Diagnostics, Resource and Mechanics of materials and structures最新文献

Exact solutions for the description of nonuniform unidirectional flows of magnetic fluids in the Lin–Sidorov–Aristov class 描述林-西多罗夫-阿里斯托夫类磁性流体非均匀单向流动的精确解

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2023-10-01 DOI: 10.17804/2410-9908.2023.5.039-052

L. Goruleva, E. Prosviryakov

引用次数: 0

Finite element simulation of frictional surface hardening by a rotary tool during the hardening of the faces of fixation holes for washers 垫圈固定孔表面硬化过程中旋转工具摩擦表面硬化的有限元模拟

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2023-10-01 DOI: 10.17804/2410-9908.2023.5.053-068

G. Mukanov, V. P. Kuznetsov, V. P. Shveikin, I. Kamantsev

{"title":"Finite element simulation of frictional surface hardening by a rotary tool during the hardening of the faces of fixation holes for washers","authors":"G. Mukanov, V. P. Kuznetsov, V. P. Shveikin, I. Kamantsev","doi":"10.17804/2410-9908.2023.5.053-068","DOIUrl":"https://doi.org/10.17804/2410-9908.2023.5.053-068","url":null,"abstract":"The paper discusses a methodology for simulating friction stir processing in order to determine the process parameters and to provide surface hardening for flanges with a cavity. In accordance with the developed methodology presented by the results of literature analysis, it describes a computational computer model developed in Ansys Mechanical and based on the finite element method. The thermophysical properties of the material under study and the tool material, which are taken into account in the FEM simulation of the processes, are presented as dependent on temperature. By comparison with experimental research, the simulation results are verified in terms of a number of parameters, such as the depth of the hardened layer and the diameter of the surface area of the faces of holes for bolted joints. The results of measuring the microhardness of the hardened layers of the AISI 420 steel are presented, and their dependence on the depth of the hardened layer is determined. Numerical simulation is used to compute the values of the geometrical parameters of the areas subjected to surface hardening by friction stir processing with the variation of the process parameter, namely tool rotation speed, the force acting along the normal to the surface being processed, and the friction coefficient. The numerical simulation gives results on the thermal state of the specimen, particularly, maximum temperatures in the contact zone, as well as temperature and time dependences.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139329217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A model of describing creep strains and porosity evolution for a hollow cylinder affected by internal gas pressure 受内部气体压力影响的空心圆柱体蠕变应变和孔隙率演变模型

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2023-10-01 DOI: 10.17804/2410-9908.2023.5.006-014

V. V. Nazarov

引用次数: 0

Studying the plastic deformability of a Ni–Fe–Cr–Ti–B–C composite 研究 Ni-Fe-Cr-Ti-B-C 复合材料的塑性变形能力

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2023-10-01 DOI: 10.17804/2410-9908.2023.5.015-030

N. B. Pugacheva, D. Vichuzhanin, Т. М. Bykova, I. Kamantsev

{"title":"Studying the plastic deformability of a Ni–Fe–Cr–Ti–B–C composite","authors":"N. B. Pugacheva, D. Vichuzhanin, Т. М. Bykova, I. Kamantsev","doi":"10.17804/2410-9908.2023.5.015-030","DOIUrl":"https://doi.org/10.17804/2410-9908.2023.5.015-030","url":null,"abstract":"The paper studies changes in the structural state of a Ni–Fe–Cr–Ti–B–C composite after hot plastic deformation. The matrix of the composite consists of a mechanical mixture of two solid solutions: austenite and ferrite. Titanium carbide and diboride particles resulting from self-propagating high-temperature synthesis (SHS) are the strengthening phases. Additional strengthening is provided by carbide Cr23C6 and intermetallic Ni3Ti particles formed in austenite during cooling. The constituent with a ferrite matrix, which is a mixture of α-(Cr,Fe) + TiB2 + TiC + Cr23C6, is shown to have the highest ductility. The strongest constituent of the composite is represented by regions with an austenitic matrix and the most abundant TiB2 particles. These regions are characterized by the highest hardness, elastic modulus, elastic recovery Re and wear resistance ratio HIT/E. The hardness of the composite is 58 HRC. For plastic deformation of the composite, it is proposed to perform hot rolling at a heating temperature of 1000 °C under all-round compression. To do this, a composite specimen is pressed into a 10 mm steel shell, with 6 mm steel plates welded on top and from below. True plastic strain ε = 0.6 is achieved under these conditions. EBSD analysis testifies that the deformation is implemented due to dynamic polygonization and recrystallization of the austenitic and ferritic grains of the composite matrix. Dynamic recrystallization prevails in the austenitic grains, whereas dynamic polygonization predominates in the ferritic ones.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139331014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experience in the application of simulation of hot forging in production conditions at the KUMW JSC 库姆瓦股份公司在生产条件下应用热锻模拟的经验

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2023-10-01 DOI: 10.17804/2410-9908.2023.5.069-082

