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.

Investigation of Material Properties of One-Piece Glass Fiber Post-and-Core Affecting Biomechanical Responses of the Restorative System

2010 ◽  
Vol 160-162 ◽  
pp. 1691-1698 ◽  
Author(s):  
Zhi Xin Huang ◽  
Cai Fu Qian ◽  
Peng Liu ◽  
Xu Liang Deng ◽  
Qing Cai ◽  
...  
Keyword(s):  
Shear Modulus ◽  
Young’S Modulus ◽  
Material Properties ◽  
Poisson’S Ratio ◽  
Young's Modulus ◽  
Equivalent Stress ◽  
Poisson's Ratio ◽  
Fiber Post ◽  
Maximum Deformation ◽  
Maximum Equivalent Stress

This study aimed at investigating the effects of the post material properties on the maximum stress in the root and maximum deformation of the restorative system. Effects of material properties of fiber post on the maximum equivalent stress in the root and the maximum deformation of the restorative system were numerically investigated. Results show that the maximum equivalent stress in the root can be decreased by 8.3% and the maximum deformation of the restorative system decreased by 10% compared with corresponding maximum values if changing Young’s modulus, Shear modulus and Poisson’s ratio in the range studied here. The maximum equivalent stress in the root is more sensitive to Young’s modulus and Poisson’s ratio while the deformation of the restorative system is more seriously affected by the Shear modulus of the post material.

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.

scholarly journals Optimization Design of Extrusion Roller of RP1814 Roller Press Based on ANSYS Workbench

2021 ◽  
Vol 11 (20) ◽  
pp. 9584
Author(s):  
Weihua Wei ◽  
Fangxu Peng ◽  
Yingli Li ◽  
Bingrui Chen ◽  
Yiqi Xu ◽  
...  
Keyword(s):  
Optimization Design ◽  
Equivalent Stress ◽  
Extrusion Force ◽  
Optimization Scheme ◽  
Direct Optimization ◽  
Roller Press ◽  
Maximum Deformation ◽  
Maximum Equivalent Stress ◽  
Strength And Deformation ◽  
Ansys Workbench

Firstly, the force of an extrusion roller under actual working condition was analyzed while the contact stress between the roller shaft and the roller sleeve and the extrusion force between the roller sleeve and the material were calculated. Secondly, static analysis of the extrusion roller was carried out using ANSYS software, and conclusively, the stress concentration appears at the roller sleeve’s inner ring step. Furthermore, an optimization scheme of the setting transition arc at the step of the contact surface between roller shaft and roller sleeve was proposed, and a simulation test was carried out., Finally, the maximum equivalent stress of the extrusion roller was set at the minimum value of the objective function; the extrusion roller was further optimized by using the direct optimization module in ANSYS Workbench. The results from optimization show that the maximum equivalent stress is reduced by 29% and the maximum deformation is decreased by 28%. It can be seen that the optimization scheme meets the strength and deformation requirements of the extrusion roller design. The optimization scheme can effectively improve the bearing capacity of the extrusion roller and reduce its production cost. This can provide a reference for the design of the roller press.

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.

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.

Static Stress and Modal Analysis of the Impeller of the High-Pressure Low-Flow Pump

2011 ◽  
Vol 117-119 ◽  
pp. 430-433
Author(s):  
Bao Liang Li ◽  
Heng Feng Zhang ◽  
Zang Lei
Keyword(s):  
Modal Analysis ◽  
Equivalent Stress ◽  
Great Influence ◽  
Low Flow ◽  
Interaction Technique ◽  
Maximum Deformation ◽  
Pressure Surface ◽  
Maximum Equivalent Stress ◽  
Structure Strength ◽  
Flow Pump

Based on the design conditions,the structure strength and modal analysis are carried on the impeller by One-way Fluid-structure Interaction technique in ANSYS Workbench platform. The results show that under the water stress, the maximum deformation occurs on the brink of the blade, the maximum equivalent stress occurs at the liner near the blade pressure surface, the deformation of the blade has a great influence on the vibration of the pump.

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.

