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Critique of Yakov Zeldovich’s “The Theory of Ignition by a Heated Surface”: Self-Ignition of an Infinite Combustible by Heated Bodies 雅科夫-泽尔多维奇的 "受热表面点燃理论 "批判：受热体对无限可燃物的自燃
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-20 DOI: 10.1134/S102833582310004X
A. A. Filippov
{"title":"Critique of Yakov Zeldovich’s “The Theory of Ignition by a Heated Surface”: Self-Ignition of an Infinite Combustible by Heated Bodies","authors":"A. A. Filippov","doi":"10.1134/S102833582310004X","DOIUrl":"10.1134/S102833582310004X","url":null,"abstract":"<p>The basic principles of a thermal explosion had been studied and published by 1980. It seemed that the research was completed, but later it was discovered that Zeldovich’s “ignition condition” does not correlate with the experimental data. “The theory of ignition by a heated surface” is the basis of ignition theory, but, although the calculations are correct, the results obtained are mistakenly attributed to ignition—in reality they describe the spontaneous ignition of an infinite combustible. Our work shows that a thermal explosion of a combustible from a heated body can develop as ignition and self-ignition. The conditions for self-ignition of an infinite combustible by a flat surface and a cylinder are given, as is the likely condition for the ignition of a combustible between parallel walls of different temperatures.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 10","pages":"324 - 327"},"PeriodicalIF":0.6,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139927580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Three-Dimensional Shell Model for Layer-by-Layer Study of the Stress and Strain State of Irregular Conical Sandwich Shells 用于逐层研究不规则锥形三明治壳体应力和应变状态的三维壳体模型
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-20 DOI: 10.1134/S1028335823100014
V. N. Bakulin
{"title":"A Three-Dimensional Shell Model for Layer-by-Layer Study of the Stress and Strain State of Irregular Conical Sandwich Shells","authors":"V. N. Bakulin","doi":"10.1134/S1028335823100014","DOIUrl":"10.1134/S1028335823100014","url":null,"abstract":"<p>A methodology for constructing three-dimensional shell models for the layer-by-layer study of the stress and strain state of irregular sandwich shells, which are increasingly used in practice, is proposed. An original approach is considered for obtaining approximating displacement functions in the finite elements of the core layer, which does not lead to a discontinuity in the generalized displacements on the interfaces with moment skin layers. The development of such models makes it possible to significantly expand the class of problems to be solved and, with the necessary accuracy and degree of detail, for the first time to study the stress and strain state in the general case of irregular sandwich shells in a wide range of variation in the geometric and physical and mechanical characteristics of the layers. The possibilities of the proposed methodology are illustrated by the example of the study of the stress and strain state of conical sandwich shells with rectangular cutouts.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 10","pages":"334 - 339"},"PeriodicalIF":0.6,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139927454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Analytical Relationship between the Coefficients of Added Mass and Thermal Conductivity in a Suspension of Spherical Particles 球形颗粒悬浮液中附加质量系数与导热系数之间的分析关系
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-20 DOI: 10.1134/S1028335823100026
B. V. Boshenyatov
{"title":"The Analytical Relationship between the Coefficients of Added Mass and Thermal Conductivity in a Suspension of Spherical Particles","authors":"B. V. Boshenyatov","doi":"10.1134/S1028335823100026","DOIUrl":"10.1134/S1028335823100026","url":null,"abstract":"<p>An analytical dependence between the dimensionless coefficients of added mass and thermal conductivity was obtained in a suspension of spherical particles. The dependence is confirmed by comparison with the theoretical data of other authors, including at elevated concentrations of dispersed particles, taking into account their hydrodynamic interaction.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 10","pages":"340 - 344"},"PeriodicalIF":0.6,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139927451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Raman Geothermometer for Carbonaceous Chondrites 碳质软玉的拉曼地温仪
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-20 DOI: 10.1134/S1028335823100075
S. A. Voropaev, A. P. Krivenko, N. V. Dushenko
