发布求助
文献互助 智能选刊 最新文献

Moscow University Mechanics Bulletin最新文献

筛选
英文 中文
Measure of Unloading Disproportion in the Theory of Small Elastoplastic Deformations 小弹塑性变形理论中的卸载比例测量法
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2024-08-01 DOI: 10.3103/S0027133024700092
D. V. Georgievskii, N. A. Rautian
{"title":"Measure of Unloading Disproportion in the Theory of Small Elastoplastic Deformations","authors":"D. V. Georgievskii,&nbsp;N. A. Rautian","doi":"10.3103/S0027133024700092","DOIUrl":"10.3103/S0027133024700092","url":null,"abstract":"<p>From the standpoint of the theory of small elastoplastic\u0000deformations, the stress-strain state of the continuous medium\u0000along various unloading trajectories from the state achieved as a\u0000result of a simple active process is analyzed. It is shown that if\u0000the unloading is disproportionate, then the constitutive relations\u0000connecting the deviators of stresses and strains are tensorially\u0000nonlinear, i.e., the unit tensors of these deviators do not\u0000coincide. It is demonstrated that in the Il’yushin\u0000five-dimensional deviatoric space there exists only one full\u0000unloading point, and it belongs to the line segment of the\u0000preceding active loading. A measure of the nonproportionality of\u0000the unloading is introduced, characterizing the degree of\u0000deviation of the path of the passive deformation process from the\u0000previously mentioned line segment. This measure is calculated for\u0000two piece-linear unloadings using the example of a constant\u0000annular tube subject to the simultaneous action of <span>((rtheta))</span>-torsion and axial <span>((rz))</span>-shear.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"79 2","pages":"69 - 73"},"PeriodicalIF":0.3,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882553","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
Application of the Reduced and Selected Integration Method in Problems of Micropolar Elasticity Theory 还原和选择积分法在微弹性理论问题中的应用
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2024-05-13 DOI: 10.3103/S002713302470002X
A. V. Romanov
{"title":"Application of the Reduced and Selected Integration Method in Problems of Micropolar Elasticity Theory","authors":"A. V. Romanov","doi":"10.3103/S002713302470002X","DOIUrl":"10.3103/S002713302470002X","url":null,"abstract":"<p>In this paper, a variational principle of Lagrange, the Ritz method, and piecewise polynomial shape functions of brick family ‘‘linear’’ element are used to obtain reduced and selective integration techniques in a form of the tensor-block stiffness matrices to prevent the locking effect for nearly incompressible, isotropic, and centrally symmetric material of the micropolar theory of elasticity.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"79 1","pages":"1 - 5"},"PeriodicalIF":0.3,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929900","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
Controlled Transition in a Modified Model of Biomass Dynamics of Root Hemiparasitic Plants 根系半寄生植物生物量动态修正模型中的受控转变
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2024-05-13 DOI: 10.3103/S0027133024700018
L. Cruzado Lima, V. V. Aleksandrov, C. Netzahualcoyotl Bautista, O. V. Aleksandrova
{"title":"Controlled Transition in a Modified Model of Biomass Dynamics of Root Hemiparasitic Plants","authors":"L. Cruzado Lima,&nbsp;V. V. Aleksandrov,&nbsp;C. Netzahualcoyotl Bautista,&nbsp;O. V. Aleksandrova","doi":"10.3103/S0027133024700018","DOIUrl":"10.3103/S0027133024700018","url":null,"abstract":"<p>This paper shows the possibility of solving the problem of the transition between periodic and point attractors in the bistable Rosenzweig–MacArthur model with modifications for the dynamics of root hemiparasitic plants and their hosts.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"79 1","pages":"6 - 11"},"PeriodicalIF":0.3,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929960","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
Linear Mathematical Model of Relation between Extraocular Muscles and Vestibular System 眼外肌与前庭系统关系的线性数学模型
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2024-05-13 DOI: 10.3103/S0027133024700031
Ya. Yu. Minyailo, A. P. Kruchinina
{"title":"Linear Mathematical Model of Relation between Extraocular Muscles and Vestibular System","authors":"Ya. Yu. Minyailo,&nbsp;A. P. Kruchinina","doi":"10.3103/S0027133024700031","DOIUrl":"10.3103/S0027133024700031","url":null,"abstract":"<p>The article presents a three-dimensional linear model of the vestibulo-ocular reflex in darkness. The model is based on established relationships between the vestibular system and the extraocular muscles. The effectiveness of the model is evaluated through comparison with experimental observations. The model successfully reproduces realistic patterns of slow-phase vestibulo-ocular nystagmus during head rotations.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"79 1","pages":"12 - 20"},"PeriodicalIF":0.3,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140930171","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
Oscillations of a Semi-Infinite Underground Pipeline under Action of a Seismic Wave 地震波作用下半无限地下管道的振荡
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2024-03-23 DOI: 10.3103/S0027133023060043
S. E. Nosov
{"title":"Oscillations of a Semi-Infinite Underground Pipeline under Action of a Seismic Wave","authors":"S. E. Nosov","doi":"10.3103/S0027133023060043","DOIUrl":"10.3103/S0027133023060043","url":null,"abstract":"<p>An exact analytic solution to the problem of joint nonstationary oscillations of a semi-infinite underground pipeline and elastic soil caused by the propagation of a longitudinal seismic wave along its axis is obtained in the case when the pipeline end is clamped. The emerging stress-strain state for subsonic and supersonic modes of seismic wave propagation is studied. The results of this study can be used to calculate the deformation of oil and gas pipelines under seismic loads.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"78 6","pages":"149 - 155"},"PeriodicalIF":0.3,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140203535","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
