{"id":1925,"date":"2021-01-16T20:44:14","date_gmt":"2021-01-16T18:44:14","guid":{"rendered":"http:\/\/journals.khnu.km.ua\/vestnik\/?p=1925"},"modified":"2021-04-22T13:02:10","modified_gmt":"2021-04-22T10:02:10","slug":"%d0%b5%d0%ba%d1%81%d0%bf%d0%b5%d1%80%d0%b8%d0%bc%d0%b5%d0%bd%d1%82%d0%b0%d0%bb%d1%8c%d0%bd%d0%b5-%d0%b4%d0%be%d1%81%d0%bb%d1%96%d0%b4%d0%b6%d0%b5%d0%bd%d0%bd%d1%8f-%d0%b2%d0%bf%d0%bb%d0%b8%d0%b2%d1%83","status":"publish","type":"post","link":"https:\/\/journals.khnu.km.ua\/vestnik\/?p=1925","title":{"rendered":"\u0415\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u0435 \u0434\u043e\u0441\u043b\u0456\u0434\u0436\u0435\u043d\u043d\u044f \u0432\u043f\u043b\u0438\u0432\u0443 \u043d\u0430\u043f\u0440\u0430\u0446\u044e\u0432\u0430\u043d\u043d\u044f \u043d\u0430 \u0442\u0440\u0456\u0449\u0438\u043d\u043e\u0441\u0442\u0456\u0439\u043a\u0456\u0441\u0442\u044c \u0441\u0442\u0430\u043b\u0435\u0439 \u043f\u043e\u0440\u0442\u0430\u043b\u044c\u043d\u0438\u0445 \u043a\u0440\u0430\u043d\u0456\u0432"},"content":{"rendered":"

\u0415\u041a\u0421\u041f\u0415\u0420\u0418\u041c\u0415\u041d\u0422\u0410\u041b\u042c\u041d\u0415 \u0414\u041e\u0421\u041b\u0406\u0414\u0416\u0415\u041d\u041d\u042f \u0412\u041f\u041b\u0418\u0412\u0423 \u041d\u0410\u041f\u0420\u0410\u0426\u042e\u0412\u0410\u041d\u041d\u042f \u041d\u0410 \u0422\u0420\u0406\u0429\u0418\u041d\u041e\u0421\u0422\u0406\u0419\u041a\u0406\u0421\u0422\u042c \u0421\u0422\u0410\u041b\u0415\u0419 \u041f\u041e\u0420\u0422\u0410\u041b\u042c\u041d\u0418\u0425 \u041a\u0420\u0410\u041d\u0406\u0412<\/p>\n

AN EXPERIMENTAL STUDY OF THE IMPACT OF AGE ON THE CRACK RESISTANCE OF THE\u00a0 PORTAL CRANES<\/p>\n

<\/a> \u0421\u0442\u043e\u0440\u0456\u043d\u043a\u0438:16-19. \u041d\u043e\u043c\u0435\u0440: \u21166, 2019 (279)<\/strong>
\n\u0410\u0432\u0442\u043e\u0440\u0438: <\/strong>
\n\u041e.\u041e.\u041d\u0415\u041c\u0427\u0423\u041a,\u00a0 \u0412.\u0412. \u0421\u0422\u0420\u0415\u041b\u042c\u0411\u0406\u0426\u042c\u041a\u0418\u0419
\n\u041e\u0434\u0435\u0441\u044c\u043a\u0438\u0439 \u043d\u0430\u0446\u0456\u043e\u043d\u0430\u043b\u044c\u043d\u0438\u0439 \u043c\u043e\u0440\u0441\u044c\u043a\u0438\u0439 \u0443\u043d\u0456\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442,\u00a0\u00a0 \u043c. \u041e\u0434\u0435\u0441\u0430.
\nO.O. NEMMCHUK, V.V.STRELBITSKIY
\nOdessa National Maritime University, Odessa.
\nDOI:<\/strong> https:\/\/www.doi.org\/10.31891\/2307-5732-2019-279-6-16-19<\/a>
\n\u0420\u0435\u0446\u0435\u043d\u0437\u0456\u044f\/Peer review :<\/strong> 08.12.2019 \u0440.
\n\u041d\u0430\u0434\u0440\u0443\u043a\u043e\u0432\u0430\u043d\u0430\/Printed :<\/strong> 22.01.2020 \u0440.<\/p>\n

