Fatigue Strength Simulation of Boom System Structure of Pump Truck

2011 ◽  
Vol 101-102 ◽  
pp. 500-507
Author(s):  
Bin Hua Wang ◽  
Peng Min Lu ◽  
Yu Hong Shao
Keyword(s):  
Finite Element ◽  
Fatigue Strength ◽  
Element Model ◽  
System Structure ◽  
Design Calculation ◽  
Matlab Simulation ◽  
Strength Assessment ◽  
History Of ◽  
Dip Angle ◽  
Set Up

The motion equation of boom system of pump truck carrying concrete flow is set up based on the coupled vibration theory of cantilevered pipe and the finite element theory. Dynamic stress history of boom system with parameters of dip angle α=0°is simulated combining MATLAB simulation analyses with ANSYS finite element model. The feasibility of this method is verified through field experiment. Stress histories are simulated by adjusting parameter of dip angle as follows: α=20°,52°and 80°.Great stress points are painted on the Goodman Fatigue Limit Diagram measured by experiment. And then fatigue strength assessment of boom system is done. The research method can be used for the design calculation of similar products.

Finite Element Model of Human Cochlea Considering of the Helicotrema Size

2013 ◽  
Vol 456 ◽  
pp. 576-581 ◽  
Author(s):  
Li Fu Xu ◽  
Na Ta ◽  
Zhu Shi Rao ◽  
Jia Bin Tian
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Basilar Membrane ◽  
Round Window ◽  
Element Model ◽  
Oval Window ◽  
Fe Model ◽  
Cochlear Duct ◽  
Human Cochlea ◽  
Set Up

A 2-D finite element model of human cochlea is established in this paper. This model includes the structure of oval window, round window, basilar membrane and cochlear duct which is filled with fluid. The basilar membrane responses are calculated with sound input on the oval window membrane. In order to study the effects of helicotrema on basilar membrane response, three different helicotrema dimensions are set up in the FE model. A two-way fluid-structure interaction numerical method is used to compute the responses in the cochlea. The influence of the helicotrema is acquired and the frequency selectivity of the basilar membrane motion along the cochlear duct is predicted. These results agree with the experiments and indicate much better results are obtained with appropriate helicotrema size.

Study on the Prediction of Drilling Forces on Cortical Bone Based on Finite Element Simulation

2013 ◽  
Vol 589-590 ◽  
pp. 157-162
Author(s):  
Ya Hui Hu ◽  
Qing Yun Zhang ◽  
Xiao Yu Yue
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Feed Rate ◽  
Orthogonal Experiment ◽  
Element Model ◽  
Drilling Speed ◽  
Drilling Force ◽  
Drill Diameter ◽  
Potential Damage ◽  
Set Up

The changes of drilling forces during bone drilling provide a useful index for evaluating the risk of potential damage to the bone. The aim of the work is that an elastic-plastic dynamic finite element model is used to simulate the process of a drill bit drilling through the bone. The finite element model was set up in the Abaqus6.11; the prediction model of the drilling force was gotten by using the regression orthogonal experiment and data processing software Matlab7.0. Diverse values of drilling speed, feed rate and drill diameter are important factors which will lead to changes in the drilling forces. By controlling the drilling parameters can obtain the optimal drilling force. The results show that the diameter has the greatest influence on the drilling force, the drilling speed the second, the feed rate the last.

Finite Element Analysis and Topology Optimization of the Clamping Unit in a Two-Platen Injection Machine

2011 ◽  
Vol 117-119 ◽  
pp. 1535-1542 ◽  
Author(s):  
Hua Wei Zhang ◽  
Wei Xia ◽  
Zhi Heng Wu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Topology Optimization ◽  
Element Model ◽  
Molding Machine ◽  
Element Analysis ◽  
And Topology ◽  
The Finite Element Analysis ◽  
Set Up ◽  
The Finite Element Model

In this paper, the clamping unit of a two-platen injection molding machine was modeled by Pro/ENGINEER, and was imported to Altair HyperWorks. In HyperMesh module, the finite element model was set up, ANSYS has been used in the finite element analysis of the clamping unit and the deformation and stress results were obtained. Based on the topology optimization of HyperWorks/OptiStruct, recommendations to improve the structure of the clamping mechanism are presented; the results showed that less material was used while its performance was maintained.

