The structural optimization of roadheader conical picks based on fatigue life

2018 ◽  
Vol 09 (02) ◽  
pp. 1850013 ◽  
Author(s):  
Zhenguo Lu ◽  
Lirong Wan ◽  
Qingliang Zeng ◽  
Xin Zhang ◽  
Kuidong Gao
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Static Analysis ◽  
Element Model ◽  
Cutting Resistance ◽  
Strength Failure ◽  
New Type ◽  
Conical Picks ◽  
Fatigue Life Analysis ◽  
The Finite Element Model

Conical picks are the key cutting components used on roadheaders, and they are replaced frequently because of the bad working conditions. Picks did not meet the fatigue life when they were damaged by abrasion, so the pick fatigue life and strength are excessive. In the paper, in order to reduce the abrasion and save the materials, structure optimization was carried out. For static analysis and fatigue life prediction, the simulation program was proposed based on mathematical models to obtain the cutting resistance. Furthermore, the finite element models for static analysis and fatigue life analysis were proposed. The results indicated that fatigue life damage and strength failure of the cutting pick would never happen. Subsequently, the initial optimization model and the finite element model of picks were developed. According to the optimized results, a new type of pick was developed based on the working and installing conditions of the traditional pick. Finally, the previous analysis methods used for traditional methods were carried out again for the new type picks. The results show that new type of pick can satisfy the strength and fatigue life requirements.

Multi-Fidelity Surrogate Model-Assisted Fatigue Analysis of Welded Joints

2020 ◽  
Author(s):  
Lili Zhang ◽  
Tingli Xie ◽  
Jiexiang Hu ◽  
Ping Jiang ◽  
Jasuk Koo ◽  
...  
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Stress Distribution ◽  
Finite Element Model ◽  
Surrogate Model ◽  
Element Model ◽  
Leg Length ◽  
Verification Method ◽  
Leave One Out ◽  
The Finite Element Model

Abstract In this study, an additive scaling function based multi-fidelity (ASF-MF) surrogate model is constructed to fast predict fatigue life as well as the stress distribution for the welded single lap joint. The influence of leg length, leg height, the width of the specimen and load in the fatigue test are taken into consideration. In the construction of the MF surrogate model, the finite element model that is calibrated with the experiment is chosen as the high-fidelity (HF) model. While the finite element model that is not calibrated with the experiment is considered as the low-fidelity (LF) model, aiming to capture the trend of the HF model. The Leave-one-out (LOO) verification method is utilized to compare the prediction performance of the ASF-MF surrogate model with that of the single-fidelity Kriging surrogate model. Results show that the ASF-MF surrogate model can better predict the fatigue life as well as the stress distribution.

Design and Fatigue Life Analysis of a Motorcycle Frame

2014 ◽  
Author(s):  
Massimiliano Gobbi ◽  
Giorgio Previati ◽  
Giampiero Mastinu
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Finite Element Model ◽  
Experimental Tests ◽  
Element Model ◽  
Fe Model ◽  
Static Test ◽  
Weld Toe ◽  
Fatigue Life Analysis ◽  
Motorcycle Frame

An off-road motorcycle frame has been analyzed and modified to optimize its fatigue life. The fatigue life of the frame is very important to define the service life of the motorcycle. The strain levels on key parts of the frame were collected during experimental tests. It has been possible to locate the areas where the maximum stress level is reached. A finite element (FE) model of the frame has been developed and used for estimating its fatigue life. Static test bench results have been used to validate the FE model. The accuracy of the finite element model is good, the errors are always below 5% with respect to measured data. The mission profile of the motorcycle is dominated by off-road use, with stress levels close to yield point, so a strain-life approach has been applied for estimating the fatigue life of the frame. Particular attention has been paid to the analysis of the welded connections. A shell and a 3D FE model have been combined to simulate the stress histories at the welds. Two reference maneuvers have been considered as loading conditions. The computed stresses have been used to assess the life of the frame according to the notch stress approach (Radaj & Seeger). The method correlates the stress range in a idealized notch, characterized by a fictitious radius in the weld toe or root, to the fatigue life by using a single S-N curve. New technical frame layouts have been proposed and verified by means of the developed finite element model. The considered approach allows to speed up the design process and to reduce the testing phase.

Instantaneous Dynamic Analysis of the New Stirring Kneader Shaft

2011 ◽  
Vol 221 ◽  
pp. 472-477
Author(s):  
Zhi Min Fan ◽  
Guang Ting Zhou ◽  
Jian Ping Liu
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Dynamic Response ◽  
Finite Element Model ◽  
Dynamic Analysis ◽  
Structural Parameters ◽  
Element Model ◽  
Fatigue Analysis ◽  
Exciting Force ◽  
The Finite Element Model

The finite element model of the stirring kneader shaft was built by PRO/E software, which was inserted into ANSYS. Next, the instantaneous dynamic analysis of the new stirring kneader shaft was carried out. The instantaneous dynamic response of stirring shaft about the exciting force of fluid was obtained, which was to optimize the structural parameters of the stirring shaft. The foundation for the next fatigue analysis was laid based on the instantaneous dynamic response; the fatigue life of stirring kneader shaft can be predicted.