\u0410\u043d\u043e\u0442\u0430\u0446\u0456\u044f \u043c\u043e\u0432\u043e\u044e \u043e\u0440\u0438\u0433\u0456\u043d\u0430\u043b\u0443<\/strong><\/p>\n

\u041e\u0431\u2019\u0454\u043a\u0442\u043e\u043c \u0434\u043e\u0441\u043b\u0456\u0434\u0436\u0435\u043d\u043d\u044f \u0454 \u043f\u043e\u0440\u0442\u0430\u043b\u044c\u043d\u0456 \u043a\u0440\u0430\u043d\u0438, \u043a\u043e\u0442\u0440\u0456 \u0432\u0456\u0434\u043f\u0440\u0430\u0446\u044e\u0432\u0430\u043b\u0438 \u043d\u043e\u0440\u043c\u0430\u0442\u0438\u0432\u043d\u0438\u0439 \u0442\u0435\u0440\u043c\u0456\u043d \u0442\u0430 \u0435\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0443\u044e\u0442\u044c\u0441\u044f \u0432\u00a0 \u0440\u0456\u0447\u043a\u043e\u0432\u0438\u0445 \u043f\u043e\u0440\u0442\u0430\u0445.
\n\u041f\u043e\u043d\u0430\u0434\u043d\u043e\u0440\u043c\u043e\u0432\u0430 \u0442\u0430 \u0442\u0440\u0438\u0432\u0430\u043b\u0430\u00a0 \u0457\u0445 \u0435\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0456\u044f \u0432 \u0440\u0435\u0436\u0438\u043c\u0456 \u0456\u043d\u0442\u0435\u043d\u0441\u0438\u0432\u043d\u043e\u0433\u043e \u0446\u0438\u043a\u043b\u0456\u0447\u043d\u043e\u0433\u043e \u043d\u0430\u0432\u0430\u043d\u0442\u0430\u0436\u0435\u043d\u043d\u044f \u0442\u0430 \u0432 \u0441\u0443\u043a\u0443\u043f\u043d\u043e\u0441\u0442\u0456 \u0437\u0456 \u0437\u043c\u0456\u043d\u043e\u044e\u00a0\u00a0 \u0444\u0456\u0437\u0438\u043a\u043e-\u043c\u0435\u0445\u0430\u043d\u0456\u0447\u043d\u0438\u0445 \u0432\u043b\u0430\u0441\u0442\u0438\u0432\u043e\u0441\u0442\u0435\u0439 \u0432\u043d\u0430\u0441\u043b\u0456\u0434\u043e\u043a \u043a\u043e\u0440\u043e\u0437\u0456\u0439\u043d\u043e\u0457 \u0434\u0435\u0433\u0440\u0430\u0434\u0430\u0446\u0456\u0457 \u043c\u0435\u0442\u0430\u043b\u0443 \u0437\u0430\u0433\u043e\u0441\u0442\u0440\u044e\u0454 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u0437\u043d\u0438\u0436\u0435\u043d\u043d\u044f \u0457\u0445 \u043f\u0440\u0430\u0446\u0435\u0437\u0434\u0430\u0442\u043d\u043e\u0441\u0442\u0456. \u0417\u0430 \u0443\u043c\u043e\u0432 \u0432\u0456\u0434\u0441\u0443\u0442\u043d\u043e\u0441\u0442\u0456 \u0434\u043e\u0441\u0442\u0430\u0442\u043d\u044c\u043e\u0433\u043e \u0444\u0456\u043d\u0430\u043d\u0441\u0443\u0432\u0430\u043d\u043d\u044f \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u044e \u0437\u0430\u0434\u0430\u0447\u0435\u044e \u0454 \u0432\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u044f \u0440\u0435\u0441\u0443\u0440\u0441\u0443 \u043a\u0440\u0430\u043d\u0456\u0432, \u043a\u043e\u0442\u0440\u0438\u0439 \u0432\u0438\u0437\u043d\u0430\u0447\u0430\u0454\u0442\u044c\u0441\u044f \u043e\u043f\u0456\u0440\u043d\u0456\u0441\u0442\u044e \u0432\u0442\u043e\u043c\u043d\u043e\u0433\u043e \u0440\u0443\u0439\u043d\u0443\u0432\u0430\u043d\u043d\u044f \u043f\u043e\u0440\u0442\u0430\u043b\u044c\u043d\u0438\u0445 \u043a\u0440\u0430\u043d\u0456\u0432.
