Diagnostics, Resource and Mechanics of materials and structures最新文献_第10页

A class of exact solutions with spatial acceleration for the description of viscous incompressible fluid flows in the field of mass forces 质量力场中粘性不可压缩流体流动描述的一类具有空间加速度的精确解

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2021-02-01 DOI: 10.17804/2410-9908.2021.1.006-025

N. Burmasheva, E. Prosviryakov

引用次数: 0

Model representation of an axisymmetric steel-aluminum sample for simulation of a separation test 模拟分离试验用轴对称钢-铝试样的模型表示

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2021-02-01 DOI: 10.17804/2410-9908.2021.1.026-037

D. Kryuchkov, A. Zalazinsky

{"title":"Model representation of an axisymmetric steel-aluminum sample for simulation of a separation test","authors":"D. Kryuchkov, A. Zalazinsky","doi":"10.17804/2410-9908.2021.1.026-037","DOIUrl":"https://doi.org/10.17804/2410-9908.2021.1.026-037","url":null,"abstract":"The object of research is a bimetallic composite material with a thin intermediate layer of aluminum. The aim of the work is to determine the features of the stress-strain state at the interlayer boundaries of a steel-aluminum composite material with a thin layer using the computational exper-iment method and to calculate separation resistance using the energy criterion. The stress-strain state along the boundaries of the joint at delamination is determined from the results of modeling the de-formation of axisymmetric samples made of a steel-aluminum bimetallic composite material with a thin intermediate layer of aluminum. A series of computational experiments with varying the critical rate of elastic energy release under separation conditions, including under the combined influence of low temperatures and static loads, is implemented. The energy criterion is used to evaluate the stress level that leads to the separation of the bimetallic compound. The dependence of the separation re-sistance along the ring contour on the critical rate of elastic energy release, which is variable in the range of 0.1 to 0.5 N/mm, is calculated. It is established that, for the studied variants of the compu-tational experiment, a rigid stress state with a predominance of normal tensile stresses is realized at the place of delamination onset.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85192419","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

Evolution of the structure of annealed hafnium bronze nanostructured by high pressure torsion 高压扭转退火铪青铜纳米结构的演变

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2021-02-01 DOI: 10.17804/2410-9908.2021.1.038-050

A. Stolbovsky, V. Popov, R. Falahutdinov, S. Murzinova

{"title":"Evolution of the structure of annealed hafnium bronze nanostructured by high pressure torsion","authors":"A. Stolbovsky, V. Popov, R. Falahutdinov, S. Murzinova","doi":"10.17804/2410-9908.2021.1.038-050","DOIUrl":"https://doi.org/10.17804/2410-9908.2021.1.038-050","url":null,"abstract":"The effect of severe plastic deformation by 1, 3 and 5 revolutions of high pressure torsion (HPT) on the structure and mechanical properties of low-alloyed hafnium bronze Cu–0.78wt%Hf is studied. In the initial annealed state, hafnium is almost completely bonded into intermetallic com-pounds. It has been found that the structure of all the investigated bronze specimens subjected to HPT is stable and that it remains unchanged after unloading and prolonged ageing at room tempera-ture. It is shown that all the specimens develop a dispersed submicrocrystalline structure gradient along the radius of the disk, with an average crystallite size of 200 nm after 1 revolution to 120 nm after 5 revolutions (at mid-radius). The structure is non-uniform even after 5 revolutions, this being confirmed by microhardness measurements. The high-pressure-torsion behavior of hafnium bronze with Hf bonded into precipitates has much in common with the behavior of pure copper. At the same time, in terms of the stability of the obtained structures at room temperature, the behavior of the alloy under study demonstrates much in common with that of low-alloyed tin bronze.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78128458","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

An exact solution for describing the unidirectional marangoni flow of a viscous incompressible fluid with the navier boundary condition. Temperature field investigation 粘性不可压缩流体一维马兰戈尼流的精确解。温度场调查

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2020-02-01 DOI: 10.17804/2410-9908.2020.1.006-023

N. Burmasheva, E. Prosviryakov

引用次数: 2

THE EFFECT OF DAMAGE AT AN ENSEMBLE OF MICROSTRUCTURE POINTS ON THE MARGIN OF SAFETY IN STRUCTURALLY HETEROGENEOUS MATERIALS 结构非均质材料中微观结构点集合处损伤对安全裕度的影响

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2019-10-25 DOI: 10.17804/2410-9908.2019.5.060-072

