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Aviation materials and technologies №S1, 2015

Contents

  • A.V. Ilyin, V.Yu. Filin

    Calculated strength assessments in respect of brittle fracture by engineering and critical analysis (ECA)

    13-19
  • K.A. Badikov, A.N. Savkin, A.V. Andronik

    The evaluation of fracture toughness of low-alloy steels by irregular cyclic loading

    20-26
  • A.M. Bolshakov, Ya.M. Andreev

    Fracture analysis of metal structures functioned in the north conditions

    27-31
  • V.A. Ivanov, V.M. Efimov, Z.E. Petrov, A.I. Levin

    Low temperature tests of pipes and the high pressure vessels

    32-36
  • L.V. Morozova, M.R. Orlov

    Research of failure causes of cogwheels in operational process

    37-48
  • V.O. Startsev, A. Yu. Makhonkov, E.A. Kotova

    Mechanical properties and moisture resistance of PCM with damages

    49-55
  • G.M. Kharitonov, N.O. Yakovlev, I.V. Mekalina

    Influence of physical-mechanical properties of organic glasses on the stress in aircraft glazing at aerodynamic heating

    56-60
  • L.E. Bellendir, D.Yu. Vlasov, V.N. Durcheva, I.M. Tsarovtseva

    Biofactor role in corrosion of metal and steel concrete structures of hydraulic engineering constructions

    61-66
Содержание номера
2.

DOI: 10.18577/2071-9140-2015-0-S1-13-19

UDC: 620.165.79

Pages:: 13-19

A.V. Ilyin1, V.Yu. Filin1

[1] National Research Center «Kurchatov Institute» Federal State Unitary Enterprise «Central Research Institute of Structural Materials «Prometey»

Calculated strength assessments in respect of brittle fracture by engineering and critical analysis (ECA)

Strength assessments in respect of brittle fracture prevention for critical structures are essential, especially when new hull and welding materials and unconventional design solutions are used. However the procedures for such calculations contain a lot of inaccuracies as well as a limited applicability. A number of features such as absence of post weld heat treatment, significant structural heterogeneity of welded joints require the development of scientifically substantiated calculation procedures. In this paper we propose guidelines for such assessments based on experimental data collected by the authors and theoretical developments.

Keywords: welded structures, engineering and critical assessment (ЕСА), test methods, NDT

Reference List

    1. DNV-OS-F101. Submarine Pipeline Systems. October, 2013.

    2. DNV-RP-F108. Fracture control for pipeline installation methods introducing cyclic plastic strain. January, 2006.

    3. BS 7910. Guide to methods for assessing the acceptability of flaws in metallic structures. British standard. 2005. 297 p.

    4. Broek D. Osnovy mehaniki razrusheniya [Fracture mechanics bases]: Per. s angl. M.: VSh. 1980. 368 s.

    5. Nott Dzh.F. Osnovy mehaniki razrusheniya [Fracture mechanics bases]: Per. s angl. M.: Metallurgiya. 1978. 256 s.

    6. Ilin A.V., Filin V.Ju. Problemy ispolzovaniya raschetnyh procedur ESA («inzhenernogo kriticheskogo analiza») dlya opredeleniya dopustimyh razmerov defekta v hode stroitelstva morskih podvodnyh truboprovodov [Problems of use of the ESA rated procedures («the engineering critical analysis») for determination of the admissible extent of defect in the process of construction of offshore subsea pipelines] //Opasnye gruzy i kontejnery. 2014. №1–2. S. 56–69.

    7. Pravila klassifikacii i postrojki morskih truboprovodov [Ruled classifications and constructions of offshore pipelines]. Rossijskij morskoj registr sudohodstva. 2012. 283 s.

    8. Rukovodstvo po tehnicheskomu nabljudeniju za postrojkoj i jekspluataciej morskih podvodnyh truboprovodov [Guide to technical observation of construction and operation of offshore subsea pipelines]. Rossijskij morskoj registr sudohodstva. 2009. 64 s.

    9. ISO 15653–2010. Metallic materials – Method of test for the determination of quasistatic fracture toughness of welds. 46 p.