\n\u041c\u0435\u0442\u043e\u044e \u0440\u043e\u0431\u043e\u0442\u0438 \u0454 \u0432\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u044f \u0432\u043f\u043b\u0438\u0432\u0443\u00a0 \u043d\u0430\u043f\u0440\u0430\u0446\u044e\u0432\u0430\u043d\u043d\u044f \u0432 \u0443\u043c\u043e\u0432\u0430\u0445 \u0430\u0433\u0440\u0435\u0441\u0438\u0432\u043d\u043e\u0433\u043e \u0441\u0435\u0440\u0435\u0434\u043e\u0432\u0438\u0449\u0430 \u043d\u0430 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438 \u0442\u0440\u0456\u0449\u0438\u043d\u043e\u0441\u0442\u0456\u0439\u043a\u043e\u0441\u0442\u0456\u00a0 \u0437\u0440\u0430\u0437\u043a\u0456\u0432 \u043c\u0435\u0442\u0430\u043b\u043e\u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0456\u0439 \u043f\u043e\u0440\u0442\u0430\u043b\u044c\u043d\u0438\u0445 \u043a\u0440\u0430\u043d\u0456\u0432.
\n\u0414\u043b\u044f \u0434\u043e\u0441\u043b\u0456\u0434\u0436\u0435\u043d\u044c \u0431\u0443\u043b\u0438 \u0432\u0438\u043a\u043e\u0440\u0438\u0441\u0442\u0430\u043d\u0456 \u043f\u043b\u043e\u0441\u043a\u0456 \u0437\u0440\u0430\u0437\u043a\u0438, \u0432\u0438\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u0456 \u0437 \u0441\u0442\u0430\u043b\u0456 St38b2, \u043a\u043e\u0442\u0440\u0456 \u0432\u0438\u0440\u0456\u0437\u0430\u043d\u0456\u00a0 \u0437 \u043d\u0438\u0436\u043d\u044c\u043e\u0457\u00a0 \u0442\u0430 \u0437\u0430\u0434\u043d\u044c\u043e\u0457 \u043f\u043e\u043b\u0438\u0446\u044c \u0445\u043e\u0431\u043e\u0442\u0430, \u0430 \u0442\u0430\u043a\u043e\u0436 \u0441\u0442\u0440\u0456\u043b\u0438 \u043f\u043e\u0440\u0442\u0430\u043b\u044c\u043d\u0438\u0445 \u043a\u0440\u0430\u043d\u0456\u0432 \u0442\u0438\u043f\u0443 \u00ab\u0410\u043b\u044c\u0431\u0430\u0442\u0440\u043e\u0441\u00bb, \u0449\u043e \u043d\u0430\u043f\u0440\u0430\u0446\u044e\u0432\u0430\u043b\u0438 28, 36 \u0456 45 \u0440\u043e\u043a\u0438 \u0432 \u0425\u0435\u0440\u0441\u043e\u043d\u0441\u044c\u043a\u043e\u043c\u0443 \u043f\u043e\u0440\u0442\u0443.\u00a0 \u0415\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u0456 \u0437\u0440\u0430\u0437\u043a\u0438\u00a0 \u043d\u0430\u0432\u0430\u043d\u0442\u0430\u0436\u0443\u0432\u0430\u043b\u0438 \u043f\u043b\u043e\u0441\u043a\u0438\u043c \u0437\u0433\u0438\u043d\u043e\u043c \u043d\u0430 \u0432\u0438\u043f\u0440\u043e\u0431\u0443\u0432\u0430\u043b\u044c\u043d\u0456\u0439 \u043c\u0430\u0448\u0438\u043d\u0456 \u0437 \u0436\u043e\u0440\u0441\u0442\u043a\u0438\u043c \u0442\u0438\u043f\u043e\u043c \u043d\u0430\u0432\u0430\u043d\u0442\u0430\u0436\u0435\u043d\u043d\u044f, \u0447\u0430\u0441\u0442\u043e\u0442\u043e\u044e 16 \u0413\u0446, \u0430\u0441\u0438\u043c\u0435\u0442\u0440\u0456\u0454\u044e \u0446\u0438\u043a\u043b\u0443\u00a0 R 0,05.
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\n\u041a\u043b\u044e\u0447\u043e\u0432\u0456 \u0441\u043b\u043e\u0432\u0430:<\/strong> \u043f\u043e\u0440\u0442\u0430\u043b\u044c\u043d\u0438\u0439 \u043a\u0440\u0430\u043d, \u043a\u043e\u0440\u043e\u0437\u0456\u044f, \u0441\u0442\u0430\u043b\u044c St38b2, \u0448\u0432\u0438\u0434\u043a\u0456\u0441\u0442\u044c \u0440\u043e\u0441\u0442\u0443 \u0432\u0442\u043e\u043c\u043d\u043e\u0457 \u00a0\u0442\u0440\u0456\u0449\u0438\u043d\u0438.<\/p>\n

