Funding source
State budged
Internal
IPR status
Exclusive rights
Secret know-how
Sector group
Aeronautics, Space and Dual-Use Technologies
Agrofood
Materials
Mobility
Sustainable Construction

Client information

Already engaged in transnational cooperation
Yes
Languages spoken
English
Russian

Information about partnership

Type of partnership considered
Commercial agreement with technical assistance
License agreement
Type and size of partner sought
251-500
SME <= 10
SME 11-50
SME 51-250

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