    10. Ilin A.V., Gusev M.A. Novye metodiki issledovaniya soprotivleniya razrusheniyu metalla trub dlya magistralnyh gazoprovodov [New techniques of research of failure resistance of metal of pipes for the main gas pipelines] //Chernaya metallurgiya. 2013. №6 (1362). S. 47–59.

    11. Odd M. Akselsen, Erling Østby and Bård Nyhus. Low Temperature Fracture Toughness of X80 Girth Welds /Proceedings of the Twenty-second (2012) International Offshore and Polar Engineering Conference. Rhodes. 2012.

    12. Ilin A.V., Filin V.Yu. Primenenie raschetnyh ocenok prochnosti s ispolzovaniem mehaniki razrusheniya dlya svarnyh konstrukcij glubokovodnoj tehniki [Application of rated estimates of durability with fracture mechanics use for welded designs of deep-water equipment] //Deformaciya i razrushenie materialov. 2012. №2. S. 9–15.

    13. Ilyin A.V., Filin V.Yu. The Interrelation of Local and Energy Criteria of Unstable Brittle Fracture for Low-Alloyed Cold Resistant Steels /In: 19th European conference on fracture. Fracture Mechanics for Durability, Reliability and Safety. Kazan. Proceeding №418.

    14. Surinovich V., Trofimov E., Vasilev A. O tehnologicheskoj neobhodimosti i vozmozhnosti obespecheniya dlitelnoj i bezopasnoj ekspluatacii stalnyh neftegazoprovodov (na primere OAO «Gazprom») [About technological need and possibility of ensuring long and safe operation of steel oil and gas pipelines (on JSC «Gazprom» example)] //Gazovyj biznes. 2010. №3–4. S. 102–103.

    15. Ilin A.V., Vasilev A.K., Glibenko O.V., Sadkin K.E., Filin V.Yu. Stendovye ispytaniya novyh trub dlya magistralnyh truboprovodov [Stand tests of new pipes for main pipelines] //Himicheskoe i neftegazovoe mashinostroenie. 2011. №10. S. 16–19.

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3.

DOI: 10.18577/2071-9140-2015-0-S1-20-26

UDC: 539.431:669.15

Pages:: 20-26

K.A. Badikov1, A.N. Savkin1, A.V. Andronik1

[1] Federal state budgetary educational institution of higher professional education «Volgograd state technical university»

The evaluation of fracture toughness of low-alloy steels by irregular cyclic loading

Estimation results of fatigue crack propagation under random external loading which was applied using servohydraulic test machine with automatic control are represented. It is shown that crack growth kinetics depends on character of random external loading. Criterial parameters to describe crack process are discussed. Comparative analysis of crack growth durability through «cycle-by-cycle» calculation method is presented using various criterial parameters and experimental results.

Keywords: fatigue crack growth kinetics, block and random loading, random loading character

Reference List

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    2. Savkin A.N., Bagmutov V.P. Prognozirovanie ustalostnoj dolgovechnosti vysokonagruzhennyh konstrukcij [Forecasting of fatigue life of the high-loaded designs]. Volgograd: VolgGTU. 2013. 364 s.

    3. Mehanika razrushenija i prochnost materialov [Fracture mechanics and durability of materials]: Spravochnoe posobie v 4-h t. T. 1. /Pod obshh. red. V.V. Panasyuka. Kiev: Naukova Dumka. 1998. 486 s.

    4. Terentev V.F. Mehanizm zarozhdeniya ustalostnyh treshhin v vysokoprochnyh stalyah pri gigaciklovoj ustalosti [The mechanism of origin of fatigue cracks in high-strength stalyakh at gigacyclic fatigue] /V sb. trudov Mezhdunarodnogo kollokviuma «Mehanicheskaya ustalost metallov–2006». Ternopol. 2006. S. 135–140.

    5. Maksimovie S. Fatique Life Analusis of Aircraft Structural Conponents //Scientific-Technical Review. 2005. V. LV. №1. P. 15–21.