\u0420\u043e\u0437\u0448\u0438\u0440\u0435\u043d\u0430 \u0430\u043d\u043e\u0442\u0430\u0446\u0456\u044f \u0430\u043d\u0433\u043b\u0456\u0439\u0441\u044c\u043a\u043e\u044e \u043c\u043e\u0432\u043e\u044e<\/strong><\/p>\n

The subject of the study are portal cranes, which have fulfilled the regulatory deadline and are operated in river ports.
\nOvertime and their long operation in the mode of intensive cyclic loading and in combination with the change of physical and mechanical properties due to corrosion degradation of the metal exacerbates the problem of reducing their efficiency. In the absence of sufficient funding, the urgent task is to install a cranes resource, which is determined by the fatigue resistance of portal cranes.
\nThe aim of the work is to establish the influence of operating time in an aggressive environment on the fracture toughness characteristics of metal structures of portal cranes.
\nFlat beam specimens with one-sided incision were used for the studies
\nThey are made of sheet low-carbon ferrite-pearlite grade St38b2 steel (similar to St3sp), and are carved from the bottom and back shelves of the trunk, as well as the right wall of the column of portal cranes of the Albatross type, operated for 28, 36 and 45 \u00a0years in the port of Kherson. The number of samples from each element is 10.
\nThe cut-outs of the samples were chosen taking into account the scheme of the acting stresses in the designs of the crane elements.
\nThe flat specimens were loaded with a cantilever bend on a rigid load type test machine with a frequency of 16 Hz, with a cycle asymmetry of 0.05 (close to the sinusoidal shape of the cycle) and an ambient air temperature of 20\u00baC.
\nThe values \u200b\u200bobtained were averaged for each sample group.
\nThe results of the experimental studies show that: 1) absorbs the experience of gantry cranes on the characteristics of the fracture toughness of St38b2 steel structures; 2) the increase of time leads to the intensification of the growth of the crack in the low- and medium-amplitude sections, in particular in the range of values \u200b\u200bK = 12\u2026 30 MPa \u00b7 m1 \/ 2 the velocity increases in 1.5-2 times. However. within the high-amplitude region, the differences between the velocities are insignificant;3) the characteristics of the fracture toughness of the samples of metal structures of gantry cranes with a time of 28, 36 and 45 years have not changed significantly.
\nKeywords:<\/strong> gantry crane, corrosion, St38b2 steel, fatigue crack growth rate.<\/p>\n

