scholarly journals Steady State Thermal Effect on Static Characteristic of Copper Roller Shaft

2021 ◽  
Vol 2117 (1) ◽  
pp. 012036
Author(s):  
E Marliana ◽  
G P Utomo ◽  
S Fuad ◽  
A A Arifin
Keyword(s):  
Heat Flux ◽  
Steady State ◽  
Thermal Effect ◽  
Equivalent Stress ◽  
Static Characteristic ◽  
Total Heat Flux ◽  
Total Deformation ◽  
Maximum Equivalent Stress ◽  
Slab Temperature ◽  
Thermal Steady State

Abstract The static analysis of a copper roller shaft is performed. The copper roller shaft consists of bushing, pen roll and roller. All of those components g4bconsist of different materials. Thermal steady state and statical analysis is performed in order to investigate the thermal effect of high temperature copper slab on the roller shaft. The copper slab temperature is 1200 OC. Based on this work obtained that the maximum total deformation is 0.0050523 m, maximum equivalent stress is 41600 MPa, maximum life cycle is 1011, total heat flux maximum is 879910 W/m2 and the maximum damage occur in the pen roll component.

Role of blood as heat source or sink in human limbs during local cooling and heating

1994 ◽  
Vol 76 (5) ◽  
pp. 2084-2094 ◽  
Author(s):  
M. B. Ducharme ◽  
P. Tikuisis
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Steady State ◽  
Heat Source ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Total Heat Loss ◽  
Partial Immersion ◽  
Thermal Steady State

The objective of the present study was to investigate the relative contribution of the convective heat transfer in the forearm and hand to 1) the total heat loss during partial immersion in cold water [water temperature (Tw) = 20 degrees C] and 2) the heat gained during partial immersion in warm water (Tw = 38 degrees C). The heat fluxes from the skin of the forearm and finger were continuously monitored during the 3.5-h immersion of the upper limb (forearm and hand) with 23 recalibrated heat flux transducers. The last 30 min of the partial immersion were conducted with an arterial occlusion of the forearm. The heat flux values decreased during the occlusion period at Tw = 20 degrees C and increased at Tw = 38 degrees C for all sites, plateauing only for the finger to the value of the tissue metabolic rate (124.8 +/- 29.0 W/m3 at Tw = 20 degrees C and 287.7 +/- 41.8 W/m3 at Tw = 38 degrees C). The present study shows that, at thermal steady state during partial immersion in water at 20 degrees C, the convective heat transfer between the blood and the forearm tissue is the major heat source of the tissue and accounts for 85% of the total heat loss to the environment. For the finger, however, the heat produced by the tissue metabolism and that liberated by the convective heat transfer are equivalent. At thermal steady state during partial immersion in water at 38 degrees C, the blood has the role of a heat sink, carrying away from the limb the heat gained from the environment and, to a lesser extent (25%), the metabolic and conductive heats. These results suggest that during local cold stress the convective heat transfer by the blood has a greater role than that suggested by previous studies for the forearm but a lesser role for the hand.

BIOMECHANICAL STABILITY OF THE CERVICAL SPINE AFTER UNCINATE PROCESS RESECTION: A FINITE ELEMENT ANALYSIS

2015 ◽  
Vol 15 (06) ◽  
pp. 1540049 ◽  
Author(s):  
XUEFENG BO ◽  
XI MEI ◽  
HUI WANG ◽  
WEIDA WANG ◽  
ZAN CHEN ◽  
...  
Keyword(s):  
Finite Element ◽  
Cervical Spine ◽  
Equivalent Stress ◽  
Three Dimensional ◽  
Element Model ◽  
Uncinate Process ◽  
Total Deformation ◽  
Maximum Equivalent Stress ◽  
Left And Right ◽  
The Stability