Lower Bound Limit Load Determination: The mβ-Multiplier Method

2004 ◽  
Vol 126 (2) ◽  
pp. 237-240 ◽  
Author(s):  
R. Seshadri ◽  
H. Indermohan
Keyword(s):  
Lower Bound ◽  
Equivalent Stress ◽  
Limit Load ◽  
Oscillatory Behavior ◽  
Multiplier Method ◽  
Linear Elastic ◽  
Maximum Equivalent Stress ◽  
Determination Methods ◽  
Distribution Of Stress ◽  
Limited Accuracy

The existing lower bound limit load determination methods, that are based on linear elastic analysis such as the classical and mα-multiplier methods, have a dependence on the maximum equivalent stress. These methods are therefore sensitive to localized plastic action, which occurs in components with thin or slender construction, or those containing notches and cracks. Sensitivity manifests itself as relatively poor lower bounds during the initial elastic iterations of the elastic modulus adjustment procedures, or oscillatory behavior of the multiplier during successive elastic iterations leading to limited accuracy. The mβ-multiplier method proposed in this paper starts out with Mura’s inequality that relates the upper bound to the exact multiplier by making use of the “integral mean of yield.” The formulation relies on a “reference parameter” that is obtained from considering a distribution of stress rather than a single maximum equivalent stress. As a result, good limit load estimates have been obtained for several pressure component configurations.

Stress Analysis of Tubular Turbine Based on Fluid-Structure Coupling

2012 ◽  
Vol 190-191 ◽  
pp. 1261-1265
Author(s):  
Fu Xing Zhang ◽  
Yuan Zheng ◽  
Chun Xia Yang ◽  
Xiang Long Jin ◽  
Lin Ding
Keyword(s):  
Stress Concentration ◽  
Working Conditions ◽  
Guide Vane ◽  
Equivalent Stress ◽  
Outer Edge ◽  
Fluid Structure ◽  
Maximum Deformation ◽  
Water Head ◽  
Maximum Equivalent Stress ◽  
Maximum Water

A brief introduction of fluid-structure coupling and its classification were given, then according to the solving characteristics and application conditions of different coupling methods; sequential coupling method is chosen to calculate the stress distribution of a tide power plant tubular turbine. Stress calculations of the tubular turbine were conducted under the maximum water head, the designed water head, the average water head and the minimum water head working conditions in ANSYS Workbench. The research shows that in all of the four calculated working conditions, the maximum equivalent stress of the runner is located at the connection between the blades and the hub where stress concentration is obvious; the maximum deformation of the runner lies in the outer edge of the blades and the deformation increases from the root to the outer edge; the maximum equivalent stress of the guide vane is located at the root and the maximum deformation lies in the outer edge. The maximum value of maximum equivalent stress of the runner and the guide vane occurs on the maximum water head working condition, whereas it is far less than the material yield limit, which means that static stress will not lead to the cracks of the blade or the guide vane. But it is still necessary to avoid stress concentration appearing periodically in case it causes fatigue failure.

Lower Bound Limit Load Determination: The mβ-Multiplier Method

2003 ◽  
Author(s):  
R. Seshadri ◽  
H. Indermohan
Keyword(s):  
Lower Bound ◽  
Equivalent Stress ◽  
Limit Load ◽  
Oscillatory Behavior ◽  
Multiplier Method ◽  
Linear Elastic ◽  
Maximum Equivalent Stress ◽  
Determination Methods ◽  
Distribution Of Stress ◽  
Limited Accuracy

The existing lower bound limit load determination methods that are based on linear elastic analysis such as the classical and mα-multiplier methods have a dependence on the maximum equivalent stress. These methods are therefore sensitive to localized plastic action, which occurs in components with thin or slender construction, or those containing notches and cracks. Sensitivity manifests itself as relatively poor lower bounds during the initial elastic iterations of the elastic modulus adjustment procedures, or oscillatory behavior of the multiplier during successive elastic iterations leading to limited accuracy. The mβ-multiplier method proposed in this paper starts out with Mura’s inequality that relates the upper bound to the exact multiplier by making use of the “integral mean of yield.” The formulation relies on a “reference parameter” that is obtained by considering a distribution of stress rather than a single maximum equivalent stress. As a result, good limit load estimates have been obtained for several pressure component configurations.

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