Jakub Kõo
Recent Submissions
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Kihilise kasvatamise/kahandamise meetodid jääkpingete määramiseks ortotroopsetes mittehomogeensetes silindrites: rakendus kasvupingete määramiseks puu tüves
(Eesti Maaülikool, 2018)Kihilise kasvatamise/kahandamise meetodid jääkpingete määramiseks mittehomogeensetes ortotroopsetes silindrites pakuvad huvi jääkpingete uurimisel kihilistes komposiitmaterjalides, samuti puidu jääkpingete uurimisel ja ... -
Maaehituse eriala saamislugu : [EPA-s, EPMÜ-s]
(Eesti Põllumajandusülikool, 2001)Artiklis on esitatud maaehituse eriala lühike saamislugu alates aastast 1964, kui tolleaegse Eesti Põllumajanduse Akadeemia ehitusmehaanika kateedri juhataja dots. Nikolai Oll tõstatas ehitus- ja maaparandusalasel ... -
Determination of Residual Stresses in Coatings and Coated Parts: Extended variant with additional information
(Estonian Agricultural University, 1993)The methods of experimental residual stress analysis in coatings available at present are indirect. A distinct deformation parameter of a substrate or a coating should always be measured, from which the values of residual ... -
A problem of thermoelasticity for a free nonhomogeneous plate with temperature variation through thickness :[full text in Russian]
(Киев : Наукова думка, 1979)In the monograph [3] (B.A. Boley and J.H. Weiner. Theory of Thermal Stresses. John Wiley and Sons, Inc., New York, London, 1960) the thermoelastic problem is solved for a homogeneous free plate with temperature variation ... -
On Determination of Residual Stresses in Deposits by Measuring the Bending of a Thin-Walled Substrate in the Form of a Curvilinear Strip
(Copenhagen : Danmarks Tekniske Højskole , Afdelingen for Boerende Konstruktioner, 1990)The paper deals with a perfected theory of determination of initial residual stresses in a deposit by measuring the angular deflection of free end of a substrate in the form of a helical warping strip. Unlike the theory ... -
Study of deformations of thermobimetallic straight strips under heating using the holographic interferomentry method : [full text in Russian]
(Киев : Наукова думка, 1991)The method of interference holography is used to study deformation of plane thermobimetallic springs under uniform variation of temperature. It is established that free springs with thickness/width ration 1/20 and width/length ... -
Ehitusmehaanika kursusetööd : õppevahend maainseneriteaduskonna üliõpilastele
(Eesti Põllumajanduse Akadeemia, 1990)Õppevahendis on toodud kursusetööde juhend ja programmiga ettenähtud nelja töö lähteandmed ning lahendusnäited. Lisades on antud programmid talasõrestiku sõlmede tasakaaluvõrrandite lahendamiseks, siirete arvutamiseks Mohri ... -
Thermoelastic Stresses in Multilayered Plates Under Variable Heating in the Direction of Thickness :[full text in Russian]
(Eesti Põllumajanduse Akadeemia, 1959)Thermoelastic equilibrium of multilayer isotropic plates (Fig. 1) Under variable heating in the thickness direction in considered. Proceedings from the well-known Kirchoff’s hypotheses, it is demonstrated that in the case ... -
Calculation of Eigenstresses in Electrodeposits by Deformation of a Thin Plate Cathode :[full text in Russian]
(Eesti Põllumajanduse Akadeemia, 1959)Draw on the analogy between a libre thermal strain in a elastic body and a libre eigenstrain in a electrodeposit, for calculation of eigenstress (residual stress) in the superficial layer of a galvanic coating, formula (4) ... -
Algparameetrite meetodi ühest esitusvariandist tugevusõpetuses
(Eesti Põllumajanduse Akadeemia, 1990)Tavaliselt esitatakse õppekirjanduses algparameetrite meetod staatika määratava tala sisejõudude ja siirete määramiseks eraldi. Allpool käsitletakse algparameetrite meetodi üldistatud varianti, mille puhul talale mõjuvad ... -
Varrastarindite arvutus maatrikstehetega : Õppevahend inseneriteaduskonna üliõpilastele
(Eesti Põllumajandusülikool, 1992)Kaasaegsetes arvutites lahendatakse ehitusmehaanika ülesanded maatrikstehetega. Seetõttu ei ole moodsate arvutusmeetodite, näiteks lõplike elementide meetodi esitamisel võimalik vältida maatriksalgebra kasutamist. Autori ... -
Modelling of Residual Stresses by Photoelastic Method during the Coating Deposition
(DGM Informationsgesellschaft, 1993)A calculating scheme according to which the process of material growth is regarded as a continuous growth of the equidistant to interface elementray layers with initial stresses is widely used for determination of residual ... -
Determination of Residual Stresses in the Coat Deposited bt Brush Plating
(DGM Informationsgesellschaft, 1993)The method of continuous growth described in the article enables the determination of initial stress in the brush plated coat by the circumferential strain of the short thin-walles cylindrical cathode. The Tihonov´s method ... -
Sur la détermination des contraintes résiduelles dans les cylindres creux non-homogénes
(Düsseldorf: VDI-Verlag, 1978)A theory is presented for determining residual stresses in non-homogeneous hollow cylinders by measuring deformations of the inside surface of the cylinders when material is added or removed from the outer surface. The ... -
Determination of Residual Stresses in Coatings and Coated Parts
(Tallinn Technical University, 1994)The methods of experimental residual stress analysis in coatings available at present are indirect. A distinct deformation parameter of a substrate or a coating should always be measured, from which the values of residual ... -
Consideration of Thermal Stresses in Experimental Residual Stress Analysis for Coatings
([Warsaw University of Technology], 2004)Usually, the coefficients of thermal expansion of the coating and substrate are different and the temperature of coating process differs from room temperature (20ºC). Therefore thermal stresses are generated in coated ... -
On the Determination of Residual Stress in Coatings from Measured Longitudinal Deformation of a Substrate
([Warsaw University of Technology], 2000)A method of measuring longitudinal deformation for determination of residual stresses in a long homogeneous cylinder by removal of thin cylindrical concentric layers was proposed by Heyn an Bauer [1]. In [2-6] it is shown ... -
Determination of Residual Stresses in Inhomogeneous Plates With Layer Growing/Removing Techniques
([Warsaw University of Technology], 1998)A generalized algorithm of the layer growing/removing methods is presented for computing residual stresses in a free rectangular isotropic inhomogeneous plate whose elastic parameters depend on its thickness coordinate. ... -
Layer Growing/Removing Method for the Determination of Residual Stresses in Inhomogeneous Spheres
([Warsaw University of Technology], 1998)A generalized algorithm of the layer growing/removing methods is presented for computing residual stresses in case of the multilayered hollow sphere from strain measurements on the free stationary surface or from X-ray ... -
Layer-Growing and Layer-Removing Methods for Residual Stress Analysis: General Algorithm
(Société Française de Métallurgie et des Métaux, 1996)This review paper presents an algorithm of layer-growing and layer-removing methods for the determination of residual stresses, which is of interest first of all in the study of residual stresses in coatings and in surface ...
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