When performing anterolateral foraminotomy for the treatment of cervical spondylotic radiculopathy, the extent of uncinate process resection affects the stability of the cervical spine. The aim of this study was to determine the stability of the cervical spine after resection of various amounts of the uncinate process. Based on computed tomography (CT) scans of an adult male volunteer, a three-dimensional geometric model of the cervical spine (C4-C6) was established using Mimics 13.1, SolidWorks 2012, and ANSYS 15.0 software packages. Next, the mechanical parameters of the tissues were assigned according to their different material characteristics. Using the tetrahedral mesh method, a three-dimensional finite element model of the cervical spine was then established. In modeling uncinated process resection, two excision protocols were compared. The first excision protocol, protocol A, mimicked the extent of resection used in current clinical surgical practice. The second excision protocol, protocol B, employed an optimal resection extent as predicted by the finite element model. Protocols A and B were then used to resect the left uncinate process of the C5 vertebra to either 50% or 60% of the total height of the uncinate process. The stability of the cervical spine was assessed by evaluating values of deformation and maximum equivalent stress during extension, flexion, lateral bending, and rotation. After protocol A resection, the total deformation was increased as was the maximum equivalent stress during left and right rotation. After protocol B resection, the total deformation was little changed and the maximum equivalent stress was visibly decreased during left and right rotation. As evidenced by these results, protocol B resection had relatively little effect on the stability of the cervical spine, suggesting that resection utilizing the limits proposed in protocol B appears to better maintain the stability of the cervical spine when compared with current clinical surgical practice as replicated in protocol A.

Study on the Strength of Axial Fan Blades Based on Fluid-Solid Coupling

2013 ◽  
Vol 448-453 ◽  
pp. 3382-3385
Author(s):  
Song Ling Wang ◽  
Shou Fang Liang ◽  
Bin Hu ◽  
Lei Zhang
Keyword(s):  
Flow Field ◽  
Field Data ◽  
Equivalent Stress ◽  
Aerodynamic Load ◽  
Total Deformation ◽  
Axial Fan ◽  
Static Structure ◽  
Maximum Deformation ◽  
Maximum Equivalent Stress ◽  
Distribution Of Stress

Based on one-way fluid-solid coupling, a variable pitch axial fan was simulated through ANSYSY Workbench platform. With the software Fluent to describe the flow field and the software Mechanical to describe the structure field, the static structure analysis of the blades was carried out to study the strength of the blades. The flow field data were applied on the blades by interpolation. The results show that the centrifugal force plays an important role on the strength characteristics of the blades. Considering the aerodynamic load, the distribution of stress of the blades tends to be more uneven, the maximum equivalent stress reduces by 4.5% and the maximum deformation decreases by 26.6%. With the increase of flow, the maximum equivalent stress and the maximum total deformation of the blades decrease gradually.

Analysis and Optimization of Dismantling Machine Shear Head Based on ANSYS Workbench

2014 ◽  
Vol 945-949 ◽  
pp. 653-657
Author(s):  
Wan Peng Du ◽  
Yong Jian Zhang ◽  
Chen Quan Zhou ◽  
Ai Hui Zhang ◽  
Ji Yu ◽  
...  
Keyword(s):  
Topology Optimization ◽  
Shear Force ◽  
Equivalent Stress ◽  
Three Dimensional ◽  
Total Deformation ◽  
Design Variables ◽  
Maximum Shear Force ◽  
Maximum Equivalent Stress ◽  
Three Dimensional Models ◽  
Ansys Workbench

The object is dismantling machine shear head with 500kN’s maximum shear force. The three-dimensional models, static analysis, topology optimization were done in the ANSYS Workbench. And the goal driven optimization was done which based on topology optimization. The maximum total deformation, maximum equivalent stress and geometry mass were selected as objective parameters and the distance of two connecting holes, diameter of long hole and length of blade as design variables. At last, the optimized structure was checked. The strength and rigidity meet the requirements and the mass decreased.

