Optimal Design of Computerized Flat Knitting Machine Cam Curves Based on UG and ANSYS/LS-DYNA

2014 ◽  
Vol 529 ◽  
pp. 410-414
Author(s):  
Cang Zhao ◽  
Guang Li Song ◽  
Lei Xu
Keyword(s):  
Finite Element ◽  
Optimal Design ◽  
Dynamic Analysis ◽  
Maximum Stress ◽  
Analysis Software ◽  
Forming Process ◽  
Polynomial Curve ◽  
Circular Arcs ◽  
Design Software ◽  
Straight Lines

By combining the industrial design software UG and finite element dynamic analysis software ANSYS/LS-DYNA, the paper respectively designs the non-linear knitting cams with polynomial curves, and simulates the loop-forming process in the interaction between the cams and needles. Based on comparative analyses, it’s thereby concluded that the polynomial curve has the best performance and is significantly superior to the cam curve composed of straight-lines and circular-arcs; the elements with higher stresses are located above the butt of needle jack and the joint of the jack and latch needle; and the polynomial curve is effective in lowering the maximum stress of the needle.

Finite Element Simulation of Vacuum Hot Bulge Forming of Titanium Alloy Cylindrical Workpiece

2011 ◽  
Vol 675-677 ◽  
pp. 921-924 ◽  
Author(s):  
Ming Wei Wang ◽  
Chun Yan Wang ◽  
Li Wen Zhang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Titanium Alloy ◽  
Finite Element Simulation ◽  
Process Parameters ◽  
Fe Model ◽  
Analysis Software ◽  
Forming Process ◽  
Element Simulation ◽  
Cylindrical Workpiece

Vacuum hot bulge forming (VHBF) is becoming an increasingly important manufacturing process for titanium alloy cylindrical workpiece in the aerospace industries. Finite element simulation is an essential tool for the specification of process parameters. In this paper, a two-dimensional nonlinear thermo-mechanical couple FE model was established. Numerical simulation of vacuum hot bulge forming of titanium alloy cylindrical workpiece was carried out using FE analysis software MSC.Marc. The effects of process parameter on vacuum hot bulge forming of BT20 titanium alloy cylindrical workpiece was analyzed by numerical simulation. The proposed an optimized vacuum hot bulge forming process parameters and die size. And the corresponding experiments were carried out. The simulated results agreed well with the experimental results.

ST14 Material Stamping Process Applications of Finite Element Analysis

2013 ◽  
Vol 711 ◽  
pp. 214-218
Author(s):  
Xiao Jiang Yuan ◽  
Qiu Ju Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Material Structure ◽  
Analysis Software ◽  
Forming Process ◽  
Element Analysis ◽  
Stamping Process ◽  
Back Door ◽  
Material Forming ◽  
Process Structure

ST14 material around the back door window frames of the front bracket parts for the carrier, and to AutoForm stamping process finite element analysis software as a platform for ST14 experience of the material structure process simulation of material forming process, the analysis of the parts stamping process defects through repeated amendments of Part Process structure, to achieve the purpose of stamping process defects.

Finite Element Static and Dynamic Analysis for a Piston

2010 ◽  
Vol 97-101 ◽  
pp. 3323-3326 ◽  
Author(s):  
Yan Xia Wang ◽  
Yong Qi Liu ◽  
H.Y. Shi
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Maximum Stress ◽  
Fatigue Testing ◽  
Coupling Condition ◽  
Fuel Gas ◽  
Mechanical Coupling ◽  
Static And Dynamic Analysis ◽  
Mechanical Fatigue ◽  
Testing Method

Piston is one of the most stressed components of an engine. In this paper, a 1/2 3-D solid model of a new designed piston was built by using ANSYS software. The stable stress distribution and the deformation under the thermo-mechanical coupling condition were firstly calculated. Calculating results indicates that the maximum stress concentration is at the upper end of piston pin boss inner hole, and is mainly caused by the peak pressure of the fuel gas. Then the finite element dynamic analysis was conducted based on the mechanical fatigue testing method, and the mechanical fatigue life-span was calculated. All these work indicate that the design of the piton is reasonable.

