Analysis of the Stress-strain State (SSS) Under Static Load of Nutation Speed Reducer

2019 ◽  
Vol 11 (10) ◽  
pp. 137-141
Author(s):  
Jasem Mohamad Ali ◽  
Krauinsh Peter Yanovich
Keyword(s):  
Strain State ◽  
Static Load ◽  
Stress Strain ◽  
Stress Strain State ◽  
Speed Reducer

scholarly journals Strength assessment of earth dams

2019 ◽  
Vol 265 ◽  
pp. 04015 ◽  
Author(s):  
Tokhirjon Sultanov ◽  
Bakhtiyor Yuldoshev ◽  
Elyor Toshmatov ◽  
Javlonbek Yarashov ◽  
Rustam Ergashev ◽  
...  
Keyword(s):  
Spatial Model ◽  
Strain State ◽  
Static Load ◽  
Comparative Method ◽  
Calculation Model ◽  
Earth Dams ◽  
Stress Strain ◽  
Strength Assessment ◽  
Stress Strain State ◽  
Assessment Of Stress

A comparative method for estimating the stress-strain state of earth dams under the effect of static load is given in the paper using spatial and plane-strain models. The results of assessment of stress-strain state of several earth dams using these methods are given. Analysis of the results obtained allows us to conclude that a plane calculation model gives results almost identical to the ones obtained with spatial model; in future that can be the basis for developing recommendations on the use of certain calculation models. Some features of stress state in a spatial case are revealed, indicating the occurrence of dangerous areas with the greatest stresses.

scholarly journals Stress-strain state of sandwiched coating and its node connections under static load

2021 ◽  
Vol 23 (3) ◽  
pp. 118-128
Author(s):  
S. V. Deordiev ◽  
M. Y. Belichenko ◽  
M. A. Krasiev ◽  
M. V. Butenko
Keyword(s):  
Strain State ◽  
Static Load ◽  
Experimental Studies ◽  
Environmentally Friendly ◽  
Structural Elements ◽  
Stress Strain ◽  
Stress Strain State ◽  
Frame Work ◽  
Wooden Structures

Today, the interest in wooden structures is being increased mainly because wood is an environmentally friendly material. In this regard, quite new wooden materials are developed between the 20th and 21st centuries. Improved are the methods for joining wooden elements and joints of structures. The paper presents the experimental studies of the sandwiched coating consisting of two frame work blocks, and nodal connections under the static load. It is shown that the stress distributes in the coating and on the surface of the nodal connections. The stresstrain curves are suggested for the nodal connections and structural elements of the coating.

КОНСТРУКТИВНО-ТЕХНОЛОГІЧНІ ОСОБЛИВОСТІ ХВОСТО-ВИХ БАЛОК СІТЧАСТОГО ТИПУ З ПОЛІМЕРНИХ КОМПО-ЗИЦІЙНИХ МАТЕРІАЛІВ ВЕРТОЛЬОТІВ ТРАНСПОРТНОЇ КАТЕГОРІЇ

2020 ◽  
pp. 15-30
Author(s):  
А. Г. Гребеников ◽  
И. В. Малков ◽  
В. А. Урбанович ◽  
Н. И. Москаленко ◽  
Д. С. Колодийчик
Keyword(s):  
Finite Element ◽  
Strain State ◽  
Layer Structure ◽  
Metal Structure ◽  
Element Model ◽  
Stress Strain ◽  
Element Analysis ◽  
Mesh Structure ◽  
Stress Strain State ◽  
Mesh Structures

The analysis of the design and technological features of the tail boom (ТB) of a helicopter made of polymer composite materials (PCM) is carried out.Three structural and technological concepts are distinguished - semi-monocoque (reinforced metal structure), monocoque (three-layer structure) and mesh-type structure. The high weight and economic efficiency of mesh structures is shown, which allows them to be used in aerospace engineering. The physicomechanical characteristics of the network structures are estimated and their uniqueness is shown. The use of mesh structures can reduce the weight of the product by a factor of two or more.The stress-strain state (SSS) of the proposed tail boom design is determined. The analysis of methods for calculating the characteristics of the total SSS of conical mesh shells is carried out. The design of the tail boom is presented, the design diagram of the tail boom of the transport category rotorcraft is developed. A finite element model was created using the Siemens NX 7.5 system. The calculation of the stress-strain state (SSS) of the HC of the helicopter was carried out on the basis of the developed structural scheme using the Advanced Simulation module of the Siemens NX 7.5 system. The main zones of probable fatigue failure of tail booms are determined. Finite Element Analysis (FEA) provides a theoretical basis for design decisions.Shown is the effect of the type of technological process selected for the production of the tail boom on the strength of the HB structure. The stability of the characteristics of the PCM tail boom largely depends on the extent to which its design is suitable for the use of mechanized and automated production processes.A method for the manufacture of a helicopter tail boom from PCM by the automated winding method is proposed. A variant of computer modeling of the tail boom of a mesh structure made of PCM is shown.The automated winding technology can be recommended for implementation in the design of the composite tail boom of the Mi-2 and Mi-8 helicopters.

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