Test bench for fatigue failure investigation by combination of acoustic emission, surface strain mapping and tensometry
Based on industrial servohydraulic testing machine the authors have designed a laboratory setup for studying behavior of structural material samples under cyclic testing. It includes in situ strain gauging data registration, surface strain mapping and acoustic emission data. Taking into account cycl...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2019-05-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya-tpu.ru/archive/article/view/1425 |
| _version_ | 1827934464197525504 |
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| author | Sergey Panin Anton Byakov Pavel Lyubutin Ramasubbu Sunder Viktor Grenke Igor Shakirov Oleg Bashkov |
| author_facet | Sergey Panin Anton Byakov Pavel Lyubutin Ramasubbu Sunder Viktor Grenke Igor Shakirov Oleg Bashkov |
| author_sort | Sergey Panin |
| collection | DOAJ |
| description | Based on industrial servohydraulic testing machine the authors have designed a laboratory setup for studying behavior of structural material samples under cyclic testing. It includes in situ strain gauging data registration, surface strain mapping and acoustic emission data. Taking into account cyclic pattern of loading application the algorithms for information acquisition were offered that provides synchronization of surface image capturing with loading as well as detecting acoustic emission signals from input data flow. The operation principle of the setup is underlined by detecting and joint analysis of characteristic stages of informative parameters changing: shear strain intensity, acoustic emission activity and specimen elongation as a function of number of loading cycles. The authors tested the setup designed under tension of A7075 alloy specimens. It is shown that changing of all three informative parameters (registered by three different sensors) in time is characterized by 3 pronounced stages. The beginning of the III stage (crack propagation) coincides well for all three dependences. Difference in time of the II stage beginning is most probably related to a couple of reason. For surface strain mapping it is governed by low resolution of optical system that does not allow revealing deformation development at low spatial scales. For acoustic emission method it is associated with sensitivity of the technique to deformation mechanisms of microscale level as well as high deformation intensity at the onset of cyclic loading. If this takes place finite sensitivity of AE equipment did not allow registering all informative acoustic emission signals. The development of the offered technique and the setup is related to use of several AE sensors for solving the problems of AE source location and identification. The optical sensors of higher resolution will be attracted as well in order to increase sensitivity of stain measurement by optical technique. |
| first_indexed | 2024-03-13T07:38:56Z |
| format | Article |
| id | doaj.art-b1606886757246f38347017dc9ba312a |
| institution | Directory Open Access Journal |
| issn | 2500-1019 2413-1830 |
| language | Russian |
| last_indexed | 2024-03-13T07:38:56Z |
| publishDate | 2019-05-01 |
| publisher | Tomsk Polytechnic University |
| record_format | Article |
| series | Известия Томского политехнического университета: Инжиниринг георесурсов |
| spelling | doaj.art-b1606886757246f38347017dc9ba312a2023-06-03T21:08:12ZrusTomsk Polytechnic UniversityИзвестия Томского политехнического университета: Инжиниринг георесурсов2500-10192413-18302019-05-013252Test bench for fatigue failure investigation by combination of acoustic emission, surface strain mapping and tensometrySergey PaninAnton ByakovPavel LyubutinRamasubbu SunderViktor GrenkeIgor ShakirovOleg BashkovBased on industrial servohydraulic testing machine the authors have designed a laboratory setup for studying behavior of structural material samples under cyclic testing. It includes in situ strain gauging data registration, surface strain mapping and acoustic emission data. Taking into account cyclic pattern of loading application the algorithms for information acquisition were offered that provides synchronization of surface image capturing with loading as well as detecting acoustic emission signals from input data flow. The operation principle of the setup is underlined by detecting and joint analysis of characteristic stages of informative parameters changing: shear strain intensity, acoustic emission activity and specimen elongation as a function of number of loading cycles. The authors tested the setup designed under tension of A7075 alloy specimens. It is shown that changing of all three informative parameters (registered by three different sensors) in time is characterized by 3 pronounced stages. The beginning of the III stage (crack propagation) coincides well for all three dependences. Difference in time of the II stage beginning is most probably related to a couple of reason. For surface strain mapping it is governed by low resolution of optical system that does not allow revealing deformation development at low spatial scales. For acoustic emission method it is associated with sensitivity of the technique to deformation mechanisms of microscale level as well as high deformation intensity at the onset of cyclic loading. If this takes place finite sensitivity of AE equipment did not allow registering all informative acoustic emission signals. The development of the offered technique and the setup is related to use of several AE sensors for solving the problems of AE source location and identification. The optical sensors of higher resolution will be attracted as well in order to increase sensitivity of stain measurement by optical technique.http://izvestiya-tpu.ru/archive/article/view/1425image processingacoustic emissiondigital image correlationstrain gaugingfatigue |
| spellingShingle | Sergey Panin Anton Byakov Pavel Lyubutin Ramasubbu Sunder Viktor Grenke Igor Shakirov Oleg Bashkov Test bench for fatigue failure investigation by combination of acoustic emission, surface strain mapping and tensometry Известия Томского политехнического университета: Инжиниринг георесурсов image processing acoustic emission digital image correlation strain gauging fatigue |
| title | Test bench for fatigue failure investigation by combination of acoustic emission, surface strain mapping and tensometry |
| title_full | Test bench for fatigue failure investigation by combination of acoustic emission, surface strain mapping and tensometry |
| title_fullStr | Test bench for fatigue failure investigation by combination of acoustic emission, surface strain mapping and tensometry |
| title_full_unstemmed | Test bench for fatigue failure investigation by combination of acoustic emission, surface strain mapping and tensometry |
| title_short | Test bench for fatigue failure investigation by combination of acoustic emission, surface strain mapping and tensometry |
| title_sort | test bench for fatigue failure investigation by combination of acoustic emission surface strain mapping and tensometry |
| topic | image processing acoustic emission digital image correlation strain gauging fatigue |
| url | http://izvestiya-tpu.ru/archive/article/view/1425 |
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