Yu. V. Zamaraeva, L. I. Knysh, E. M. Gaisin

{"title":"Experience in the application of simulation of hot forging in production conditions at the KUMW JSC","authors":"Yu. V. Zamaraeva, L. I. Knysh, E. M. Gaisin","doi":"10.17804/2410-9908.2023.5.069-082","DOIUrl":"https://doi.org/10.17804/2410-9908.2023.5.069-082","url":null,"abstract":"Software for computer simulation of metal forging processes is a reliable tool for designing dies and developing technological processes, which allows one to avoid defects and predict product quality. The paper describes the experience of the KUMW JSC in simulating with the Deform and QForm software packages. The distinctive advantages of the QForm domestic software are exemplified by the forging of a roller disk. Proceeding from the described advantages, the KUMW JSC has selected QForm as effective software to solve the problems of die forging. The paper provides examples of applying this software. QForm is used to evaluate die filling in the forging of an odd-shaped part. Significant under-forming of the part was identified, and the technology was optimized in order to eliminate them. Additionally, by using this software, the shape and weight of a blank for forging a landing gear leg were optimized, and this has resulted in a 15% increase in geometric yield. After only one die-forged item code was modeled and the durability of the tooling was evaluated from stress intensity and displacement, the tooling material was replaced, the critical zone radius was locally increased, and the method for manufacturing die tooling was altered. This increased tool durability by 28%. The presence of the Hartfield postprocessor subroutine in QForm has made it possible to predict the zones of the occurrence of forging defects during the processing of the odd-shaped part and to correct the production scheme in good time. Each simulation example is supported by industrial experiment.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139325980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The technology of arc welding of dissimilar steels 异种钢电弧焊接技术

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2023-10-01 DOI: 10.17804/2410-9908.2023.5.031-038

A. V. Berezovsky, E. Votinova, A. S. Smolentsev

引用次数: 0

Capabilities of eddy current ndt of soldered current-carrying joints in submersible electrical equipment 潜水电气设备载流焊接接头的涡流无损检测能力

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2023-08-01 DOI: 10.17804/2410-9908.2023.4.047-059

L. Kh. Kogan, A. N. Stashkov

引用次数: 0

Estimating complex dielectric permittivity of materials by the frequency dependences of reflection and transmission coefficient magnitudes in the microwave range 利用微波范围内反射系数和透射系数的频率依赖性估计材料的复介电常数

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2023-08-01 DOI: 10.17804/2410-9908.2023.4.060-072

D. V. Perov

{"title":"Estimating complex dielectric permittivity of materials by the frequency dependences of reflection and transmission coefficient magnitudes in the microwave range","authors":"D. V. Perov","doi":"10.17804/2410-9908.2023.4.060-072","DOIUrl":"https://doi.org/10.17804/2410-9908.2023.4.060-072","url":null,"abstract":"Electromagnetic waves of the microwave range are an effective tool for solving problems of non-destructive testing and diagnostics as applied to dielectric, semiconductor, and composite materials, ferrite products. An algorithm is suggested for estimating the complex permittivity of non-magnetic materials by the frequency dependences of reflection and transmission coefficient magnitudes during the interaction of electromagnetic waves in the microwave range with a sample in the form of a plate located in the cross section of a closed rectangular waveguide. Statistical analysis methods are applied to evaluating the errors arising during the application of this algorithm due to imperfect matching of the waveguide measurement path with the receivers and generator of the scalar circuit analyzer. It is shown that the proposed algorithm using the results of measuring reflection and transmission coefficients in a wide frequency range can significantly reduce the influence of frequency-dependent measurement errors on the accuracy of complex permittivity estimation. An additional advantage of the algorithm is that its implementation does not require vector network analyzers, which are very expensive.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135003986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Some problems of heat and mass transfer during the operation of engineering systems in multiphase environments 多相环境下工程系统运行过程中的传热传质问题

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2023-08-01 DOI: 10.17804/2410-9908.2023.4.015-028

M. Yu. Filimonov, N. A. Vaganova

{"title":"Some problems of heat and mass transfer during the operation of engineering systems in multiphase environments","authors":"M. Yu. Filimonov, N. A. Vaganova","doi":"10.17804/2410-9908.2023.4.015-028","DOIUrl":"https://doi.org/10.17804/2410-9908.2023.4.015-028","url":null,"abstract":"Three types of problems related to problems of heat and mass transfer in the soil are considered. The first class of problems deals with the diagnostics of damage of underground pipelines by thermal fields on the soil surface. The second type studies the dynamics of changes in the temperature of a geothermal reservoir depending on the temperature of the water entering this reservoir and the pressure gap between injection and production wells. The third-type problems consider the propagation of non-stationary thermal fields in the soil from operated engineering systems in the permafrost. The main attention is paid to long-term forecasting of the propagation of non-stationary thermal fields in the frozen soil between operating production wells of northern oil and gas fields. In problems of the first two classes, which served as a basis for the development of problems of the third type, water filtration in the soil is considered, and thermal fields propagate in single-phase media. The third-class problems take into account possible phase transitions in the soil when describing non-stationary thermal fields in permafrost soils, leading to Stefan-type problems. Accounting for water migration for the specific third-type problems on the determination of the radius of frozen soil thawing from production wells in northern oil and gas fields does not significantly affect this process since lateral water migration above the groundwater level is minimal. Therefore, only the latent heat of the initial water content is taken into consideration. This paper discusses a mathematical model containing the most significant physical and climatic data affecting the distribution of thermal fields in permafrost rocks and presents the results of numerical calculations.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135002196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrodynamic load on a multi-section heat exchanger 多段换热器的水动力负荷

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2023-08-01 DOI: 10.17804/2410-9908.2023.4.006-014

E. S. Baimetova

引用次数: 0