Multibody Dynamic Analysis of Automobile Wiper Based on Virtual Prototype

2011 ◽  
Vol 58-60 ◽  
pp. 1608-1613
Author(s):  
Gang Huang ◽  
Yuan Ming Long ◽  
Jin Hang Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Analysis ◽  
Virtual Environment ◽  
Mechanical Engineering ◽  
Virtual Prototype ◽  
Virtual Model ◽  
Analysis Software ◽  
Element Analysis ◽  
Multibody Dynamic

Virtual prototype plays an important role in agile designing and manufacturing. Finite Element Analysis and multibody analysis software can also assist engineers with developing and analyzing sophisticated machines. In this paper, a virtual model of an automobile wiper is modeled and used to be simulated under virtual environment of ADAMS, which is a famous tool in mechanical engineering. After simulation, the vibration and noise that the wiper works with have been found and some suggestions are given in discussion and conclusion.

Numerical Simulation of Liner Curvature Radius on Formation of LEFP

2014 ◽  
Vol 941-944 ◽  
pp. 2305-2308 ◽  
Author(s):  
Rui Jun Gou
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Small Radius ◽  
Curvature Radius ◽  
Arbitrary Lagrangian Eulerian ◽  
Analysis Software ◽  
Forming Process ◽  
Element Analysis ◽  
Charge Structure

In order to obtain a linear explosively formed projectile (LEFP) with a good flying form under large stand-off, the LS-Dyna finite element analysis software and arbitrary Lagrangian - Eulerian (ALE) algorithm were used to simulate the forming process of LEFP with a 30mm charge structure diameter. On the basis of that, the only changed factor was the curvature radius of the liner which was selected as 0.65D, 0.75D, 0.85D, 1.0D and 1.1D for the simulation of LEFP forming progress. The warhead speed-time curves and fracture surfaces of the LEFP are analyzed, with liner radius decreasing, the projectiles become more slender, and instead, the larger radius liner forms flat and wide LEFP. Slender LEFP is conductive to penetration, however the over small radius which cause the reduction of weight and kinetic energy makes fracture easily, oversize radius influence either end of LEFP that warps upward seriously , what means speed grads of both ends differ greatly .The suitable radius ranges from 0.75D to 1.0D.

Force Analysis and Optimal Design of Propeller for Garbage Powder Mixer

2011 ◽  
Vol 422 ◽  
pp. 438-442
Author(s):  
Mei Fa Huang ◽  
Wei Zhao Luo ◽  
Guang Qian
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Design ◽  
Stress Analysis ◽  
Maximum Stress ◽  
Working Condition ◽  
Force Analysis ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Simulation Results

Propeller is one of the critical parts in garbage powder mixer and affect significantly to the performance. In order to obtain a more reasonable structure, force analysis and stress analysis is carrier out for the propeller based on the actual working condition. Optimal design for the propeller is implemented by the results of stress analysis. To verify the rationality and feasibility of this mechanism, the finite element analysis for the propeller is performed by using the ANASYS software. The simulation results show that the maximum stress of the propeller is on the joint of blade and rod. The optimized propeller is satisfied with the strength requirements.

Parametric Modeling and Finite Element Analysis of the Extruder Key Components Based on Pro/E and ANSYS

2012 ◽  
Vol 466-467 ◽  
pp. 572-576
Author(s):  
Hong Li Wang ◽  
Yue Shao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Design ◽  
Stress Analysis ◽  
Parametric Design ◽  
Parametric Modeling ◽  
Element Analysis ◽  
Design Requirements ◽  
Design Software

The extruder key components consist of extrusion-screw, sleeve and nozzle. Its structure and size decides extrusion effects of the extruder, even to the capability of the whole machine. In this paper, the 3D entity modeling of the extruder key components were established by using the parametric design software of Pro/Engineer, then it was transferred into data that will be used in finite element analysis. The stress analysis was carried out by ANSYS which software of finite element analysis. The results showed that strength of the extrusion-screw, sleeve and nozzle meet the design requirements. Parametric modeling and finite element analysis was the effective way for optimal design of the extruder.

