scholarly journals Comparison the Stiffened Plate Deflection of T and RSF Stiffeners on Marine Structure Subjected Force and Pressure

2020 ◽  
Vol 2 (3) ◽  
pp. Manuscript
Author(s):  
Ratthakrit Reabroy
Keyword(s):  
Equivalent Stress ◽  
Vertical Direction ◽  
Model Design ◽  
Stiffened Plate ◽  
Element Analysis ◽  
Marine Structure ◽  
Maximum Equivalent Stress ◽  
New Type ◽  
Double Hull ◽  
Oil Tanker

This work aims to compare deflection in the vertical direction between the perfect T- and RSF-stiffeners, which subjected by forces and pressures. The geometry of stiffener models have studied the conventional T-stiffeners model design as the actual double hull oil tanker and the RSF-stiffeners are new type design based on T-stiffener specifications. The deflection theories of simply supported beam were studied by double integral method and moment area method. Finite Element Analysis (FEA) is used to design and simulation the deflection in vertical direction and maximum equivalent stress of stiffeners after subjected force and pressure within the same boundary condition. All stiffener models are obtained and result from FEA are shown in linear and nonlinear curves. The verification between theoretical and FEA results are in agreement. The load-deflection curves are shown that the performance of all RSF-stiffeners are greater than the conventional T-stiffener. 

Optimization design of titanium alloy connecting rod based on structural topology optimization

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Bin Zheng ◽  
Yi Cai ◽  
Kelun Tang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Topology Optimization ◽  
Optimization Design ◽  
Equivalent Stress ◽  
Connecting Rod ◽  
Element Analysis ◽  
Content Type ◽  
The Finite Element Analysis ◽  
Maximum Equivalent Stress

Purpose The purpose of this paper is to realize the lightweight of connecting rod and meet the requirements of low energy consumption and vibration. Based on the structural design of the original connecting rod, the finite element analysis was conducted to reduce the weight and increase the natural frequencies, so as to reduce materials consumption and improve the energy efficiency of internal combustion engine. Design/methodology/approach The finite element analysis, structural optimization design and topology optimization of the connecting rod are applied. Efficient hybrid method is deployed: static and modal analysis; and structure re-design of the connecting rod based on topology optimization. Findings After the optimization of the connecting rod, the weight is reduced from 1.7907 to 1.4875 kg, with a reduction of 16.93%. The maximum equivalent stress of the optimized connecting rod is 183.97 MPa and that of the original structure is 217.18 MPa, with the reduction of 15.62%. The first, second and third natural frequencies of the optimized connecting rod are increased by 8.89%, 8.85% and 11.09%, respectively. Through the finite element analysis and based on the lightweight, the maximum equivalent stress is reduced and the low-order natural frequency is increased. Originality/value This paper presents an optimization method on the connecting rod structure. Based on the statics and modal analysis of the connecting rod and combined with the topology optimization, the size of the connecting rod is improved, and the static and dynamic characteristics of the optimized connecting rod are improved.

Finite Element Analysis of Hydraulic Clipping Machine Shear Platform Dased on ANSYS

2014 ◽  
Vol 945-949 ◽  
pp. 190-193
Author(s):  
Hai Lin Wang ◽  
Yi Hua Sun ◽  
Ming Bo Li ◽  
Gao Lin ◽  
Yun Qi Feng ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Elastic Strain ◽  
Optimization Design ◽  
Equivalent Stress ◽  
Element Model ◽  
Element Analysis ◽  
Maximum Equivalent Stress

Q43Y-85D type crocodile hydraulic clipping machine was taken as research object to optimization design. A finite element model for clipping machine was built using shell unit as fundamental unit. ANSYS12.0 finite element method was used to analyze the deformation and stress distribution of the shear platform model of hydraulic clipping machine. The result showed that the maximum equivalent stress at the dangerous area was 368.162 MPa and the maximum elastic strain was 0.1814×10-2 mm. After the structural optimization design, it was found that the maximum equivalent stress decreased to 186.238 MPa which did not exceed the material’s yield limitation 215 MPa and the maximum elastic strain decreased to 0.919×10-3 mm which satisfied the requirement of stiffness.

Influence on Fatigue and Biomechanics of Cone Fit of Dental Implant around the Surrounding Bone Tissue

2016 ◽  
Vol 872 ◽  
pp. 281-286
Author(s):  
Lei Liu ◽  
Xiao Zhang ◽  
Yu Feng Zhou ◽  
Xian Shuai Chen ◽  
Ya Ling Wang
Keyword(s):  
Bone Tissue ◽  
Dental Implant ◽  
Equivalent Stress ◽  
Load Force ◽  
Vertical Load ◽  
Vertical Cone ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Maximum Equivalent Stress ◽  
Surrounding Bone

In this paper, the purpose is to compare three different cone fit of dental implant around the surrounding bone tissue that influence on fatigue and biomechanics, it is also to provide a theoretical basis for the design and clinical application of dental implant. The method is that loading the force 100N and 200N with different angle to the three different cone with dental implant with the finite element analysis (FEA) that analyzes the stress and fatigue in ideal conditions. The Results is that when the loading is vertical, cone for 3 degrees of the implant have the best performance. The cone for 80 degrees of the implant is min among the max equivalent stress of the implants. However, comprehensive view, Cone for 24 degrees of the implant the most stable. we find that cone of different implant when subjected to the same force the maximum equivalent stress is different, smaller conical implant under vertical load force have good performance, but with the increase of the loading angle the bigger conical implant performance better.

