Evaluations of Absorption Materials Applied in the Noise Reduction: Experiment and Simulation

2019 ◽  
Vol 947 ◽  
pp. 125-129
Author(s):  
Y.C. Liu ◽  
Y.C. Huang ◽  
Yun Jhe Tang ◽  
Tzu Hsuan Lei
Keyword(s):  
Finite Element ◽  
Simulation Method ◽  
Comsol Multiphysics ◽  
Airflow Resistance ◽  
Finite Element Software ◽  
Reduction Experiment ◽  
Multiphysics Simulations ◽  
Element Simulation ◽  
Simulation Results ◽  
Good Agreement

This article presents a finite element simulation method for airflow resistance of material to predict the influence of absorption material applied to compressor box. To obtain the real airflow resistance, a measurement system based on the standard ASTM C522-03 was systematically built up and carefully verified. Furthermore, commercial finite element software, COMSOL Multiphysics, was adopted to create the model and execute the simulation with and without absorption material. Results showed that airflow resistance increases with the thickness and the density of the material. This system is quite stable and suited to any material. With the aid of COMSOL Multiphysics simulations, the performance of noise with and without absorption material can be analyzed and compared with experimental results. There was good agreement between experimental and simulation results. Based on absorption material of 15,278 Pa.s/m3 airflow resistance, the noise level outside the compressor box obtained from experiment was around 10 dBA higher than that obtained from simulation.

Research into Contact Interaction of an Elastic Tool during Rotational Pattern Cutting of Sheet Parts

2016 ◽  
Vol 685 ◽  
pp. 408-412 ◽  
Author(s):  
E.G. Gromova ◽  
A.G. Bakanova
Keyword(s):  
Finite Element ◽  
Mathematical Simulation ◽  
Elastic Medium ◽  
Design Process ◽  
Experimental Research ◽  
Simulation Method ◽  
Medium Pressure ◽  
Element Simulation ◽  
Deformation Processes ◽  
Simulation Results

The paper describes a method of pattern cutting of sheet articles using the elastic medium pressure. Research works have been conducted into feasibility of the suggested pattern cutting using finite element simulation method. The experimental research was conducted into deformation processes during rotational separating stamping of sheet articles by means of elastic medium pressure so that to confirm relevance of the mathematical simulation results. The optimum design process parameter value combinations have been determined for implementing the rotary pattern cutting process.

Collapse of Sharp-Notched 6061-T6 Aluminum Alloy Tubes Under Cyclic Bending

2016 ◽  
Vol 16 (07) ◽  
pp. 1550035 ◽  
Author(s):  
Chen-Cheng Chung ◽  
Kuo-Long Lee ◽  
Wen-Fung Pan
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Cyclic Bending ◽  
Finite Element Software ◽  
Buckling Failure ◽  
Simulation Results ◽  
Number Of Cycles ◽  
The Moment ◽  
The Relationship ◽  
Good Agreement

The mechanical behavior and buckling failure of sharp-notched 6061-T6 aluminum alloy tubes with different notch depths subjected to cyclic bending are experimentally and theoretically investigated. The experimental moment–curvature relationship exhibits an almost steady loop from the beginning of the first cycle. However, the ovalization–curvature relationship exhibits a symmetrical, increasing, and ratcheting behavior as the number of cycles increases. The six groups of tubes tested have different notch depths, from which two different trends can be observed from the relationship between the controlled curvature and the number of cycles required to ignite buckling. Finite element software ANSYS is used to simulate the moment–curvature and ovalization–curvature relationships. Additionally, a theoretical model is proposed for simulation of the controlled curvature-number of cycles concerning the initiation of buckling. Simulation results are compared with experimental test data, which shows generally good agreement.

scholarly journals Finite Element Modelling and Simulating Effects of Hairiness Performance on Hairiness Entanglement During Fabric Pilling

2021 ◽  
Author(s):  
Qi Xiao ◽  
Rui Wang ◽  
Hongyu Sun ◽  
Jingru Wang
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Strain Energy ◽  
Dissipation Energy ◽  
Motion Equations ◽  
Dynamic Motion ◽  
Element Simulation ◽  
Frictional Dissipation ◽  
Simulation Results ◽  
Good Agreement

Abstract For analyzing behaviors of hairiness entanglement during fabric pilling, nonlinear dynamic motion equations are deduced based on the elastic thin rod element, combined with the moving characteristics of hairiness, which follow the principles of mechanical equilibrium and energy conservation. The finite element simulation model of the effects of hairiness performance on behaviors of hairiness entanglement was established by ABAQUS. The analysis solution values of nonlinear dynamics were compared with the finite element simulation results. The results showed that hairiness elastic modulus, hairiness friction coefficient and hairiness diameter have significant effects on frictional dissipation energy, strain energy and kinetic energy produced by hairiness entanglement during pilling. Compared the finite element simulation results with analysis solution values, they are in good agreement. The fitness is greater than 0.96, which verifies the validity of finite element method.