{"title":"A Raman Geothermometer for Carbonaceous Chondrites","authors":"S. A. Voropaev,&nbsp;A. P. Krivenko,&nbsp;N. V. Dushenko","doi":"10.1134/S1028335823100075","DOIUrl":"10.1134/S1028335823100075","url":null,"abstract":"<p>Samples of the Murchison meteorite (carbonaceous chondrite, type CM2) were kept isothermally in a specially designed device at temperatures of 200, 500, and 800°C. After the samples cooled down in an inert helium atmosphere, Raman scattering spectra were taken. An increase in the intensity of the G- and D‑lines of graphite was detected depending on the degree of heating. It is shown that using such a characteristic parameter of these lines as the area ratio, S<sub>D</sub>/S<sub>G</sub>, it is possible to define a geothermometer to determine the maximum temperature of thermal metamorphism of the parent bodies of carbonaceous chondrites. A comparison with the known data for carbonaceous chondrite Allende (CV3), which has experienced a significant thermal metamorphism, is carried out.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 10","pages":"345 - 348"},"PeriodicalIF":0.6,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139927452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bending of an Elastic Plate in a High Pressure Field 弹性板在高压场中的弯曲
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-20 DOI: 10.1134/S1028335823100051
M. A. Ilgamov
{"title":"Bending of an Elastic Plate in a High Pressure Field","authors":"M. A. Ilgamov","doi":"10.1134/S1028335823100051","DOIUrl":"10.1134/S1028335823100051","url":null,"abstract":"<p>The derivation of the equation of static cylindrical bending of a thin plate under the action of pressures on its surface and end edges is given. The reduction over the thickness of the plate is taken into account, the effect of which becomes noticeable at high average pressure. The refined value of the transverse distributed force is used. The dependence of the bending on the average pressure and the rigidity of the supports in the longitudinal direction is considered.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 10","pages":"319 - 323"},"PeriodicalIF":0.6,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139927585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Significance of Retained Austenite in the High Strength and Plasticity of Medium Carbon Q&P Steel 残余奥氏体在中碳 Q&P 钢的高强度和塑性中的意义
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-20 DOI: 10.1134/S1028335823100063
R. V. Mishnev, Yu. I. Borisova,  M. N. Erokhin, S. M. Gaidar, R. O. Kaibyshev
{"title":"The Significance of Retained Austenite in the High Strength and Plasticity of Medium Carbon Q&P Steel","authors":"R. V. Mishnev,&nbsp;Yu. I. Borisova,&nbsp; M. N. Erokhin,&nbsp;S. M. Gaidar,&nbsp;R. O. Kaibyshev","doi":"10.1134/S1028335823100063","DOIUrl":"10.1134/S1028335823100063","url":null,"abstract":"<p>The Fe–0.44%C–1.8%Si–1.3%Mn–0.82%Cr–0.28%Mo steel treated by the quenching–partitioning process showed a product of strength and elongation of 30 GPa % with yield stress of 1350 MPa. Such a combination of high ultimate tensile strength and good ductility is attributed to a high portion of retained austenite (≥20%) transforming to martensite under tension. The high yield stress is provided by carbon supersaturation of austenite and a high dislocation density in this phase.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 10","pages":"349 - 353"},"PeriodicalIF":0.6,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139927579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effective Methods of Synthesis and Optimization of a Holographic Mask 合成和优化全息掩模的有效方法
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-20 DOI: 10.1134/S1028335823100038
V. V. Chernik
{"title":"Effective Methods of Synthesis and Optimization of a Holographic Mask","authors":"V. V. Chernik","doi":"10.1134/S1028335823100038","DOIUrl":"10.1134/S1028335823100038","url":null,"abstract":"<p>Several statements of the problems of synthesis of a holographic mask in the form of optimization problems for quality of holographic images are presented. An effective algorithm for the synthesis of holographic masks based on FFT with the complexity <i>O</i>(<i>N</i>ln<i>N</i>), where <i>N</i> is the number of elements of the depicted object, is described. Based on this algorithm, a scalable software package has been developed and implemented that allows synthesizing holographic masks for various lithography applications, including the production of MEMS, MOEMS, and high-end chips. Experimental results are presented.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 10","pages":"328 - 333"},"PeriodicalIF":0.6,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139927577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Worst Disturbance of an Oscillator with Quadratic-Law Damping by Means of a Force with a Given Integral 通过给定积分的力对具有二次定律阻尼的振荡器的最差干扰