    6. Nesterenko G.I. Ustalost i zhivuchest konstrukcij starejushhih samoletov [Fatigue and survivability of designs of growing old airplanes] //Trudy TsAGI. 1998. Vyp. 2631. S. 67–72.

    7. Heyvud R.B. Proektirovanie s uchetom ustalosti [Design taking into account fatigue]. M.: Mashinostroenie. 1969. 504 s.

    8. Scorupa M. Load interaction effects during fatigue crack growth under. Part I: Empirical trends //Fatique Fract. Engineer. Matem. Struct. 1998. V. 2. P. 987–1006.

    9. Scorupa M. Load interaction effects during fatigue crack growth under variable amplitude loading – a literature review. Part II: qualitative interpretation //Fatigue Fract., Rng., Mater., Struct. 1999. V. 22. P. 905–927.

    10. Kihl D.P. Stochastic fatigue concepts in wеlded surface scup structures. Departamental Report SSPD-90-173-25, US Navy: David Taylor Research Center, Beteshda, MD 200084-5000. 1999.

    11. Agerskov H. Fatigue in steel structures under random loading //Journal of Constructional Steel Research. 2000. V. 53. P. 283–305.

    12. Barsom J.M. Fatigue crack growth under variable amplitude loading in various bridge steels /In: Fatigue Crack Growth under Spectrum Loads. 1976. P. 217–235.

    13. Paris P.C., Erdogan F. A Critical Analysis of Crack Propagation Laws //Journal of Basic Engineering; Transaction, American Society of Mechanical Engineers. Series D. 1963. V. 85. P. 528–534.

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4.

DOI: 10.18577/2071-9140-2015-0-S1-27-31

UDC: 622.691.4

Pages:: 27-31

A.M. Bolshakov1, Ya.M. Andreev1

[1] Federal state unitary enterprise «Institute of Physical and Technical Problems of the North named after V.P. Larionov»

Fracture analysis of metal structures functioned in the north conditions

In the article an analysis of destructions of reservoirs and long distance pipe lines operated in the conditions of the North is represented. Main causes of failures, dependence of frequency of incidents on temperature of operation of reservoirs operated in the conditions of the North are researched.

Keywords: defect,  failures, destructions, reservoirs, gas pipelines

Reference List

    1. Bolshakov A.M. Analiz razrushenij i defektov v magistralnyh gazoprovodah i rezervuarah Severa [The analysis of destructions and defects in the main gas pipelines and North reservoirs] //Gazovaya promyshlennost. 2010. №5. S. 52–53.

    2. Bolshakov A.M., Andreev Ya.M. Harakter defektov i vidy otkazov rezervuarov, rabotayushhih v usloviyah Severa [Nature of defects and types of failures of the reservoirs working in the conditions of the North] //Gazovaya promyshlennost. 2012. №3. S. 90–92.

    3. Konovalov N.N. Normirovanie defektov i dostovernost nerazrushajushhego kontrolya svarnyh soedinenij [Rationing of defects and reliability of non-destructive testing of welded connections]. M.: NTC «Promyshlennaja bezopasnost». 2006. 111 s.

    4. Bolshakov A.M., Tatarinov L.N. Nadezhnost magistralnyh gazoprovodov posle 30 let ekspluatacii v usloviyah Krajnego Severa [Reliability of the main gas pipelines after 30 years of operation in the conditions of Far North] //Gazovaja promyshlennost'. 2009. №2. S. 28–31.

    5. Bolshakov A.M., Golikov N.I., Syromyatnikova A.S., Alekseev A.A., Litvincev N.M., Tihonov R.P. Razrusheniya i povrezhdeniya pri dlitelnoj ekspluatacii obektov neftyanoj i gazovoj promyshlennosti [Destructions and damages at long operation of objects of the oil and gas industry] //Gazovaya promyshlennost. 2007. №7. S. 89–91.

    6. Dubov A.A. Problemy ocenki resursa stareyushhego oborudovaniya [Problems of assessment of resource of the growing old equipment] //Bezopasnost truda v promyshlennosti. 2002. №12. S. 30–38.