Experimental and Numerical Investigation of the Effect of Anisotropy on Springback in U-Bending Process

2011 ◽  
Vol 473 ◽  
pp. 645-652
Author(s):  
Vahid Daiezadeh ◽  
Majid Elyasi ◽  
Behzad Rahmani ◽  
Mohammad Bakhshi-Jooybari
Keyword(s):  
Finite Element ◽  
Steel Sheet ◽  
Experimental Approach ◽  
Rolling Direction ◽  
Bending Angle ◽  
Finite Element Software ◽  
Element Simulation ◽  
Bending Process ◽  
Simulation And Experiment ◽  
Simulation Results

In this research, the effect of anisotropy on springback in CK67 steel sheet in U-bending process was studied by finite element simulation and experimental approach. The finite element software, ABAQUS/EXPLICIT 6.7, was used for simulation. In order to verify the simulation results some experiments were performed. The obtained results indicated that increasing the bending angle to the rolling direction resulted in an increase in springback. The results of the experiments were compared with simulation results. There was significant agreement between simulation and experiment.

Numerical Simulation of Different Clamping Modes on Stretch Forming Parts

2011 ◽  
Vol 189-193 ◽  
pp. 1922-1925 ◽  
Author(s):  
Xue Chen ◽  
Mine Zhe Li ◽  
Wen Zhi Fu ◽  
Zhong Yi Cai
Keyword(s):  
Finite Element ◽  
Thickness Distribution ◽  
Finite Element Models ◽  
Stretch Forming ◽  
Forming Quality ◽  
Finite Element Software ◽  
Simulation Results ◽  
Clamping Device ◽  
Better Than ◽  
Good Agreement

Three clamping devices of stretch forming machine were introduced, and the corresponding finite element models of the spherical parts were built by finite element software, the strain and thickness distribution of the forming parts were comparatively analyzed. The simulation results show that strain and thickness distribution of the forming parts with the multiple discrete gripper clamping mode are well-proportioned, its forming quality gets better than that with the whole flat gripper and adjustable curved gripper clamping modes. The experiment was performed and a typical spherical parts was formed with the multiple discrete gripper clamping mode. The experimental results are in good agreement with simulation results, which proves feasibility and practicability of the multiple discrete gripper clamping device of stretch forming machine.

Cause Analysis of Cracks Found on Horizontal Truss of Quayside Container Cranes

2012 ◽  
Vol 490-495 ◽  
pp. 3013-3017
Author(s):  
Zhen Qiao ◽  
Da Shan Dong ◽  
Hui Qiang Zheng
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Finite Element Simulation ◽  
Simulation Method ◽  
Loading Capacity ◽  
Stress Cycle ◽  
Cause Analysis ◽  
Container Cranes ◽  
Element Simulation ◽  
Simulation Results

Horizontal truss is designed to increase the stiffness of the girder, but cracks are found at the forefront joint after 3years’ operation. To analyze the cause, finite element simulation method is employed. Fatigue calculation is done on the basis of the simulation results according to FEM code. The research indicates that when the structure is working in tension-pressure alternative situation, its loading capacity is sharply reduced, and welding structures are even sensitive to such stress cycle because of serious stress concentration. Operating status should be fully considered to avoid failure in low stress.

scholarly journals RETRACTED: Based on PRO/E Sheet Metal Product Design Simulation

2011 ◽  
Vol 467-469 ◽  
pp. 1357-1360
Author(s):  
Hong Bo Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Hydrostatic Pressure ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Explicit Finite Element ◽  
Finite Element Software ◽  
Element Simulation ◽  
Simulation Results

Numerical simulation is an effective method for predicting formability of metals, and the use of computer simulation enables a significant increase in the number of tool designs that can be tested before hard tools are manufactured. Based on dynamic explicit finite element software, finite element simulation of sheet metal forming was performed to investigate the applicability of applying hydrostatic pressure on blank in multi point discrete dies. Simulation results show that using the hydrostatic pressure on blank is apposite for the process of multi point discrete dies.

scholarly journals Study on the Optimal Prestress Level of RC Beams Reinforced with SMA Bars

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Zeying Yang ◽  
Zhengquan Cheng ◽  
Tianmin Wang ◽  
Yinglin Sun ◽  
Chenghe Wang ◽  
...  
Keyword(s):  
Finite Element ◽  
Concrete Beams ◽  
Shear Capacity ◽  
Experimental Results ◽  
Reinforced Concrete Beams ◽  
Rc Beams ◽  
Finite Element Software ◽  
Element Simulation ◽  
Shear Performance ◽  
Simulation Results

In order to study the optimal prestress level of RC (reinforced concrete) beams strengthened by SMA bars, the finite element software ABAQUS was used to numerically simulate the shear performance of RC beams strengthened by SMA bars with different prestress levels. By using the finite element software ABAQUS, the model of RC beams strengthened by SMA bars with different prestressing levels was established. The influence of SMA bars with different prestressing levels on the shear capacity of RC beams was analyzed from the aspects of stress, strain, load, deflection, and maximum bearing capacity, and the failure types and failure processes of RC beams strengthened with different prestressing levels were obtained. Comparing the numerical simulation results with the experimental results, it is found that the error between the finite element simulation results and the experimental results is less than 10%.

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