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Wyszukujesz frazę "contact analysis" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Contact mechanics and wear simulations of hip resurfacing devices using computational methods
Autorzy:
Ali, M.
Mao, K.
Powiązania:
https://bibliotekanauki.pl/articles/307273.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
archard wear law
biotribology elbow
contact
finite element analysis
wear
biotribologia
kontakt
zużycie
Opis:
The development of computational and numerical methods provides the option to study the contact mechanics and wear of hip resurfacing devices. The importance of these techniques is justified by the extensive amount of testing and experimental work required to verify and improve current orthopaedic implant devices. As the demands for device longevity is increasing, it is as important as ever to study techniques for providing much needed orthopaedic hip implant solutions. Through the use of advanced computer aided design and the finite element method, contact analysis of hip resurfacing devices was carried out by developing both three-dimensional and twodimensional axisymmetric models whilst considering the effects of loading conditions and material properties on the contact stresses. Following on from this, the three-dimensional model was used in combination with a unique programme to develop wear simulations and obtain cumulative wear for both the acetabular cup and femoral head simultaneously.
Źródło:
Acta of Bioengineering and Biomechanics; 2014, 16, 2; 103-110
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global buckling prevention condition of all-steel buckling restrained braces
Autorzy:
Hoveidae, N.
Rafezy, B.
Powiązania:
https://bibliotekanauki.pl/articles/949153.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
all-steel buckling restrained brace
global buckling
finite element analysis
contact friction coefficient
cyclic loading
Opis:
One of the key requirements for the desirable mechanical behavior of buckling restrained braces (BRBs) under severe lateral loading is to prevent overall buckling until the brace member reaches sufficient plastic deformation and ductility. This paper presents finite element analysis results of proposed all-steel buckling restrained braces. The proposed BRBs have identical core sections but different Buckling Restraining Mechanisms (BRMs). The objective of the analyses is to conduct a parametric study of BRBs with different amounts of gaps and cores and BRM contact friction coefficients to investigate the global buckling behavior of the brace. The results of the analyses showed that BRM flexural stiffness could significantly affect the global buckling behavior of a BRB. However, the global buckling response occurred to be strongly dependent upon the magnitude of the friction coefficient between the core and the encasing contact surfaces. In addition, the results showed that the global buckling response of BRBs with direct contact of the core and BRM is more sensitive to the magnitude of contact friction coefficient.
Źródło:
Journal of Theoretical and Applied Mechanics; 2013, 51, 4; 891-902
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite element analysis of mini-plate stabilization of human mandible angle fracture – a comparative study
Autorzy:
Wądołowski, Piotr
Krzesiński, Grzegorz
Gutowski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/27324127.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
finite element analysis
maxillofacial surgery
mandibular angle fracture
miniplate osteosynthesis
contact mechanics
analiza elementów skończonych
chirurgia szczękowo-twarzowa
złamanie kąta żuchwy
osteosynteza minipłytkowa
mechanika kontaktowa
Opis:
Purpose: The purpose of this study was to analyze three patterns of mandible angle fracture treatment by means of the finite element analysis. Methods: Investigation has been based on the mandible geometry reconstructed with use of hospitalized patient CT data. The KLS Martin mini-plates with corresponding screws were used to establish proper fracture stabilization. Models were run assuming isotropic and elasto-plastic material properties of connecting devices and cortical bone. The main masticatory muscles and artificial temporomandibular joint have been incorporated to assure mandible physiological movement. The gage loading has been applied in three different locations to cover wider range of possible mastication loading cases during daily routine. A different contact conditions have been applied to the fracture plane to simulate both load bearing and sharing behaviors. Prepared FEM models reflect the most frequently used surgery’s approaches to mandible angle fracture treatment. A specific nomenclature has been introduced to describe particular model. The tension plate, with one connecting mini-plate, two-point fixation and combined fixation, both using two mini-plates respectively. Results: Performed analysis allowed for a detailed estimation of the mini-plate connection response under the applied gauge loading. The equivalent stress within the mini-plates and surrounding cortical bone have been compared between all models. Regarding the fracture plane, the contact status and pressure have been considered. Conclusions: The combined fixation model, acting as a biplanar fastener system, presents the highest flexibility and connection efficiency.
Źródło:
Acta of Bioengineering and Biomechanics; 2020, 22, 3; 105--116
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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