    7. Berezin V.L., Shutov V.E. Prochnost i ustojchivost rezervuarov i truboprovodov [Durability and stability of reservoirs and pipelines]. M.: Nedra. 1973. 200 s.

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5.

DOI: 10.18577/2071-9140-2015-0-S1-32-36

UDC: 621.791.75

Pages:: 32-36

V.A. Ivanov1, V.M. Efimov1, Z.E. Petrov2, A.I. Levin3

[1] Federal state unitary enterprise «Institute of Physical and Technical Problems of the North named after V.P. Larionov»
[2] Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy of the Siberian Branch of the RAS
[3] Yakut Scientific Center of the Siberian Branch of the RAS

Low temperature tests of pipes and the high pressure vessels

Methods of testing of pipes and pressure vessels in conditions of naturally cold climate as well as the results of in situ tests of 6 m long, 1420 mm in diameter X70 steel pipe segments produced at Harzis Pipe Plant, and 1000 mm in inner diameter, 55 mm wall thickness 09KhG2SYuCh steel model vessel are presented. Strain and pressure measurements, notch side opening and wall temperature measurements were conducted during the test. The stages of crack initiation and growth are determined. It is revealed that the base metal and the weld joint zone of the 09KhG2SYuCh steel pressure vessel have identical crack growth resistance at the beginning of stable crack growth.

Keywords: in situ test, fracture, weld, deformation, pressure, temperature, fracture toughness

Reference List

    1. Egorova S.V., Yurchishin A.V., Solina E.N. i dr. Hladostojkaya stal povyshennoj prochnosti 09HG2SYuCh dlya svarnyh sosudov vysokogo davleniya [Cold-resistant steel of the increased durability 09HG2SYuCh for welded vessels of high pressure] //Avtomaticheskaya svarka. 1992. №9–10. S. 37–42.

    2. Pehovich A.I. Osnovy gidroledotermiki [Bases hydra-ice thermic]. L.: Energoatomizdat. 1983. 200 s.

    3. Semenov Ya.S., Fedorov S.P., Gilyazov A.A. Ocenka relaksacionnyh processov pri dvizhenii magistralnoj treshhiny [Assessment of relaktsionny processes at movement of the main crack] //Gazovaya promyshlennost. 2007. №7. S. 63–65.

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6.

DOI: 10.18577/2071-9140-2015-0-S1-37-48

UDC: 620.178.38

Pages:: 37-48

L.V. Morozova1, M.R. Orlov1

[1] Federal state unitary enterprise «All-Russian Scientific-Research Institute of Aviation Materials» of National Research Center «Kurchatov Institute»

Research of failure causes of cogwheels in operational process

Mechanisms of fatigue and static operational failure of cogwheels from steel 20kH3MVF are investigated by methods of optical, scanning electron and confocal laser microscopy. Statistical generalization of the reasons leading to the failure in the process of operation is carried out. Modeling of the mechanism of fatigue failure of cogwheels under dynamic loads with different loading cycle ratio is carried out. It is established that a fatigue crack is initiated in condition of maximum compression stresses.

Keywords: fractography, failure, gear wheel, cogwheel, machining, fatigue failure

Reference List

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    11. Tishaev S.I., Orlov M.R., Kolesnikov V.A. O prirode «bejnitnoj» hrupkosti vtorichnotverdejushhih stalej [About the nature of «bainitic» fragility vtorichnotverdeyushchy staly] //Izvestiya AN SSSR. Metally. 1985. №4. S. 143–149.

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    13. Orlov M.R., Ospennikova O.G., Gromov V.I. Zamedlennoe razrushenie stali 38HN3MA v processe dlitelnoj ekspluatacii [Steel 38HN3MA delayed fracture in the course of long operation] //Vestnik MGTU im. N.E. Baumana. Ser. «Mashinostroenie». 2011. №SP2. S. 5–12.

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    15. Sposob himiko-termicheskoj obrabotki detalej iz konstrukcionnyh stalej [Way of chemical and thermal processing of details from constructional the steel]: pat. 2358019 Ros. Federaciya; zayavl. 23.10.07; opubl. 10.06.09. Byul. №16.

