Study of Moving Sinusoidal Wave Load Across Simple Supported Beam for Sensor Structural Configuration

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Biaobiao Zhang ◽  
W. Steve Shepard
Keyword(s):  
Finite Element Method ◽  
Material Properties ◽  
Sinusoidal Wave ◽  
Wave Load ◽  
Acoustic Source ◽  
Structural Configuration ◽  
Beam Structure ◽  
Response Characteristics ◽  
Simple Supports ◽  
Sensor Configuration

A continuous structure has several response characteristics that make it a good candidate for a sensor to be used in locating an acoustic source. In this paper, based on a beam structure with simple supports on both ends, the response of the structure to transient sinusoidal wave excitations is examined analytically and also verified by a finite element method (FEM). For sensor configuration on this structure, various interesting parameters such as the aperture of the structure, material properties, and thickness are examined by evaluating their effects on structure displacement responses. Results will be used for acoustic wave identification in the future.

Dynamic Responses Analysis of Permeable Breakwater Subjected to Random Waves

2014 ◽  
Vol 1061-1062 ◽  
pp. 809-812
Author(s):  
Hu Ping
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Responses ◽  
Exceedance Probability ◽  
Random Waves ◽  
The Finite Element Method ◽  
Wave Load ◽  
Power Spectral ◽  
Density Analysis ◽  
Element Method

In this paper, based on the finite element method and ANSYS software, the dynamic responses of permeable breakwater under wave load response is analyzed and studied. Taking the method of combining modal analysis and power spectrum analysis research on dynamic response of breakwater in the frequency domain and the principal stress and displacement distribution of the structure in the exceedance probability of 0.7%. The results prove that the finite element method of power spectral density analysis can provide effective guidance for the actual engineering.

An efficient semi-analytical static and free vibration analysis of laminated and sandwich beams based on linear elasticity theory

2021 ◽  
pp. 030932472110626
Author(s):  
Zhao Yin ◽  
Hangduo Gao ◽  
Gao Lin
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Free Vibration ◽  
Mechanical Load ◽  
Geometric Model ◽  
Free Vibration Analysis ◽  
Sandwich Beams ◽  
Beam Structure ◽  
Precise Integration ◽  
Element Method

Based on the two-dimensional (2D) elastic theory without enforcing any beam assumption, an efficient semi-analytical scaled boundary finite element method (SBFEM) is proposed to solve the bending and free vibration responses of composite laminated and sandwich beams under the mechanical load. The scaled center is placed at infinity, which produces the accurate result by discretizing only the longitudinal direction of the beam structure treated as a one-dimensional (1D) discretization problem. A new kind of 1D high-order spectral element shape functions with the advantages of high accuracy and superior convergence is introduced in SBFEM coordinate system to approximate the geometric model and corresponding variables. The principle of weighted residual in conjunction with the Green’s theorem are applied to obtain the SBFEM governing equation of each layer with respect to radial displacement fields. The solution of equation is indicated analytically by a matrix exponential function, which can be accurately solved by using the precise integration technique (PIT). Finally, an effective and simple stiffness matrix is obtained. By comparing two examples with the solutions based on the finite element method (FEM), the results show that the proposed method has good accuracy and rapid convergence with only a few meshes. The numerical examples are given to investigate the parametric effects of the stacking sequence, thickness ratio, boundary condition, and load form on the variation of the displacement, stress and natural frequency. The results validate that the present technique is also applicable to the complex beam structure with softcore layer inside.

The Numerical Simulation of Effective Elastic Response for WC-Co Cemented Carbide

2015 ◽  
Vol 1096 ◽  
pp. 417-421
Author(s):  
Pei Luan Li ◽  
Zi Qian Huang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Theoretical Model ◽  
Material Properties ◽  
Cemented Carbide ◽  
Elastic Response ◽  
The Finite Element Method ◽  
Simulation Results ◽  
Element Method

By the use of finite element method, this paper predicts the effects of the shapes of reinforcements with different ductility (Co) on the effective elastic response for WC-Co cemented carbide. This paper conducts a comparative study on the material properties obtained through theoretical model, numerical simulation and experimental observations. Simulation results indicate that the finite element method is more sophisticated than the theoretical prediction.