The Structure Improvement Design of Turbodrill Diversion Liner

2012 ◽  
Vol 472-475 ◽  
pp. 688-691
Author(s):  
Xin Mei Yuan ◽  
Si Zhu Zhou ◽  
Tian Cheng Huang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Drilling Fluid ◽  
Equivalent Stress ◽  
Hole Drilling ◽  
Original Structure ◽  
Element Analysis ◽  
Safety Coefficient ◽  
Fillet Radius ◽  
Maximum Equivalent Stress

In order to improve the work life and reliability of turbodrill diversion liner, the parametric finite element model for turbodrill diversion liner is established by using finite element analysis software, and the result of finite element analysis is shown that the maximum equivalent stress is bigger and the work safety coefficient is low. On the basis of the result of finite element analysis and the characteristics of diversion liner, the improvement scheme is put forward and the finite element analysis is carried out. The analysis result shows that the fillet radius of diversion hole drilling fluid inlet has an importance impact on the maximum equivalent stress. When the fillet radius is 9 millimeter, the maximum equivalent stress is least, the maximum equivalent stress is reduced by 34.82% compared with the original structure, and the safety coefficient reached 1.772, and the results meet the design requirement.

Piston Engine Connecting Rod Transient Dynamic Finite Element Analysis and Maintenance Strategy

2014 ◽  
Vol 484-485 ◽  
pp. 272-276
Author(s):  
Fa Jun Ding
Keyword(s):  
Finite Element ◽  
Equivalent Stress ◽  
Fatigue Reliability ◽  
Connecting Rod ◽  
Piston Engine ◽  
Transient Dynamic Analysis ◽  
Element Analysis ◽  
Time Curve ◽  
Transient Dynamic ◽  
Maximum Equivalent Stress

Connecting rod is the very important connection and force bearing parts of piston engine crank mechanism; work in the role of various kinds of alternating stress. Taking a general rod from Lycoming IO-360-A1B6 aero-piston engine as the analysis object, first, a 3-D finite element model of the rod is established in ANSYS Workbench. And then, considering the influence of gas pressure in cylinder after ignition acting on the connecting rod under engines rated speed conditions, through the transient dynamic analysis, find in all load steps, the maximum equivalent stress occurred at the transition zone between the shaft and little head, and received the maximum equivalent stress versus time curve, to provide numerical basis for improving high-cycle fatigue reliability of the rod. Finally, according to equivalent stress contours of the rod when gas in cylinder peak pressure occurs, initially identified rods hazardous areas,to provide foundation for the development of standard repair process.

scholarly journals Deformation Investigations on the Flexspline with the Conic Curve Combined Cam Wave Generator

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Shuyan Wang ◽  
Dongxiang Guo ◽  
Shiteng Mao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Equivalent Stress ◽  
Mathematic Model ◽  
Transmission Efficiency ◽  
Experimental Results ◽  
Stress And Strain ◽  
Element Analysis ◽  
Wave Generator ◽  
Maximum Equivalent Stress

The deformation of the flexspline and the meshing quality are largely determined by the profile of a wave generator. The wave generator with a combined profile can effectively reduce or improve the deformation stress and strain of the flexspline for improving the transmission efficiency and reducing wear or noise. In this paper, in view of the facts that conic is originally cut out of the cone and different conic curves are easy to transform, a design concept of the curve cam wave generator based on the conic curve is proposed. Firstly, the combined principle, constraint conditions, and mathematic model of the curve cam generator based on the conic curve are established. Secondly, the deformation theory of the flexspline acted by the curve cam wave generator with conic curves has been developed, and finite element analysis on stress and strain of the flexspline compared with a standard elliptic wave generator has been carried out. Finally, a cam wave generator combined with the circle and ellipse as a sample has been developed and manufactured. Circumferential strain test has been further carried out by a static strain gauge to verify the strain characteristics of the flexspline acted with the circle and ellipse combined cam wave generator. The FEM results show that, in the meshing area of the flexspline, the maximum equivalent stress of the flexspline under the action of the arc and the ellipse wave generator is about 93 MPa, which is 36.3% lower than the maximum equivalent stress of the flexspline under the action of the standard ellipse which is 143 MPa. The experimental results show that the fitting curve of the experimental results fits well with the finite element analysis curve.