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    17. Erasov V.S., Nuzhnyj G.A. Zhestkij cikl nagruzheniya pri ustalostnyh ispytaniyah [Rigid cycle of loading at fatigue tests] //Aviacionnye materialy i tehnologii. 2011. №4. S. 35–40.

    18. Erasov V.S., Yakovlev N.O., Nuzhnyj G.A. Kvalifikatsionnye ispytaniya i issledovaniya prochnosti aviatsionnyh materialov [Qualification tests and researches of durability of aviation materials] //Aviacionnye materialy i tehnologii. 2012. №S. S. 440–448.

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7.

DOI: 10.18577/2071-9140-2015-0-S1-49-55

UDC: 53.093:67.017

Pages:: 49-55

V.O. Startsev1, A. Yu. Makhonkov2, E.A. Kotova2

[1] Federal state unitary enterprise «All-Russian Scientific-Research Institute of Aviation Materials» of National Research Center «Kurchatov Institute»
[2] Federal state unitary enterprise «All-Russian scientific research institute of aviation materials

Mechanical properties and moisture resistance of PCM with damages

The influence of drop-weight impact on moisture diffusion coefficient, ultimate moisture saturation and compression strength properties of next-generation GFRPs and CFRPs exposed to four different climatic regions was investigated. The moisture transfer properties are more sensitive to the damage induced by drop-weight impact: compression strength is decreased by 5,5% average and moisture diffusion coefficient is decreased by 35 % average.

Keywords: weathering, ultimate compressive strength, drop-weight impact, moisture diffusion

Reference List

    1. Kablov E.N., Startsev O.V., Krotov A.S., Kirillov V.N. Klimaticheskoe starenie kompozicionnyh materialov aviacionnogo naznacheniya. I. Mehanizmy stareniya [Climatic aging of composite materials of aviation assignment. I. Aging mechanisms] //Deformaciya i razrushenie materialov. 2010. №11. S. 19–26.

    2. Kablov E.N., Kirillov V.N., Zhirnov A.D., Startsev O.V., Vapirov Yu.M. Centry dlya klimaticheskih ispytanij aviacionnyh PKM [The centers for climatic tests of aviation PKM] //Aviacionnaya promyshlennost. 2009. №4. S. 36–46. 

    3. Kirillov V.N., Startsev O.V., Efimov V.A. Klimaticheskaya stojkost i povrezhdaemost polimernyh kompozicionnyh materialov, problemy i puti resheniya [Climatic firmness and damageability of polymeric composite materials, problems and solutions] //Aviacionnye materialy i tehnologii. 2012. №S. S. 412–423.

    4. Titareva A.S., Kirillov V.N., Startsev O.V. Povedenie materialov v elementah konstrukcij aviacionnoj tehniki, izgotovlennyh s primeneniem PKM i sistem LKP v usloviyah umerenno teplogo klimata [Behavior of materials in structural components of aeronautical engineering, manufactured using PCM and PC systems under conditions of temperate thermal climate] //Aviacionnye materialy i tehnologii. 2013. №S2. S. 81–85.

    5. Kablov E.N. Innovacionnye razrabotki FGUP «VIAM» GNC RF po realizacii «Strategicheskih napravlenij razvitiya materialov i tehnologij ih pererabotki na period do 2030 goda» [Innovative developments of FSUE «VIAM» SSC of RF on realization of «Strategic directions of the development of materials and technologies of their processing for the period until 2030»] //Aviacionnye materialy i tehnologii. 2015. №1 (34). S. 3–33.

    6. ASTM Standard D7136, Standard Test Method for Measuring the Damage Resistance of a Fiber-Reinforced Polymer Matrix Composite to a Drop-Weight Impact Event. 2005.

    7. ASTM Standard D7137, Standard Test Method for Compressive Residual Strength Properties of Damaged Polymer Matrix Composite Plates. ASTM International, West Conshohocken, PA. 2012.

    8. Berketis K., Tzetzis D. The compression-after-impact strength of woven and non-crimp fabric reinforced composites subjected to long-term water immersion ageing //J. Materials Science. 2010. V. 45. №20. P. 5611–5623.

