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Luoyang QIBR Bearing Co.,LtdCall us : +86 − −(0379)63968877 // Email us : [email protected]
Luoyang QIBR Bearing Co.,LtdCall us : +86 − −(0379)63968877 // Email us : [email protected]
2017-12-17This Ph D thesis is the result of the project entitled Thermo-mechanical Modelling and Optimization of Dynamic Process Conditions in rictionF Stir Welding which has been carried out at the Process Modeling Group Department of Mechanical Engineering ecTh-nical University of Denmark (DTU) in the period from July 2006 to October 2009
2018-10-13Viscoelastic Model DMA (Dynamic Mechanical Analyzer) tests for mold compound material sample is performed to generate viscoelastic material relaxation function through curve fitting The experimental research on thermo warpage at different temperature for both PBGA and assembled PCBA is carried out by using the Shadow Morie method
2010-1-21Fully Coupled Thermo-Hydro-Mechanical Modeling by COMSOL Multiphysics with Applications in Reservoir Geomechanical Characterization Tony T Freeman* 1 Rick J Chalaturnyk1 Igor I Bogdanov2 1University of Alberta Canada 2Centre Huile Lourde Ouvert et Exprimental (CHLOE) France *Corresponding author: #2102- 8515- 112 Street- T6G1K7 Edmonton Canada
In a second step a three dimensional thermo‐mechanically coupled material model for finite deformations (see Chap 3) is motivated and formulated With this model it is possible to represent the temperature dependency of the mechanical properties as well as the self‐heating of the material due to dynamic
2018-8-30dynamic heat load is created A finite element model (FEM) of a two- beam module thermo-mechanical model has been compared to the experimental values and the cooling system has been removed by the water cooling system integrated in the RF structures The water is then cooled by an external chiller
The temperature and strain rate significantly affect the ballistic performance of UHMWPE but the deformation of UHMWPE under thermo-mechanical coupling has been rarely studied To investigate the influences of the temperature and the strain rate on the mechanical properties of UHMWPE a Split Hopkinson Pressure Bar (SHPB) apparatus was used to conduct uniaxial compression experiments
2009-2-3EXPLICIT COUPLED THERMO-MECHANICAL FINITE-ELEMENT MODEL OF CONTINUOUS CASTING OF STEEL IN FUNNEL MOLDS Seid Koric1 Lance C Hibbeler2 and Brian G Thomas2 1National Center for Supercomputing Applications-NCSA 2Department of Mechanical Science and Engineering University of Illinois at Urbana-Champaign
This paper presents an integrated model to study the electro-thermo-mechanical dynamic behaviors of motorized spindles The integrated model consists of four coupled submodels as follows: bearing built-in motor thermal and shaft model Based on the proposed model a design flow chart is developed and six design parameters are identified
This edition updates and expands the content in the original SPIE Tutorial Text to include new illustrations and examples as well as chapters about structural dynamics mechanical stress superelements and the integrated optomechanical analysis of a telescope and a lens assembly
This paper conducts a dynamic design of motorized spindles with different configurations using an integrated dynamic electro-thermo-mechanical model The dynamic electro-thermo-mechanical model consists of a thermo-mechanical bearing model a shaft dynamic model and a thermal model
This edition updates and expands the content in the original SPIE Tutorial Text to include new illustrations and examples as well as chapters about structural dynamics mechanical stress superelements and the integrated optomechanical analysis of a telescope and a lens assembly
Hereafter I present the state of art of the mechanical design of the polarimeter whose strategy is based on an integrated model of Zemax design into ANSYS FEM static and dynamic analyses with thermal loads applied in order to retrieve tip-tilt decentering errors and other significant parameters to be looped back to the Zemax model
This paper presents a new solution procedure for an integrated thermo-dynamic spindle model and validation results Based on the model presented in Part 1 of this paper a computer program has been developed to generate comprehensive solutions for high speed spindle-bearing systems such as bearing stiffness contact load and temperature spindle dynamic characteristics and response
2013-4-18An integrated thermo–mechanical finite element model for spindles was prepared by Holkup et al [23] They used a commercial finite element software (ANSYS) and modeled spindle shaft housing and bearings as axisymmetric elements where contact/geometrical nonlinearities and couples thermo–mechanical effects were considered
This paper presents an integrated model with experimental validation and sensitivity analysis for studying various thermo-mechanical-dynamic spindle behaviors at high speeds Specifically the following effects are investigated: the bearing preload effects on bearing stiffness and subsequently on overall spindle dynamics high-speed rotational
Integrated Dynamic Thermo-Mechanical Modeling of High Speed Spindles Part 1: Model Development Hongqi Li Graduate Research Assistant Using the new thermo-dynamic model more general and detailed bearing configurations can be modeled through a systematic coupling procedure The thermal expansions of the shaft housing and bearings are
Hereafter I present the state of art of the mechanical design of the polarimeter whose strategy is based on an integrated model of Zemax design into ANSYS FEM static and dynamic analyses with thermal loads applied in order to retrieve tip-tilt decentering errors and other significant parameters to be looped back to the Zemax model
2008-2-20A digital machining system is a core subsystem of a virtual machining system at the lowest level and it provides physical attributes of both the machining process and machine tool to the upper application level A digital machining system based on mechanistic models is developed An expandable general base model is built in the system and the interfaces for extending to upper level models are
Hereafter I present the state of art of the mechanical design of the polarimeter whose strategy is based on an integrated model of Zemax design into ANSYS FEM static and dynamic analyses with thermal loads applied in order to retrieve tip-tilt decentering errors and other significant parameters to be looped back to the Zemax model
2019-10-30This article presents a thermo-mechanical coupled dynamic model for high-speed motorized spindles The proposed model includes an angular ball bearing model a thermal model and a rotor dynamic model The coupling relationship among these submodels is analyzed and a solution procedure for the integrated model is designed
Hereafter I present the state of art of the mechanical design of the polarimeter whose strategy is based on an integrated model of Zemax design into ANSYS FEM static and dynamic analyses with thermal loads applied in order to retrieve tip-tilt decentering errors and other significant parameters to be looped back to the Zemax model
Proc SPIE 10012 Integrated Modeling of Complex Optomechanical Systems II 100120C (5 July 2016) doi: 10 1117/12 2199538 Read Abstract + In order to simulate and investigate the dynamical-optical behavior of high precision optics integrated modeling strategies and methods are
An integrated tunable microlens whose focal length may be varied over a range of 3 to 15 mm with total power consumption below 250 mW is presented Using thermo-pneumatic actuation this adaptive optical microsystem is completely integrated and requires no external pressure controllers for operation The lens system consists of a liquid-filled cavity bounded by a distensible polydimethyl
2019-4-3Thermo-mechanical coupled process Non-spherical grains Discrete studyelement gradientmethod with Thermally induced damage a b s t r a c t induced often occurs in rocks in geophysical systems Discrete element method (DEM) is a useful tool to model this thermo-mechanical coupled process owing
2018-2-15A simple analytical thermo-mechanical model accounting for the non-uniform feature of the temperature/strain distribution along the thickness direction is established for this type of bilayer structure The analytical predictions of the temperature and bending curvature radius agree well with finite element analysis and experiments
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