نتایج جستجو برای: dynamic loading

تعداد نتایج: 475781  

ژورنال: مجله دندانپزشکی 2018

Background and Aims: For the clinical success of implant-retained prostheses, fitness of matching components and stability of the applied torque to the implant-abutment assembly under dynamic occlusal loading is essential. The aim of this study was to evaluate the torque loss in Co-Cr castable abutments after cyclic loading. Materials and Methods: 10 castable abutments were cast in Co-Cr alloy...

2010
Chi Li Xiaobing Lu Shuyun Wang

The liquefaction deformation of sand layer around a bucket foundation is simulated under equivalent dynamic ice-induced loadings. A simplified numerical model is presented by taking the bucket-soil interaction into consideration. The development of vertical and horizontal liquefaction deformations are computed under equivalent dynamic ice-induced loadings. Firstly, the numerical model and resul...

اکبری, جلال, میرزایی, سمانه,

For solving the dynamic equilibrium equation of structures, several second-order numerical methods have so far been proposed. In these algorithms, conditional stability, period elongation, amplitude error, appearance of spurious frequencies and dependency of the algorithms to the time steps are the crucial problems. Among the numerical methods, Newmark average acceleration algorithm, regardl...

Journal: :Tissue engineering. Part A 2012
Liming Bian David Y Zhai Emily C Zhang Robert L Mauck Jason A Burdick

Mesenchymal stem cells (MSCs) are being recognized as a viable cell source for cartilage repair, and there is growing evidence that mechanical signals play a critical role in the regulation of stem cell chondrogenesis and in cartilage development. In this study we investigated the effect of dynamic compressive loading on chondrogenesis, the production and distribution of cartilage specific matr...

2007
Andrew Kemper Craig McNally Sarah Manoogian Dave McNeely Stefan Duma

There have been numerous researchers that have investigated the properties of human intervertebral discs. However, there has been no attempt to characterize the effects of dynamic loading on the compressive stiffness of human lumbar intervertebral discs. Therefore, the purpose of this study was to develop the compressive stiffness properties of lumbar intervertebral discs when subjected to vari...

2004
Alistair Walker

The Health and Safety Executive have commissioned KW Ltd to carry out a fundamental assessment of the dynamic characteristics of jack-up structures. The overall objective of the study is to develop an understanding of the possible failure modes of such structures and to prepare a basis for the fundamental modelling of the dynamic interaction of the structure, loading and foundations of jack-up ...

2017
Devon E. Anderson Brian Johnstone

Articular cartilage functions to transmit and translate loads. In a classical structure-function relationship, the tissue resides in a dynamic mechanical environment that drives the formation of a highly organized tissue architecture suited to its biomechanical role. The dynamic mechanical environment includes multiaxial compressive and shear strains as well as hydrostatic and osmotic pressures...

2002
Yukou Takahashi Yuji Kikuchi Fumie Mori Atsuhiro Konosu

The goal of this study was to develop a finite element (FE) lower limb model that can be used for direct and accurate injury prediction. Threedimensional geometry of the lower limb bones and knee ligaments was determined from MRI scans of a human volunteer for an accurate geometry reconstruction. In order to address various loading conditions in car-pedestrian accidents, the dynamic response of...

2007

The behaviour and properties of a material during deformation is, among others, influenced by external factors, which also include the strain rate. The strain rate has a significant effect on the material behaviour during the deformation (forming) process 1,2 , as well as on the final properties of products 3,4,5 . Dynamic loading has also a significant effect on the degradation of the properti...

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