Fatigue Strength and Modal Analysis of S195 Engine Crankshaft

2011 ◽  
Vol 120 ◽  
pp. 81-84
Author(s):  
Jian Hua Wang ◽  
Jian Hua ◽  
Chao Li
Keyword(s):  
Finite Element ◽  
Fatigue Strength ◽  
Finite Element Model ◽  
Modal Analysis ◽  
Static Analysis ◽  
Element Model ◽  
Fatigue Analysis ◽  
Fatigue Rupture ◽  
Engine Crankshaft ◽  
The Finite Element Model

Fatigue rupture is the major reason of crankshaft parts failure. Traditional fatigue analysis is fairly complicated and causes a great error. The finite element model of s195 engine crankshaft is created under SolidWorks environment, whose static analysis and fatigue analysis is carried out by using Simulation module. Also the vibration character of the crankshaft is calculated through modal analysis. Result shows the fatigue strength of the crankshaft is enough and it will not produce resonance in operation.

Strength Safety Coefficient and Fatigue Life Analysis of Coupling Diaphragm Based on FE-Simulation

2014 ◽  
Vol 541-542 ◽  
pp. 569-573 ◽  
Author(s):  
Zhong Ke Tian ◽  
Chao Yin ◽  
Fa He Yang
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Fe Simulation ◽  
Equivalent Stress ◽  
Strength Criterion ◽  
Element Model ◽  
Safety Coefficient ◽  
Life Analysis ◽  
Fatigue Life Analysis ◽  
Stress Fatigue

Based on average loading assumption, a non-linear contact finite element model of coupling triple-diaphragm assembly configuration is established. In accordance with the result of diaphragm equivalent stress, the yield strength criterion and high cycle-stress fatigue life norm are adopted to calculate strength safety coefficient and fatigue life of coupling diaphragm. The durability of coupling diaphragm is proved enough numerically.

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.

Structural Design and Analysis on Frame of Blueberry Harvesters Based on ANSYS

2010 ◽  
Vol 26-28 ◽  
pp. 794-799
Author(s):  
Qian Wang ◽  
Zhi Peng Li ◽  
Dao Qiang Wang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Static Analysis ◽  
Working Conditions ◽  
Structural Design ◽  
Mechanical Characteristics ◽  
Element Model ◽  
Frame Structure ◽  
Ansys Software ◽  
The Finite Element Model

The frame of blueberry harvesters is quite different from other vehicles. In this article, the design for whole frame structure is elaborated. According to the mechanical characteristics of the frame, materials are selected and manufacturability requirements are limited. Based on PRO/E software, accurate model of the frame of blueberry harvesters is established. And then, on the basis of ANSYS software, the finite element model of frame of blueberry harvesters is established to carry out static analysis on full-loaded and distortion working conditions. Results meet the strength requirements and displacement requirements, so it verifies the reasonableness of the design of frame.

Research on Design of Neotype Wire Rope Safety Barrier

2011 ◽  
Vol 255-260 ◽  
pp. 4150-4154
Author(s):  
Chen Chen Chen ◽  
Mu Xi Lei ◽  
Zheng Bao Lei ◽  
Yong Han Li ◽  
Xin Chao Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Wire Rope ◽  
Crash Test ◽  
Safety Barrier ◽  
New Type ◽  
Simulation Results ◽  
Equivalent Method ◽  
The Finite Element Model

In order to research and develop a suitable wire rope safety barrier for our country, which will be used as the highway flexible safety barrier for two model demonstrative project of science and technology of Changsha-Xiangtan Highway, the paper presents a new type of wire rope safety barrier, by way of designing the shape of the post, the diameter of the rope, the arrangement and the number of ropes etc., on the basis of the form of structure of the most advanced foreign existing wire rope safety barrier — BRIFEN. The first part is devoted to prove the reliability of the finite element simulation, by comparing the simulation results of the finite element model of BRIFEN with the collision test data, which is published by U.S. Federal Highway Administration. After discussion and analysis, the neotype wire rope safety barrier, which has many posts with C-shaped cross section and 5 ropes, is invented with the post equivalent method. The finite element model of the neotype barrier is established and simulated to determine the dimension of the post. The simulation results achieve the design objective that the maximum dynamic deformation is less than 1.2m when the barrier is impacted by the 10 tons of bus in the speed of 60 kilometers per hour, and provide an important reference for Vehicle Crash Test.

Dynamic Analysis of Cross Simulator

2011 ◽  
Vol 52-54 ◽  
pp. 1698-1702
Author(s):  
Xu Dong Yang ◽  
Liang Liang Jin ◽  
Jia Chun Li ◽  
Zhi Qiang Jin ◽  
Jin Zhao
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Dynamic Analysis ◽  
Static Analysis ◽  
Dynamic Characteristics ◽  
Impact Load ◽  
Element Model ◽  
Explicit Method ◽  
Set Up ◽  
The Finite Element Model

The finite element model of cross simulator including supporting structure, beam, etc. was set up in the environment of ABAQUS. After the static analysis which meets the requirements, the model’s dynamic characteristics when bearing impact load was obtained using explicit method according to modal analysis results. Comparing different analysis results with technical index, it indicates that larger impact load makes the dynamic characteristics worse significantly.

The Finite Element Analysis and Topology Optimization of Semi-Trailer Frame

2012 ◽  
Vol 424-425 ◽  
pp. 90-93
Author(s):  
Wei Chun Zhang ◽  
Xian Bin Du ◽  
Bing Bing Ma ◽  
Bao Hao Pei ◽  
Jie Chen ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Topology Optimization ◽  
Static Analysis ◽  
Element Model ◽  
Operating Conditions ◽  
Element Analysis ◽  
And Topology ◽  
The Finite Element Analysis ◽  
The Finite Element Model

Create the finite element model of the frame in ANSYS, and then apply the corresponding boundary conditions and loads for static analysis under the two typical operating conditions of the bending and twisting. And then identify the part suffered a relatively bigger stress in the frame by analyzing the results to verify whether it meets the requirements of its strength. Finally, make a preliminary topology optimization for the frame

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