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823080013
N. N. Bolotnik, V. A. Korneev
{"title":"The Worst Disturbance of an Oscillator with Quadratic-Law Damping by Means of a Force with a Given Integral","authors":"N. N. Bolotnik,&nbsp;V. A. Korneev","doi":"10.1134/S1028335823080013","DOIUrl":"10.1134/S1028335823080013","url":null,"abstract":"<p>The worst disturbance problem for an oscillator with quadratic-law damping is stated. The role of the disturbance is played by an external force applied to the oscillator. It is assumed that this force acts in one direction, that the integral of this force with respect to time is given, and that at the initial instant of time the oscillator is resting in the equilibrium position. It is required to find a time history of the disturbing force that maximizes the maximum (with respect to time) of the absolute value of the displacement of the oscillator’s body from the equilibrium position. The worst disturbance from among rectangular pulses under which the disturbing force is constant on the initial time interval and is equal to zero outside of this interval is found and investigated.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 8","pages":"253 - 256"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139751886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prestressed Multilayer Structures from Polymer Composites for Vibration and Noise Control of Aircraft 用于飞机振动和噪音控制的聚合物复合材料预应力多层结构
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823080037
E. V. Karpov, A. Yu. Larichkin, V. N. Goverdovskiy, Yu. I. Brovkina, A. N. Prokhorov
{"title":"Prestressed Multilayer Structures from Polymer Composites for Vibration and Noise Control of Aircraft","authors":"E. V. Karpov,&nbsp;A. Yu. Larichkin,&nbsp;V. N. Goverdovskiy,&nbsp;Yu. I. Brovkina,&nbsp;A. N. Prokhorov","doi":"10.1134/S1028335823080037","DOIUrl":"10.1134/S1028335823080037","url":null,"abstract":"<p>An approach to creating compact and miniature infra- and low-frequency vibration isolation systems based on layered composite elastic elements with adjustable negative and quasi-zero stiffness is presented. New problems of modeling the given parameters of the stiffness and bearing capacity of elements of certain geometry under combined loading have been solved by varying the structure, elastic properties, and arrangement of layers and controlling the local mobility of the binder. The correctness of the approach is based on the results of experimental design and research of system models. This approach can qualitatively change the solution of a number of critical problems in vibroacoustics of aviation and other advanced engineering.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 8","pages":"272 - 277"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139752107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Surface Plasmon-Polaritons in the VO2–Dielectric-Metasurface Structure Based on Graphene in an External Magnetic Field 外磁场中基于石墨烯的 VO2 介电金属表面结构中的表面等离子极化子
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-02-15 DOI: 10.1134/S1028335823080074
M. O. Usik, D. A. Kuzmin, I. V. Bychkov,  A. S. Bugaev, V. G. Shavrov
{"title":"Surface Plasmon-Polaritons in the VO2–Dielectric-Metasurface Structure Based on Graphene in an External Magnetic Field","authors":"M. O. Usik,&nbsp;D. A. Kuzmin,&nbsp;I. V. Bychkov,&nbsp; A. S. Bugaev,&nbsp;V. G. Shavrov","doi":"10.1134/S1028335823080074","DOIUrl":"10.1134/S1028335823080074","url":null,"abstract":"<p>The results of study of the behavior of surface plasmon polaritons in the layered structure of a VO<sub>2</sub>‒SiO<sub>2</sub>-graphene-based hyperbolic metasurface under the influence of an external magnetic field before and at the beginning of the phase transition of vanadium dioxide are presented. As a result of calculations, it is shown how the isofrequency contour of surface plasmons changes taking into account the different direction of the external magnetic field. It is also shown how an external magnetic field affects the direction of static magnetization caused by the inverse Faraday effect. This work can offer additional ways to control the behavior of surface plasmons, as well as become the basis for the study of new self-adjusting structures.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 8","pages":"246 - 252"},"PeriodicalIF":0.6,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139751878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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