Optimization Design of EMU Process Bogie Wheel Frame Based on ANSYS

2014 ◽  
Vol 556-562 ◽  
pp. 1446-1449
Author(s):  
Jun Dai
Keyword(s):  
Optimization Design ◽  
Equivalent Stress ◽  
Static Characteristic ◽  
Frame Structure ◽  
Ansys Software ◽  
Modal Shape ◽  
Structure Deformation ◽  
Maximum Equivalent Stress ◽  
Saw Blade ◽  
D Model

According to the saw blade for process bogie structure characteristics,the use of Pro /E 3 d software based on the 3 d model,with ANSYS software,a static and modal analysis,obtained the stress pattern,structure deformation diagram and the former 6 order natural frequency and modal shape. The analysis results show that the node the maximum equivalent stress and the maximal displacement nodes are within the scope of the provisions,the data are meet the requirements,frame structure overall stiffness is better,frame has good static characteristic and dynamic characteristic,can meet the design requirements.And on this basis to frame was further optimized,so as to save materials,reduce cost.The theoretical basis is provided for the development of the process bogie .

Analysis on Static Characteristic of HTC100 NC Lathe Bed

2012 ◽  
Vol 226-228 ◽  
pp. 617-620
Author(s):  
Mo Wu Lu ◽  
Guo Ming Zhang
Keyword(s):  
Machine Tool ◽  
Working Conditions ◽  
Production Efficiency ◽  
Equivalent Stress ◽  
Static Characteristic ◽  
Machining Accuracy ◽  
Static Stiffness ◽  
Total Deformation ◽  
Cnc Lathe ◽  
Heavy Machine

HTC 100 CNC lathe is a heavy machine tool. The lathe bed is the important part of the machine tool. The static characteristic of the lathe bed directly influence the machining accuracy and production efficiency of the machine tool. At present, the lathe bed design general depends on the designer’s experience. In this paper, the static analysis of the HTC100 CNC lathe bed is carried out with ANSYS 12.0. The node equivalent stress distribution cloud, the total deformation distribution of Lathe bed and the maximum distortion under various kinds of working conditions are obtained. According to the result, the structure of lathe bed design tends to conservative and the distribution of static stiffness is unreasonable, which is necessary to optimum design.

Sequential Quadratic Programming Method of Cabin Optimization

2014 ◽  
Vol 711 ◽  
pp. 96-99
Author(s):  
Han Liu ◽  
Fang Zhen Song ◽  
Ming Ming Li ◽  
Bo Song
Keyword(s):  
Quadratic Programming ◽  
Sequential Quadratic Programming ◽  
Maximum Shear Stress ◽  
Equivalent Stress ◽  
Static Characteristic ◽  
Programming Method ◽  
Element Analysis ◽  
Maximum Equivalent Stress ◽  
Sequential Quadratic Programming Method ◽  
Quadratic Programming Method

The basic principle of sequential quadratic programming method and the concrete implementation steps in MATLAB are expounded. Sequential quadratic programming method is used for the cabin structure optimization. In the optimization, the minimal sizes of components stipulated by the rules are used as size constraints, the frequencies required by the rules are used as performance constraints and the minimum lightness of the ship are used as objective. Finite element analysis of the ship structure optimized is done and the results obtained show that both the maximum equivalent stress and the maximum shear stress meet the requirements and first three order frequencies of the cabin structure are also far away from the working frequency of propeller and host. The optimization reduces the weight of the cabin under the condition of meet the static characteristic and dynamic characteristic.

scholarly journals Topology Optimization of a Straight Subsoiler through Computer Mathematical Modelling

2020 ◽  
pp. 35-46
Author(s):  
Saqib Parvaze Allaie ◽  
Ashok Tripathi ◽  
P. M. Dsouza ◽  
Sabah Parvaze
Keyword(s):  
Structural Analysis ◽  
Mathematical Modelling ◽  
Design Optimization ◽  
Principal Stress ◽  
Safety Factor ◽  
Equivalent Stress ◽  
Maximum Principal Stress ◽  
Total Deformation ◽  
Input Parameters ◽  
Maximum Equivalent Stress