    9. Imielinska K., Guillaumat L. The effect of water immersion ageing on low-velocity impact behaviour of woven aramid–glass fibre/epoxy composites //Composites Science and Technology. 2004. V. 64. №13–14. P. 2271–2278.

    10. Saito H., Kimpara I. Damage evolution behavior of CFRP laminates under post-impact fatigue with water absorption environment //Composites Science and Technology. 2009. V. 69. №6. P. 847–855.

    11. Aoki Y., Yamada K., Ishikawa T. Effect of hygrothermal condition on compression after impact strength of CFRP laminates //Composites Science and Technology. 2008. V. 68. №6. P. 1376–1383.

    12. Park H., Kong C. A study on low velocity impact damage evaluation and repair technique of small aircraft composite structure //Composites: Part A. 2011. V. 42. №9. P. 1179–1188.

    13. Sokolov I.I., Raskutin A.E. Ugleplastiki i stekloplastiki novogo pokoleniuya [Coal plastics and fibreglasses of new generation] //Trudy VIAM. 2013. №4. St. 09 (viam-works.ru).

    14. Subbotin V.V., Grinev M.A. Opyt primeneniya materialov proizvodstva FGUP «VIAM» i PORCHER v konstrukciyah uzlov i detalej aviacionnyh silovyh ustanovok iz polimernyh kompozicionnyh materialov [Experience of application of materials of production of FSUE «VIAM» and PORCHER in designs of nodes and details of aviation power units from polymeric composite materials] //Novosti materialovedeniya. Nauka i tehnika. 2013. №5. S. 1–7.

    15. Startseva L.T., Panin S.V., Startsev O.V., Krotov A.S. Diffuziya vlagi v stekloplastiki posle ih klimaticheskogo stareniya [Moisture diffusion in fibreglasses after their climatic aging] //Doklady akademii nauk. 2014. T. 456. №3. S. 305–309.

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8.

DOI: 10.18577/2071-9140-2015-0-S1-56-60

UDC: 629.735.33.023.26.015.4.

Pages:: 56-60

G.M. Kharitonov1, N.O. Yakovlev2, I.V. Mekalina2

[1] Open Joint Stock Company «Flight Research Institute named after M.M. Gromov»
[2] Federal state unitary enterprise «All-Russian Scientific-Research Institute of Aviation Materials» of National Research Center «Kurchatov Institute»

Influence of physical-mechanical properties of organic glasses on the stress in aircraft glazing at aerodynamic heating

The influence of physical-mechanical properties of organic glasses, such as the elastic modulus and linear thermal expansion coefficient (LTEC), on the values of stress in aircraft glazing at aerodynamic heating is analyzed. The optimal temperature dependences of elastic modulus and LTEC to minimize the residual and resulting thermal stresses are proposed.

Keywords: aircraft glazing, organic glass, physical-mechanical properties, rubber-like elastic strain

Reference List

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    2. Sentyurin E.G., Mekalina I.V., Trigub T.S., Klimova S.F. Modificirovannye organicheskie stekla dlya perspektivnoj aviacionnoj tehniki [The modified organic glasses for perspective aviation engineering] //Vse materialy. Enciklopedicheskij spravochnik. 2012. №2. S. 2–4.

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    7. Bogatov V.A., Trigub T.S., Mekalina I.V., Ajzatulina M.K. Ocenka ekspluatacionnyh harakteristik novyh teplostojkih organicheskih stekol VOS-1 i VOS-2 [Assessment of utilization properties of new heatresistant organic glasses VOS-1 and VOS-2] //Aviacionnye materialy i tehnologii. 2010. №1. S. 21–26.

    8. Mekalina I.V., Bogatov V.A., Trigub T.S., Sentjurin E.G. Aviacionnye organicheskie stekla [Aviation organic glasses] //Trudy VIAM. 2013. №11. St. 04 (viam-works.ru).