An Efficient Time Domain Code for Strength and Fatigue Analysis of Steel Catenary Risers

2015 ◽  
Author(s):  
Djoni E. Sidarta ◽  
Xiaoning Jing ◽  
Kostas F. Lambrakos ◽  
Roger W. Burke ◽  
William C. Webster
Keyword(s):  
Time Series ◽  
Finite Element ◽  
Dynamic Analysis ◽  
Time Domain ◽  
Fatigue Analysis ◽  
Strength Analysis ◽  
Analysis Software ◽  
Finite Element Program ◽  
Element Program ◽  
Steel Catenary Risers

Steel Catenary Risers (SCRs) are commonly used in the offshore industry. Strength and fatigue performance of SCRs due to waves, currents and vessel motions is typically calculated using time domain dynamic analysis. Strength analysis may involve a large number of load cases for different environments, riser conditions and vessel configurations. Fatigue analysis may involve computation of riser response for hundreds of fatigue sea-states. It is very important for project schedule and cost that the analysis software used is both accurate and computer efficient. This paper presents RodDyn as an alternative time domain analysis tool for SCR strength and fatigue analysis. RodDyn is a finite element program for dynamic analysis of single-pipe risers. Several publications on this program are available in the literature. The results of dynamic analysis of an SCR for strength and fatigue from RodDyn are compared against the results from ABAQUS. ABAQUS is a general finite element program that has been widely used in the offshore exploration and production industry and has been considered one of the standard finite element programs. Riser dynamic analysis uses time series of vessel motions due to metocean environments at an oblique angle to the plane of the SCR. Von Mises stress per API RP 2RD, strength checks per API STD 2RD and fatigue damage along the riser are presented for both RodDyn and ABAQUS. Time series of effective tension and bending moments at selected locations on the riser are also compared. The main advantage of using RodDyn for riser analysis is the speed of computation. This paper shows that RodDyn can deliver significant gains in computational speed compared to standard riser analysis software programs without sacrificing accuracy of the computed results.

Finite Element Analysis and Optimal Design for Mold Shelf of Powder Molding Press

2010 ◽  
Vol 34-35 ◽  
pp. 1559-1562
Author(s):  
Jun Liu ◽  
Xiao Zhou ◽  
Gang Yi Zhou ◽  
Xin Long Dong
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Design ◽  
Load Distribution ◽  
Maximum Stress ◽  
Ansys Software ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Load Component ◽  
Main Support

Mold shelf of powder molding press(PMP) is the main load component. Control the deformation of mold shelf is a key problem. In this paper, based on the basic theory of finite element analysis(FEA), the constraints and load conditions of main support parts of mold shelf were simulated and analyzed . ANSYS software optimized the structure of mold shelf. Top width of the stress part increased to 15mm, its height from 80mm down to 50mm. The results showed that the maximum displacement of mold shelf reduced to 0.4740mm, the maximum stress reduced 843.44MPa to 742.38MPa. Load distribution of the mold is more uniform, deformation and displacement also improved. It provides a new method and theoretical basis for optimal design of powder molding shelf.

Influence of Cross Beam on the Stress of Joints in A-Type Pier of a Bridge

2012 ◽  
Vol 446-449 ◽  
pp. 1329-1332
Author(s):  
Chun Ping Tang ◽  
Liang Liang Zhang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Maximum Stress ◽  
Analysis Software ◽  
Element Analysis ◽  
Beam Depth ◽  
Layer Analysis ◽  
High Pier

Non-linear numerical simulation is done on A-type super high pier by using finite element analysis software ANSYS, obtaining the node stress distribution under load in the node area taken in the sequential layer analysis of overall mode. The conclusion is mainly as follows: the change of width and thickness of cross beam exerts slight impact on the maximum stress of the node while the change of cross beam depth impacts the node stress much. From the computation, it can be concluded that proper reduction of cross beam depth is beneficial to the node stress.

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