References<\/strong><\/p>\n

    \n
  1. Reshenko, I.O. Degradaciya rozrahunkovih metalokonstrukcij portalnih kraniv v umovah trivaloyi nadnormativnoyi ekspluataciyi [Tekst] \/ I.O. Reshenko, Yu.V. Furtatov \/\/ Mashinoznavstvo. \u2013 2011. \u2013 \u2116 9 \u2013 10. \u2013 S. 36 \u2013 40..<\/li>\n
  2. Nemchuk O. O. Osoblivosti diagnostuvannya tehnichnogo stanu stalej portovogo perevantazhuvalnogo obladnannya \/\/ Fiz.-him. mehanika materialiv. \u2013 2017. \u2013 53, \u2116 6. \u2013 S. 116\u2013118.<\/li>\n
  3. Nemchuk O. O. Vpliv ekspluatacijnogo navantazhennya na korozijnu trivkist stali morskogo portalnogo krana \/\/ Fiz.-him. mehanika materialiv. \u2013 2018. \u2013 \u2116 5. \u2013 S. 121\u2013125.<\/li>\n
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    \u0415\u041a\u0421\u041f\u0415\u0420\u0418\u041c\u0415\u041d\u0422\u0410\u041b\u042c\u041d\u0415 \u0414\u041e\u0421\u041b\u0406\u0414\u0416\u0415\u041d\u041d\u042f \u0412\u041f\u041b\u0418\u0412\u0423 \u041d\u0410\u041f\u0420\u0410\u0426\u042e\u0412\u0410\u041d\u041d\u042f \u041d\u0410 \u0422\u0420\u0406\u0429\u0418\u041d\u041e\u0421\u0422\u0406\u0419\u041a\u0406\u0421\u0422\u042c \u0421\u0422\u0410\u041b\u0415\u0419 \u041f\u041e\u0420\u0422\u0410\u041b\u042c\u041d\u0418\u0425 \u041a\u0420\u0410\u041d\u0406\u0412 AN EXPERIMENTAL STUDY OF THE IMPACT OF AGE ON THE CRACK RESISTANCE OF THE\u00a0 PORTAL CRANES \u0421\u0442\u043e\u0440\u0456\u043d\u043a\u0438:16-19. \u041d\u043e\u043c\u0435\u0440: \u21166, 2019 (279) \u0410\u0432\u0442\u043e\u0440\u0438: \u041e.\u041e.\u041d\u0415\u041c\u0427\u0423\u041a,\u00a0 \u0412.\u0412. \u0421\u0422\u0420\u0415\u041b\u042c\u0411\u0406\u0426\u042c\u041a\u0418\u0419 \u041e\u0434\u0435\u0441\u044c\u043a\u0438\u0439 \u043d\u0430\u0446\u0456\u043e\u043d\u0430\u043b\u044c\u043d\u0438\u0439 \u043c\u043e\u0440\u0441\u044c\u043a\u0438\u0439 \u0443\u043d\u0456\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442,\u00a0\u00a0 \u043c. \u041e\u0434\u0435\u0441\u0430. O.O. NEMMCHUK, V.V.STRELBITSKIY Odessa National Maritime University, Odessa. DOI: https:\/\/www.doi.org\/10.31891\/2307-5732-2019-279-6-16-19 \u0420\u0435\u0446\u0435\u043d\u0437\u0456\u044f\/Peer review : 08.12.2019 \u0440. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[19],"tags":[],"_links":{"self":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts\/1925"}],"collection":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1925"}],"version-history":[{"count":3,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts\/1925\/revisions"}],"predecessor-version":[{"id":5969,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts\/1925\/revisions\/5969"}],"wp:attachment":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}