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    10. Yakovlev N.O., Erasov V.S., Sentyurin E.G., Haritonov G.M. Kompleks metodik ocenki fiziko-mehanicheskih harakteristik organicheskih stekol s uchetom vliyaniya vysokoelasticheskoj deformacii [Complex of techniques of assessment of physicomechanical characteristics of organic glasses taking into account high-elastic deformation influence ] //Vse materialy. Enciklopedicheskij spravochnik. 2013. №10. S. 6–11.

    11. Yakovlev N.O., Erasov V.S., Sentyurin E.G., Haritonov G.M. Relaksaciya ostatochnyh napryazhenij v aviacionnyh organicheskih steklah pri poslepoletnoj stoyanke samoleta [Relaxation of residual stresses in aviation organic glasses at postflight parking of airplane] //Aviacionnye materialy i tehnologii. 2012. №2. S. 66–69.

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    13. Yakovlev N.O. Vliyanie vysokoelasticheskoj deformacii na napryazhenno-deformirovannoe sostoyanie aviacionnyh organicheskih stekol [Influence of high-elastic deformation on intense the deformed condition of aviation organic glasses]: Avtoref. dis. … k.t.n. M.: VIAM. 2013. 24 s.

    14. Haritonov G.M., Hitrova O.I., Erasov V.S. i dr. Vliyanie ekspluatacionnyh uslovij nagruzheniya na uprugoplasticheskie harakteristiki aviacionnogo organicheskogo stekla [Influence of operational conditions of loading on elasto-plastic characteristics of aviation organic glass] //Aviacionnaya promyshlennost. 2006. №2. S. 43–48.

    15. Yakovlev N.O. Issledovanie i opisanie relaksacionnogo povedeniya polimernyh materialov (obzor) [Study and description of relaxation behavior of polymers (review)] //Aviacionnye materialy i tehnologii. 2014. №S4. S. 50–54.

    16. Haritonov G.M., Hitrova O.I., Yakovlev N.O., Erasov V.S. Zakonomernosti povedeniya VE deformacij v aviacionnyh steklah iz linejnyh i poperechno sshityh polimerov pri znakoperemennyh nagruzheniyah [Patterns of behavior of VE of deformations in aviation glasses from the linear and cross sewed polymers at sign-variable loadings ] //Aviacionnaya promyshlennost. 2011. №3. S. 28–32.

    17. Yakovlev N.O. Ocenka granic oblasti relaksacionnogo povedeniya organicheskogo stekla na osnove polimetilmetakrilata [Assessment of borders of area of relaxation behavior of organic glass on basis polimetilmetakrilata] //Plasticheskie massy. 2015. №1–2. S. 36–39.

    18. Yakovlev N.O. Relaksacionnoe povedenie organicheskogo stekla na osnove polimetilmetakrilata [Relaxation behavior of organic glass on basis polimetilmetakrilata] //Zavodskaya laboratoriya. Diagnostika materialov. 2015. T. 81. №5. S. 57–60.

    19. Yakovlev N.O., Mekalina I.V., Sentyurin E.G. Osobennosti uprugo-vysokoelasticheskogo deformirovaniya organicheskih stekol linejnoj i redko sshitoj struktur [Features of elastic and high-elastic deformation of organic glasses of the linear and seldom sewed structures] //Materialovedenie. 2015. №3. S. 16–22.

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9.

DOI: 10.18577/2071-9140-2015-0-S1-61-66

UDC: 620.193

Pages:: 61-66

L.E. Bellendir1, D.Yu. Vlasov2, V.N. Durcheva1, I.M. Tsarovtseva1

[1] “B.E. Vedeneev VNIIG”
[2] Saint Petersburg State University

Biofactor role in corrosion of metal and steel concrete structures of hydraulic engineering constructions

The article presents the results of field studies of the influence of biological factors on metal and concrete structures of Miatlinskaya and Cheboksarskaya HPP. Analysis of the selected samples showed a rich species composition of fungi and bacteria related to severe corrosive agents, as well as their influence on the structure of the material. The conclusion has been made about the significant role of microorganisms in changing the structure of materials.

Keywords: metal corrosion, products of metal corrosion, biocorrosion, biodamages, biological factor, microorganisms, hydraulic engineering constructions, metal structures, steel concrete structures

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