M. A. Chetoui , O. Boiron , A. Dogui , V. Deplano ,
 Université de Monastir, Ecole Nationale D'ingénieurs de Monastir; Ecole centrale Marseille, Marseille, France
 Aix-Marseille Université, CNRS, Ecole Centrale, Marseille, France
 Université de Monastir, Ecole Nationale D'ingénieurs de Monastir, Marseille, France
Intervertebral discs (IVD) are fibro-cartilages situated between vertebrae providing their joint flexibility. They play a major role in the transmission and absorption of load through the spine. The disc can undergo progressive structural and quantitative changes in its composition and morphology related to mechanical load applied to the spine which can lead to disc degeneration; this disease is ...
F. Mbailassem , Q. Leclere ,
 LVA - INSA de Lyon, France
This paper introduces an efficient model to describe energy dissipation in acoustic. When the propagation domain has hard wall boundary conditions only viscous and thermal losses happen and are completely described by the so-called Full Linearized Navier-Stokes model (FLNS) which is implemented in thermoacoutics interface using the COMSOL Acoustics Module. This model defined by a set of ...
R. Kapuganti , S. Anbazhagan,
 HCL Technologies, Chennai, India.
Drop test simulation is one of the important tool used for the impact behaviour study of electronic components. It identifies the flaws in design. The reliability and performance of electronic consoles after the drop is a major concern. Devices are expected to continue functioning after suffering a drop. The model is allowed to fall freely due to gravity load application. Drop test standard ...
目前的商用有限元软件中，描述导体材料多采用为双线性或者多线性硬化的本构模型，而如纯铜、铜铌合金等材料均在疲劳加载过程中展现出了明显的棘轮效应等循环变形特征。线性硬化模型最大的一个缺陷是不能反映材料的循环硬化/软化、棘轮行为等循环变形特征；相反，非线性硬化模型能对导体材料的循环变形特征行为更为合理的模拟。另外，商用软件存在两方面不可避免的问题，一是非线性随动硬化模型发展迅速，商用软件内嵌的模型不能及时更新至目前更为合理的循环塑性模型，二是不能通过定义损伤变量来对材料损伤造成的材料承载能力的下降进行描述。解决以上问题，可利用商业软件提供的材料二次开发接口，通过编写二次开发子程序来实现用户所需的本构模型或功能。 在金属材料的循环塑性本构模型中，以 Armstrong-Frederick 随动硬化模型为基础进行修改和改进的非线性随动硬化模型得到了更为广泛的发展和应用，具有代表性的有 ...
R. Christensen ,
 GN ReSound A/S, Ballerup, Copenhagen, Denmark
When acoustic applications include small geometries, i.e. mm/submillimeter range, so-called thermoviscous effects can greatly affect the pressure response. This paper deals with acoustic topology optimization of such miniature structures with thermoviscous effects taken into account. The most general method for calculating acoustics with thermoviscous effects involves solving the Full ...
J. Güdelhöfer , R. Gottkehaskamp , A. Möckel ,
 University of Applied Sciences Düsseldorf, Düsseldorf, Germany
 Technical University of Ilmenau, Ilmenau, Germany
The calculation of additional losses in induction machines is a challenging task. In skewed motors, a part of these losses is connected to the phenomena of inter-bar currents. Inter-bar currents flow between adjacent bars through the rotor lamination. Since they are aligned perpendicular to bar currents, they cannot be calculated with 2D FEM, where the motor geometry is cut perpendicular to its ...
C. Calzolaio , H. Carolin , S. Stephane ,
 Paul Scherrer Institut, Villigen, Switzerland
The use of proton therapy for cancer treatment shows a growing trend, since the radiation dose delivered to the target volume is maximized and the dose to the surrounding healthy tissues is minimized. To direct the proton beam from all directions to the tumor in the patient, the last part of the beam transport system is mounted on a gantry rotating 360° around the patient. This system consists ...
Y. Xing , R. Hu , Q. Liu ,
 Geoscience Centre, University of Goettingen, Goettingen, Germany
 School of Earth Science and Engineering, Hohai University, Nanjing, China
Deformation prediction is an important part of the structure stability analysis. However, the deformation of bank protection structure which is affected by many factors, such as structural stiffness, earth pressure and hydrostatic pressure. It contains a complex mechanical process, which is a grey, fuzzy, stochastic and nonlinear engineering problem. Neural network method as one of nonlinear ...
A. Nowicki , A. Bennecer ,
 Mechanical Engineering, University of Northampton & Gdańsk University of Technology, Gdańsk, Poland
 Engineering, University of Northampton, Northampton, United Kingdom
A Microbolometer is a specific type of uncooled infrared radiation detector used in thermal cameras, which converts the incoming energy into a proportionate electrical signal, which is then amplified, processed and displayed, typically on the thermal camera’s LCD viewer. The main principle of operation of a microbolometer is a thermally sensitive layer which is exposed to incident ...