On the possibility of using of small diameter pine round timber with defects in construction
Strength is assumed - index for materials which can take standard, calculated values. Significant dependence between bending resistance, absolute size of structural elements. The structure of the wood fibers - factor which determine timber quality.
Подобные документы
Analysis of the existing methods of the automatic regulation of the process of the drying of timber. Algorithm of the regulator of kiln drier. The need of regulating the drying process taking into account the characteristics of wood and drying agent.
статья, добавлен 28.11.2016Application and classification of construction materials. Definition of key indicators affecting the choice of material. Alloys based on copper and aluminum. Properties, applications and benefits of innovative materials, thermosetting plastics, ceramics.
статья, добавлен 10.03.2019Proposal and implementation of a new methodology for calculating the bending finned tubes for heat exchange systems. Getting high-quality bends with minimum radius of bending pipes bimetallic and monometallic. The use of technology in the helical rolling.
статья, добавлен 24.02.2016Impact indicators coal shiites in the properties of the resulting coke. Coking process with the help of passive experiment. Effect of changes in the number of components of the coal charge on the quality of the coke at various technologies of sintering.
статья, добавлен 29.07.2016- 5. Structural and electro-physical properties of heterogenous film materials based on refractory metals
Structural phase composition analysis of heterogenous film materials based on refractory metals is presented. A thermal activity nature of their conductivity was determined. Of investigation were estimated thermal resistance coefficient and energy.
статья, добавлен 30.07.2016 Types of tool materials: from high-carbon steel to ceramics and diamonds, and their use as cutting tools in the modern metal industry. Cutting tool and its characteristics: hardness, strength. Achieving an acceptable tool life before replacing it.
статья, добавлен 26.04.2019Technology of iron-concrete products. Optimization of experiment in chemistry and chemical technology. Blocks from rocks for facing, architectural-construction, memorial and other products. Methods of determining water absorption and frost resistance.
статья, добавлен 29.07.2021Features of the two-phase model of the structure of keratin fibers. Estimation of the importance of critical and equilibrium stresses in the fibril, transfer of its stress to the matrix. Study of a possible connection between microfibrils and matrix.
статья, добавлен 30.05.2022Model for calculation of nominal stresses in characteristic points of the surface fatigue crack to the tubular shaft in bending with rotation. Reasons for the decrease of the propagation velocity of cracks in the center and changing the geometry.
статья, добавлен 28.09.2016The research revealing of the amount of regular wood and hazardous wood treated in Finland in this year. The most common techniques are applied to wood treatment in this country. Hazardous waste processing. Prevention of producing waste. Energy recovery.
реферат, добавлен 16.11.2014Production polystyrene composite films with small content of fullerenes (up to 1 %) by casting o-xylene solutions. A dependence of the glass transition temperature of the composite material on its composition. The adsorption capacity of polymer material.
статья, добавлен 30.07.2016The study of structural changes during hot deformation metal during controlled rolling. The influence of preheating temperature and deformation degree on the size and shape of austenite grains. The definition of the polygonal structure of the austenite.
статья, добавлен 30.01.2017Analysis of the main causes of destruction of adhesive joints. Structural and technological stress concentrators, because of which cracks develop during operation. General characteristics of the resistance of adhesive bonding to failure at all stages.
статья, добавлен 30.04.2018The method of reducing costs and increasing the strength of threaded joints, which are currently used in every field of human activity. Experimental research on the relation between thermal treatment and strength of adhesively sealed joints was con
статья, добавлен 28.09.2016Analysis of the overall stiffness range of most plastics in combination with common efforts to use the thinnest wall thickness possible. Dependence of plastics processing processes on tool quality and process parameters. Basic design considerations.
статья, добавлен 10.03.2019Determination the rigidity of constructive elements involved into the rated diagram of electromechanical system of the drive of spherical mill. Defining the rigidity of the elements entering a kinematic circuit of any electromechanical systems of drives.
статья, добавлен 28.11.2016The optimization procedure in computer-aided design problem. The methodic of optimal weight coefficients values choice. The use of structural models in the form of tables and morphological trees of quality variants of the signs of aerial vehicles.
статья, добавлен 14.09.2016The paper presents the design of experimental cells, a description of materials for construction and construction process, and preliminary results. The objective of the work is proving which of the MBT fractions function better for methane degradation.
статья, добавлен 08.10.2020- 19. Awareness and Attitude of Latvian Construction Companies Towards Sustainability and Waste Recycling
Construction and Demolition Waste (CDW). Accepted that reliable strategies and innovative technologies need to be developed to increase the share of CDW-derived materials in new residential constructions while simultaneously minimizing future CDW.
статья, добавлен 14.03.2022 Test the tribological properties of lubricants as the main stage of assessing their suitability for use in friction. The scheme of the "cone - three ball" with the use of objects of simple geometric shapes to test different construction materials.
статья, добавлен 29.01.2016Analyzed the impact of long-term operation of gas pipelines, as well as natural stress concentrators on the physico-mechanical properties of welded joints of steel 17G1S. Regularities of the destruction of the material of welded joints of gas pipelines.
статья, добавлен 30.01.2016The role of piezoelectric transducers in electro- and hydroacoustics, where they are intended for radiation and reception of acoustic vibrations in air or aquatic environment. The use of monomorphic and bimorph elements for the manufacture of transducers.
статья, добавлен 30.08.2016Using transmission electron microscopy methods the layer by layer analysis of the bulk hardened superior quality rails is carried out, phase state and defect substructure gradients are established. Character of changing of structure-phase states.
статья, добавлен 30.07.2016The flexural and compressive strength of mortar by partial replacement of cement with Nano-ZnO particles has been studied. The results showed that the flexural and compressive strength of the cement mortars with ZnO were higher than pure cement mortar.
статья, добавлен 12.06.2018- 25. The influence mechanism of ferrite grain size on strength stress at the fatigue of low-carbon steel
The study of the properties of low carbon steel. Methods of cold plastic deformation. The rationale for the recommended annealing temperature. Is the microstructure of low-carbon metal. The study of the conditions of plastic deformation of ferrite.
статья, добавлен 29.01.2016