Nonlinear Finite Element Analysis and Experimental Study of Leaf Spring Suspension

2011 ◽  
Vol 63-64 ◽  
pp. 478-481
Author(s):  
Jin Sheng Qiu ◽  
Jie Meng
Keyword(s):  
Finite Element ◽  
Testing Machine ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Leaf Spring ◽  
Design Calculation ◽  
Element Analysis ◽  
Universal Testing ◽  
Spring Suspension ◽  
Element Theory

By the universal testing machine and special fixture, the leaf spring suspension was tested for deformation, and based on nonlinear finite element theory, the suspension was analyzed. The calculation result is coinciding with test result.The finite element model established could be applied to design calculation and parameter optimization of leaf spring suspension.

Modeling Analysis and Experimental Study of Circular Piezoelectric Unimorph Actuator

2014 ◽  
Vol 599-601 ◽  
pp. 992-996
Author(s):  
Guo Jun Liu ◽  
Xue Lu Yang ◽  
Xu Hao Yang ◽  
Tian Zhao ◽  
Zhi Gang Yang ◽  
...  
Keyword(s):  
Finite Element ◽  
Performance Testing ◽  
Element Model ◽  
Edge Condition ◽  
Coupling Condition ◽  
Pzt Actuator ◽  
Modeling Analysis ◽  
Impedance Testing ◽  
Set Up ◽  
Piezoelectric Unimorph

The finite element model of a circular piezoelectric (PZT) unimorph actuator is set up, the static and dynamic characteristic of the circular PZT actuator are analyzed. For the investigated PZT actuator, comprehensive performance testing is carried out. Compared the simulation results of finite element method with experimental data, the central deflections of PZT actuator under the DC condition are same basically, the testing results show that the actual edge condition lies between clamped and pinned support. The impedance testing results of PZT actuators agree well with FEM analyses. Under AC condition, the central displacement which involves part of resonant component increases greatly by several times more than that under DC condition. While the displacement of actuator with resistance decreases greatly, and is slightly lower than that under DC condition. The relevant research methods lay foundation for the further study of PZT actuator under multi-field coupling condition. Key words: PZT actuator; Circular PZT unimorph; FEM; Static; Dynamic

Modal Analysis of Two Wheels Scooter Based on Solidworks

2014 ◽  
Vol 960-961 ◽  
pp. 1420-1423
Author(s):  
Zhi Dong Huang ◽  
Guo Fei Li ◽  
Juan Cong ◽  
Yun Wang ◽  
Wei Na Yu ◽  
...  
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Three Dimensional ◽  
Element Model ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Dynamic Design ◽  
Driving System ◽  
Set Up ◽  
The Finite Element Model

Based on Solidworks software, the three-dimensional model of two wheels scooter is set up. The finite element model of two wheels scooter is generated. Modal analysis of driving system and telescopic mechanism of bar on two wheels scooter is investigated. The first five orders natural frequency and major modes of driving system and telescopic mechanism of bar are clarified. The method and the result can be used as a reference of dynamic design and lay foundation for calculation and analysis of dynamic response for the two wheels scooter.