Equivalence of Systems of Two-Dimensional Shallow-Water Equations over Horizontal and Sloping Bottom 水平底和倾斜底二维浅水方程系统的等价性
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2024-03-23 DOI: 10.3103/S002713302306002X
A. V. Aksenov
{"title":"Equivalence of Systems of Two-Dimensional Shallow-Water Equations over Horizontal and Sloping Bottom","authors":"A. V. Aksenov","doi":"10.3103/S002713302306002X","DOIUrl":"10.3103/S002713302306002X","url":null,"abstract":"<p>A point transformation determining the equivalence of systems of equations of two-dimensional shallow water over horizontal and sloping bottoms is obtained. The symmetries of these systems of equations are found.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"78 6","pages":"156 - 158"},"PeriodicalIF":0.3,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140203462","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
Traveling Wave Solutions to Equations of Two-Velocity Deep Bed Filtration 双速深床过滤方程的行波解决方案
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2024-03-23 DOI: 10.3103/S0027133023060018
N. E. Leontiev, K. Taurbaeva
{"title":"Traveling Wave Solutions to Equations of Two-Velocity Deep Bed Filtration","authors":"N. E. Leontiev,&nbsp;K. Taurbaeva","doi":"10.3103/S0027133023060018","DOIUrl":"10.3103/S0027133023060018","url":null,"abstract":"<p>Traveling wave solutions to the deep bed filtration system are constructed for a model with different velocities of a carrier fluid and suspended particles. The solution in quadratures is obtained when the velocity of the carrier fluid and that of the particles differ by a concentration-dependent factor. For some special cases, the physically realizable domains are found in the space of governing parameters. The solutions that may be interpreted as a clogging wave structure are presented.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"78 6","pages":"159 - 164"},"PeriodicalIF":0.3,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140203456","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
Testing the Isotropy Postulate at Deformation of V95 Aluminum Alloy along Two-Link Polygonal-Chain Trajectories 测试 V95 铝合金沿两链多边形链轨迹变形时的各向同性假设
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2023-12-21 DOI: 10.3103/S0027133023050059
V. G. Zubchaninov, V. I. Gultyaev, A. A. Alekseev, I. A. Savrasov
{"title":"Testing the Isotropy Postulate at Deformation of V95 Aluminum Alloy along Two-Link Polygonal-Chain Trajectories","authors":"V. G. Zubchaninov,&nbsp;V. I. Gultyaev,&nbsp;A. A. Alekseev,&nbsp;I. A. Savrasov","doi":"10.3103/S0027133023050059","DOIUrl":"10.3103/S0027133023050059","url":null,"abstract":"<p>This article considers a series of three experiments on the elastoplastic deformation of the V95 alloy, which is sensitive to the type of stress state. Experimental studies were carried out on a CL-EVM (complex loading) test machine on thin-walled tubular specimens during their deformation along two-link strain trajectories with 90 degree break angles. Experimental studies were carried out in the deviatoric plane <span>(text{E}_{1}-text{E}_{3})</span> with simultaneous combined action of axial force and torque on tubular specimens (<span>(P-M)</span> experiments). The scalar and vector properties of the V95 aluminum alloy are studied. It is found that, for the implemented complex strain trajectories in the form of two-link polygonal chains for the V95 material, the isotropy postulate is not fulfilled accurately enough in terms of scalar and vector properties.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"78 5","pages":"128 - 133"},"PeriodicalIF":0.3,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139027225","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
Peculiarities of Behavior of Simplest Models of Nonlinear Elasticity Constructed Based on New Holonomic Tensor Measures 基于新整体张量构建的非线性弹性最简单模型的行为特征
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2023-12-21 DOI: 10.3103/S0027133023050047
E. S. Klimov, G. L. Brovko
{"title":"Peculiarities of Behavior of Simplest Models of Nonlinear Elasticity Constructed Based on New Holonomic Tensor Measures","authors":"E. S. Klimov,&nbsp;G. L. Brovko","doi":"10.3103/S0027133023050047","DOIUrl":"10.3103/S0027133023050047","url":null,"abstract":"<p>We consider new holonomic tensor measures of strain and stresses and build nonlinear elasticity models for which the problems of stretching of a thin wide plate and uniaxial stretching of a rod from incompressible materials are solved. These models are congruent with classical ones when deformation is small, and they essentially demonstrate various properties at large deformations.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"78 5","pages":"119 - 127"},"PeriodicalIF":0.3,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139027062","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
Limit Reachability Region for Special Form of Third-Order Linear Oscillating System 三阶线性振荡系统特殊形式的极限可达性区域
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2023-12-21 DOI: 10.3103/S0027133023050035
D. I. Bugrov
{"title":"Limit Reachability Region for Special Form of Third-Order Linear Oscillating System","authors":"D. I. Bugrov","doi":"10.3103/S0027133023050035","DOIUrl":"10.3103/S0027133023050035","url":null,"abstract":"<p>The problem under consideration is to find periodic trajectories lying on the boundary of the limit reachability region of a linear time-invariant third-order system with one controlling action bounded in absolute value. It is assumed that the characteristic equation of a homogeneous system has one negative real root and two complex conjugate roots, the real parts of all three roots are the same. The results make it possible to construct the boundary of the limit reachability region (for an infinitely long control time) in the form of analytical expressions on the system parameters.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"78 5","pages":"143 - 148"},"PeriodicalIF":0.3,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139027071","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信