scholarly journals Study on Failure Analysis of Crankshaft Using Finite Element Analysis

2021 ◽  
Vol 335 ◽  
pp. 03001
Author(s):  
Yoon Zuan Ang ◽  
Pei Xuan Ku
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Dynamic Analysis ◽  
Fatigue Fracture ◽  
Combustion Engine ◽  
Equivalent Stress ◽  
Element Analysis ◽  
Maximum Equivalent Stress ◽  
Dynamic Loading Conditions

Crankshaft is one of the crucial parts for the internal combustion engine which required effective and precise working. In this study, the aim of the study is to identify the stress state in the crankshaft and to explain the failure in automotive crankshaft and fatigue life of crankshaft by using finite element analysis. The 3D solid modelling of the crankshaft model was designed and developed using SolidWorks. A static structural and dynamic analysis on an L-twin cylinder crankshaft were used to determine the maximum equivalent stress and total deformation at critical locations of the crankshaft. The model was tested under dynamic loading conditions to determine fatigue life, safety factor, equivalent alternating stress and damage using the fatigue tool. The results obtained from this study indicated that the crankshaft has obvious fatigue crack which was belongs to fatigue fracture. The fatigue fracture developed was only attributed to the propagating and initiate cracks on the edges of the lubrication hole under cyclic bending and torsion. Overall, the crankshaft is safe for both static and fatigue loadings. In dynamic analysis, the critical frequency obtained in the frequency response curve should be avoided which it may cause failure of the crankshaft.

STUDY ON FAILURE MODE OF HUSK MORTAR ENERGY-SAVING WALLBOARDS

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Yu Zhang ◽  
Qingwen Zhang ◽  
Jian Zhao ◽  
Guangchun Zhou
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Energy Saving ◽  
Failure Mode ◽  
Vertical Direction ◽  
Element Model ◽  
Displacement Curve ◽  
Element Analysis ◽  
New Type ◽  
The Finite Element Model

This paper focuses on husk mortar wallboard, which is a new type of energy-saving composite wallboard with new materials and complex working mechanism. There are eight total different dimensioned panels tested. Six of them are openings (window or door), with different opening rates; the other two are full panels with same dimensions. Based on the experimental data, they are analyzed under both horizontal and vertical direction loading, combined with the finite element analysis to reveal the working characteristics. The finite element model of husk mortar energy-saving wallboards is established by ANSYS software. Finally, the finite element results are compared with the experimental results from three aspects: ultimate load, failure mode and load displacement curve, which verifies the correctness of the finite element model.

Failure Analysis and Structure Improvement of Beam of Liner Vibrating Screen

2012 ◽  
Vol 619 ◽  
pp. 69-73 ◽  
Author(s):  
Cheng Long Li ◽  
Fan He ◽  
Ying Ying Zhang ◽  
Yang Gao ◽  
Peng Gao
Keyword(s):  
Large Scale ◽  
Equivalent Stress ◽  
Original Design ◽  
Beam Structure ◽  
Element Analysis ◽  
Harmonic Response ◽  
Vibrating Screen ◽  
Maximum Equivalent Stress ◽  
Structure Improvement ◽  
Improvement Scheme

Aiming at the frequently fracture happening in the large-scale liner vibrating screen beams, the software of finite-element analysis, ANSYS is used to analyze the modal and harmonic response of the beam structure. The analysis result suggests the danger area where beam is prone to fracture because of fatigue. The improvement scheme of the beam structure is proposed and a theoretical basis is provided for the same type of product design in the future. The failure form of the beam is fatigue failure. The maximum equivalent stress value of the improved beam structure comparing to the original design is decreased obviously, improving the stress state and the fatigue life and reliability of the liner vibrating screen.

Stress Distribution Around Maxillary Anterior Implants as a Factor of Labial Bone Thickness and Occlusal Load Angles: A 3-Dimensional Finite Element Analysis

2014 ◽  
Vol 40 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Marzieh Alikhasi ◽  
Hakimeh Siadat ◽  
Allahyar Geramy ◽  
Ahmad Hassan-Ahangari
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Strain Distribution ◽  
Equivalent Stress ◽  
Stress Strain ◽  
Element Analysis ◽  
Dental Practitioners ◽  
Maximum Equivalent Stress ◽  
Resultant Stress

The purpose of this study was to evaluate the influence of the stress/strain distribution in buccal bone of an anterior maxillary implant using 3 bone thicknesses under 5 different loading angles. Different testing conditions incorporating 3 buccal bone thicknesses, 3 bone compositions, and 5 loading angles of an anterior maxillary implant were applied in order to investigate the resultant stress/strain distribution with finite element analysis. The maximum equivalent stress/strain increased with the decreasing of loading angle relative to the long axis. In addition to loading angle, bone quality and quantity also influenced resultant stress distribution. Dental practitioners should consider combinations of bone composition, diameter, and load angulations to predict success or failure for a given implant length and diameter.

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