S. Volkov

{"title":"THE EFFECT OF DAMAGE AT AN ENSEMBLE OF MICROSTRUCTURE POINTS ON THE MARGIN OF SAFETY IN STRUCTURALLY HETEROGENEOUS MATERIALS","authors":"S. Volkov","doi":"10.17804/2410-9908.2019.5.060-072","DOIUrl":"https://doi.org/10.17804/2410-9908.2019.5.060-072","url":null,"abstract":"Fracture concentration regions are considered in a microstructure under loading. A mathematical model of a micro-heterogeneous medium with random properties of elements is used for the calculations. The initial data in the problem includes the characteristics of the distributions of random elastic moduli and ultimate strengths in the microstructure elements. The microstructure strength condition is a difference between stresses and ultimate strengths for a multitude of points of a given configuration. The probability of stress simultaneously exceeding the ultimate strength in a given set of elements determines the probability of fracture in this ensemble of points and relative damage at the micro level. A multidimensional normal distribution is used to calculate damage. The structure of the correlation matrix of distribution takes into account the kind of the damage concentration region. The relationship between critical microstructure damage and the margin of safety is determined. Examples of calculating the probability of fracture in two, three, and four microstructure elements are given.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77825746","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: 1

COMPARISON OF THE YIELD FUNCTIONS FOR MICROPOLAR MEDIA USING A CYLINDRICAL SAMPLE MODEL 用圆柱形样品模型比较微极介质的屈服函数

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2019-10-25 DOI: 10.17804/2410-9908.2019.5.006-022

K. Frolova, E. Vilchevskaya

引用次数: 0

ANALYSIS OF TWO CREEP RUPTURE MODEL 两种蠕变断裂模型的分析

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2019-10-25 DOI: 10.17804/2410-9908.2019.5.073-080

V. Nazarov

引用次数: 2

AN EXACT SOLUTION TO THE DESCRIPTION OF A UNIDIRECTIONAL MARANGONI FLOW OF A VISCOUS INCOMPRESSIBLE FLUID WITH THE NAVIER BOUNDARY CONDITION. VELOCITY FIELD INVESTIGATION 粘性不可压缩流体一维马兰戈尼流的精确解。速度场调查

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2019-10-25 DOI: 10.17804/2410-9908.2019.5.023-039

N. Burmasheva, E. Prosviryakov

引用次数: 2

EFFECT OF γ→ MARTENSITIC TRANSFORMATION ON THE TRIBOLOGICAL PROPERTIES OF CHROMIUM–MANGANESE AUSTENITIC STEELS γ→马氏体相变对铬锰奥氏体钢摩擦学性能的影响

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2019-10-25 DOI: 10.17804/2410-9908.2019.5.048-059

L. Korshunov, N. L. Chernenko

{"title":"EFFECT OF γ→ MARTENSITIC TRANSFORMATION ON THE TRIBOLOGICAL PROPERTIES OF CHROMIUM–MANGANESE AUSTENITIC STEELS","authors":"L. Korshunov, N. L. Chernenko","doi":"10.17804/2410-9908.2019.5.048-059","DOIUrl":"https://doi.org/10.17804/2410-9908.2019.5.048-059","url":null,"abstract":"The paper studies the effect of ε (hcp) martensite on the structure and tribological properties of chromium-manganese metastable austenitic steels. The effect of TiC carbide particles on the friction coefficient and wear resistance of Cr–Mn austenitic steels is considered. Structural transformations occurring in the surface layers of the steel in the course of frictional processing are studied via methods of metallography, X-ray diffraction and electron microscopy analysis. It has been found that the formation of nanocrystalline hcp martensite in the steels under study decreases considerably their friction coefficient and increases their resistance to adhesive wear in comparison with the cases of the 40Kh25N20 stable austenitic stainless steel and the 12Kh18N9 austenitic stainless steel, the latter being metastable to γ→α martensitic transformation. The presence of 1–4.5 wt % of TiC carbide particles in the structure of the steels increases the friction coefficient of the materials and decreased their wear resistance. The ε phase in chromium-manganese austenitic steels is more capable of strain-induced hardening under friction than the ε phase in iron-manganese alloys. Accumulation of fine TiC particles of in the surface layer of the titanium-alloyed chromiummanganese austenitic steels has been detected.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74322284","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

DESIGN AND PROCESS DESCRIPTION OF WELDED JOINTS IN GENERAL-PURPOSE STRUCTURAL STEELS 通用结构钢焊接接头的设计与工艺说明

Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2019-10-25 DOI: 10.17804/2410-9908.2019.5.040-047

Z. G. Kornilova, G. S. Ammosov

引用次数: 0