Numerical Simulation Analysis of Deformation in TIG Welding of I-Steel

2011 ◽  
Vol 189-193 ◽  
pp. 2196-2199
Author(s):  
Ling Li Meng ◽  
Yan Qun Huang ◽  
Ming Liu
Keyword(s):  
Finite Element ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Element Model ◽  
Welding Parameters ◽  
Gas Tungsten Arc ◽  
Dimensional Finite Element ◽  
Welding Sequences ◽  
Set Up ◽  
Three Dimensional Finite Element

Since it is inconsistent and uncontrollable in the experiment, any variance in specimen dimensions, welding parameters and testing conditions will influence the consistency of testing results to some extent. In this paper, the Finite Element Method(FEM) is employed to solve this problem. A three-dimensional finite element model is established to simulate the deformation of I-steel during gas tungsten arc welding (TIG) with FEM software, which is set up to analysis the deformation of I-steel with different welding sequences.

Performance of Soil Pressure on the Culvert under High-Backfill Reinforced with Geosynthetics

2011 ◽  
Vol 368-373 ◽  
pp. 1955-1960
Author(s):  
Hong Wei Wei ◽  
Xiao Li Yang ◽  
Ze Hong Yu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Load Reduction ◽  
Soil Pressure ◽  
Soil Load ◽  
Set Up ◽  
The One ◽  
Design And Construction

Finite element model of culvert under high-backfill reinforced with Geosynthetics was set up to calculate the soil pressures on culvert and the effects of load reduction by reinforcement were analyzed in the paper. Results showed that the soil load on culvert under embankment reinforced with geosynthetics was reduced significantly compared with the one under unreinforced embankment, the reduction effects were related with reinforcement layers and space. With increasing layers the soil load reduced, but the amount of reduction seemed out of proportion to the layer increasing, to some extent the layers will contributed only a little to the load reduction. Comparatively, the reduction effects enhanced remarkably with space of reinforcement. Results will benefit to design and construction of engineering.

Finite Element Analysis on Causes of Crack in Large Underground Garage

2014 ◽  
Vol 580-583 ◽  
pp. 1369-1376
Author(s):  
Bin Shu ◽  
Jian He Peng
Keyword(s):  
Finite Element ◽  
Poisson Ratio ◽  
Expansive Soil ◽  
Element Model ◽  
Underground Water ◽  
Element Analysis ◽  
Foundation Soil ◽  
Finite Element Software ◽  
Crack Problems ◽  
Set Up

The paper aims to solve the serious and regular crack problems in underground garage. ANSYS finite element software is applied to set up the overall finite element model on floor-foundation and foundation coupling beam-foundation soil in underground garage. Combined with engineering field detection, factors influencing underground garage floor like underground water level, soil expansion caused by water content change in expansive soil, soil poisson ratio, foundation settlement are taken into consideration to find out the causes of cracks. The study is expected to provide reference for similar cases in other projects.

Ultimate Strength Assessment of Semi-Submersible Platform Under Different Load Conditions

2017 ◽  
Author(s):  
Yangzhe Yu ◽  
Guoqing Feng ◽  
Huilong Ren
Keyword(s):  
Finite Element ◽  
Ultimate Strength ◽  
High Stress ◽  
Initial Imperfection ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Main Bearing ◽  
Strength Assessment ◽  
Hull Structure ◽  
Load Conditions

The nonlinear finite-element method has been widely used in evaluating the ultimate strength of stiffened plates and part of hull girders, considering the effect of boundary conditions, geometrical initial imperfection and welding-induced residual stress in recent years. However, available research on the ultimate strength of large-sized structures, especially of semi-submersible platform is limited. New large-sized semi-submersible platform has been designed with lateral brace structure and square cross-section columns. The investigation of ultimate strength of the whole structure is of paramount importance in assessing the safety and design of such large structure. Therefore, in this paper, a three-dimensional nonlinear finite element model was developed to investigate the ultimate strength of a new generation of semi-submersible platform under different load conditions and its behavior after collapse using explicit dynamic solvers. Results showed that the time dependent dynamic explicit method was reliable and feasible for the calculation of ultimate strength of such complicated structure. For the target platform, the bracings and upper hull structure were the main bearing component and were critical for the ultimate strength of the whole structure. High stress occurred in connection areas and special attention shall be paid for.

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