Temat: load analysis - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A prediction method for load distribution in threaded connections
Autorzy:: Zhang, D.
Gao, S.
Niu, S.
Liu, H.
Powiązania:: https://bibliotekanauki.pl/articles/949123.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: load distribution
threaded connections
finite element analysis
Opis:: A new method has been developed for predicting the load distribution along the thread portion of a bolt and nut connection. The calculated results were validated by comparison with three-dimensional finite element analysis and Yamamoto’s method. It was shown that the load distribution predicted by the model in this paper was in good agreement with the results from finite element model, and the load ratio on the first thread by the prediction model and finite element model was slightly larger than the results from Yamamoto’s method. In addition, the results of calculation and finite element analysis indicated that the decreasing of the lead angle could improve the load distribution, the increasing of the length of thread engaged could significantly improve the load bearing capacity of the first thread, and the adopting of a material with low stiffness for the nut with respect to the bolt could improve the load distribution slightly.
Źródło:: Journal of Theoretical and Applied Mechanics; 2018, 56, 1; 157-168
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Numerical modelling of the thermo-mechanical response of a rocket motor to exhaust gases load
Autorzy:: Orłowska, M.
Panas, A. J.
Rećko, K.
Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/280124.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: solid propellant rocket motors
thermo-elastic FEM analysis
nozzle thermal load
Opis:: A numerical model for analysis of thermal and mechanical loads of a rocket motor has been developed. This model of a solid propellant motor corresponds to a short range, fast lunch and cruise type missile. It has been elaborated using the Finite Element Method (FEM) incorporated into commercial Comsol/M code. The experimental data on the thrust profile have been utilised to develop proper initial and boundary conditions for forgoing numerical calculations. The studies have been focused on the temperature and stress evolution within the case and nozzle section of the rocket engine. A special attention has been paid to the graphite insert of the rocket motor throat. The performed analyses proved effectiveness of the modelling methodology that will be applied to investigations of the modified motor performance.
Źródło:: Journal of Theoretical and Applied Mechanics; 2014, 52, 3; 803-814
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Numerical and experimental analysis of a segmented wind turbine blade under assembling load effects
Autorzy:: Yangui, Majdi
Bouaziz, Slim
Taktak, Mohamed
Debut, Vincent
Antunes, Jose
Haddar, Mohamed
Powiązania:: https://bibliotekanauki.pl/articles/280526.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: segmented wind turbine blade
experimental modal analysis
shell element modeling
assembling load
Opis:: In this paper, numerical and experimental modal analysis of a segmented wind turbine blade assembled with a steel threaded shaft and a nut are presented. The blade segments are built by a 3D printer using ABS material. The experimental modal parameters identification has been achieved using the Eigen system Realization Algorithm (ERA) method for different values of the blade segments assembly force caused by the nut tightening torque. Furthermore, a three dimensional finite element model has been built using DTK18 three node triangular shell elements in order to model the blade and the threaded shaft structure, taking into account the additional stiffness caused by the nut tightening torque. This study covers the blade segments assembly force effects on the rotating blade vibration characteristics. The numerical model is adjusted and validated by the identified experimental results. This work highlights the significant variation of the natural frequencies of the segmented wind turbine blade by the assembling load of the segments versus blade rotating speed.
Źródło:: Journal of Theoretical and Applied Mechanics; 2019, 57, 1; 85-97
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Stress and load distribution analysis in bolt connection with modified thread profile under high temperature conditions
Autorzy:: He, Liange
Zhang, Bin
Guo, Caidong
Shi, Wenjun
Powiązania:: https://bibliotekanauki.pl/articles/2055053.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: bolt connection
thread design
load distribution of bolt
high temperature creep test
finite element analysis
Opis:: In this paper, the load distribution of a bolt connection structure with a variable thread profile at high temperature is investigated. The parameters of time-hardening creep model of aluminum alloy at high temperature were obtained by fitting the uniaxial creep tensile test data of aluminum alloy at 250◦C. Based on ABAQUS, a two-dimensional axisymmetric model of the bolt connection structure was established, and according to the thread load distribution considering linear elasticity, plasticity and creep characteristics, modification of standard metric thread profile was carried out. The load distribution law of the thread of the modified bolt connection structure were investigted. The results show that the load- -bearing ratio of the first thread can be significantly reduced and the load-bearing distribu- tion uniformity of all threads can be improved when the modified thread is applied to the bolt connection structure.
Źródło:: Journal of Theoretical and Applied Mechanics; 2021, 59, 3; 469--480
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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