Technologies and computer programs available today provide us with design programs and analytical techniques for solving complex problems in the different engineering disciplines. These technologies and programs have also found their significance in agricultural research. Computer-aided mathematical modelling was used for carrying out the design optimization of a straight subsoiler. At the initial stage, the static structural analysis under static loading conditions was performed. Details on the material and dimensions for the subsoiler were acquired from the manufacturer at the regional level. The existing subsoiler was then optimized for shank thickness, curve length, and shank width. Optimization was carried out for the objectives seeking minimum solid mass and maximum safety factor. The optimized design obtained was remodeled, and its static analysis performed. Results of the stresses, deformation, and safety factor before and after optimization were compared, and the conclusions drawn. The static structural analysis revealed that before optimization, the subsoiler mass was 24.54 kg, and the volume was 3117701.77 mm3. The maximum total deformation was 4.959 mm, maximum equivalent stress was 270.09 MPa, and the maximum principal stress was 295.06 MPa.  The minimum value for the safety factor was 1.296. Parametric correlation of the input and output parameters showed that the relationship among two input parameters viz. shank thickness, shank width, and output parameters was strong. These input parameters were used for response surface generation and design optimization. Optimization reduced both the subsoiler mass and volume by 14.86 %. The maximum equivalent stress and maximum principal stress reduced by 4.10% and 5.39%, respectively, while the total deformation, minimum safety factor, and maximum working life increased by 7.15%, 4.28%, and 14.26%, respectively.

scholarly journals Steady State Thermal Analysis to Investigate Total Heat Flux in a Fiber Metal Laminate for Variable Thickness

2021 ◽  
Vol 3 (Special Issue 7S) ◽  
pp. 20-24
Author(s):  
Prasanna Kumar T J ◽  
P Vamsi Raj Kumar ◽  
Md Saif ◽  
Sk Abdur Rehman ◽  
Md Abbas
Keyword(s):  
Thermal Analysis ◽  
Heat Flux ◽  
Steady State ◽  
Variable Thickness ◽  
Total Heat ◽  
Total Heat Flux ◽  
Fiber Metal Laminate ◽  
Fiber Metal

Thermal Modeling and Structural Analysis in Wire EDM Process for a 3D Model

2016 ◽  
Vol 852 ◽  
pp. 279-289
Author(s):  
Kasinath Das Mohapatra ◽  
Susanta Kumar Sahoo ◽  
Munmun Bhaumik
Keyword(s):  
Heat Flux ◽  
Structural Analysis ◽  
3D Model ◽  
Equivalent Stress ◽  
Total Heat ◽  
Work Piece ◽  
Wire Edm ◽  
Total Heat Flux ◽  
Machining Processes ◽  
Element Analysis

Wire EDM is one of the most non conventional machining processes used for cutting of different types of complex materials. Copper material in wire EDM has a wide application in several industries but its thermal and structural analysis in wire EDM has challenged the authors to model the work-piece and tools accurately using the software. The present work deals with the design of a 3 dimensional model of a work-piece material made of copper. The objective of the present work is to analyse the temperature, total heat flux and equivalent stress of the work-piece material using finite element analysis in ANSYS software. In the current work, a 3D model was designed with the Steady state thermal analysis and it was designed with the available experimental data using ANSYS workbench. The temperature and the total heat flux were calculated using this analysis. Another analysis is performed using Static structural to calculate the equivalent stress generated in the work-piece material using ANSYS. The model was developed for single spark only. Automated type of meshing and axi-symmetric type of geometry are considered for this experiment. The wire part is neglected and all the analysis is made on the work-piece only. XRD analysis is also performed on the work-piece material to know the crystallinity of the compound. Mesh Convergence test was also performed to determine the optimum solution for the requisite mesh. Finally the model was designed and various graphs were plotted for the temperature, total heat flux and equivalent stress of the material.

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