Effects of Prosthesis Stem Materials on Stress Distribution of Total Hip Replacement

2010 ◽  
Vol 129-131 ◽  
pp. 343-347 ◽  
Author(s):  
Abdul Halim Abdullah ◽  
Alias Mohd Saman ◽  
Mohd Asri Mohd Nor ◽  
Ishkrizat Taib ◽  
Giha Tardan
Keyword(s):  
Finite Element Method ◽  
Material Properties ◽  
Hip Replacement ◽  
Stress Shielding ◽  
Distal Region ◽  
Stress Distributions ◽  
Middle Region ◽  
Femur Bone ◽  
Calculated Stress ◽  
Intact Femur

Bone loss and bone thickening phenomenon occurred due to different stiffness of the implant and femur. Implant with stiffer materials than the bone carries majority of the load and it transferred down along the implant till the distal tip of the stem. Both phenomenons contribute to stress shielding and loosening of the prosthesis stem. In this study, the stress distributions in intact femur and THR femur are established using finite element method. The THR femur model consists of cemented hip Ti6Al4V and CoCrMo prosthesis stem implanted inside the femur bone. Effects of different material properties of the prosthesis stem on the resulting stress distributions are investigated. Results shows that the largest discrepancy in stress values between intact and THR femur is predicted along the middle region at both lateral and medial planes. The distal region shows that the calculated stress for both THR femur experienced higher stress magnitude than that of intact femur. The higher stress in THR femur leads to bone thickening at the particular region. The corresponding stress magnitude saturates at 25 MPa for THR femur while intact femur is slightly lower at 22 MPa.

Determination of the Elastic and Plastic Properties of Transversely Isotropic Thin Films on Substrates by Sharp Indentation

MRS Advances ◽  
2018 ◽  
Vol 3 (8-9) ◽  
pp. 445-450
Author(s):  
Zheng Zhi ◽  
T. A. Venkatesh
Keyword(s):  
Thin Films ◽  
Material Properties ◽  
Transversely Isotropic ◽  
Indentation Method ◽  
Plastic Properties ◽  
Response Characteristics ◽  
Functional Relationships ◽  
Thin Film System ◽  
Indentation Response

ABSTRACTA combination of dimensional analysis and finite element modeling was invoked to characterize the indentation behavior of transversely isotropic thin films on substrate materials. Through indentation simulations of over 13,500 combinations of properties for the thin film system, functional relationships that connect the indentation responses of the thin films with the elastic and plastic properties of the thin films were obtained. The forward algorithms that predict the indentation response characteristics from known material properties and the reverse algorithms that predict the material properties from known indentation responses were verified to be very accurate. Thus, the viability of using the indentation method to determine the elastic and plastic properties of transversely isotropic thin films on substrate materials was demonstrated.

1E24 Material Properties Estimation for Intervertebral Disc Damage Using Finite Element Method

2015 ◽  
Vol 2015.27 (0) ◽  
pp. 193-194
Author(s):  
Keisuke Sasagawa ◽  
Masafumi Oda ◽  
Keiko Katsuyama ◽  
Kazuhiro Hasegawa ◽  
Toshiaki Hara ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Intervertebral Disc ◽  
Material Properties ◽  
Element Method

Evolution of Matt Surface Topography in Aluminium Pack Rolling

2005 ◽  
Author(s):  
Hiroshi Utsunomiya ◽  
Michael P. F. Sutcliffe ◽  
Hugh R. Shercliff ◽  
Pete S. Bate ◽  
Dan B. Miller
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Surface Topography ◽  
Material Properties ◽  
Quantitative Agreement ◽  
Aluminium Foil ◽  
The Finite Element Method ◽  
Good Quantitative Agreement ◽  
Pack Rolling ◽  
Element Method

Roughening of the matt surface of pack rolled aluminium foil has been modelled. The model is based on the finite element method using isotropic plasticity. A distribution in material properties has been used to simulate the distribution of orientations through the material. The predictions of roughness show good quantitative agreement with the experiments.

Fatigue and Damage Tolerance Substantiation Approach for a Regional Jet

2014 ◽  
Vol 891-892 ◽  
pp. 1688-1693
Author(s):  
Toshiyasu Fukuoka ◽  
Kaoru Tsukigase ◽  
Keisuke Kumagai
Keyword(s):  
Fatigue Test ◽  
Fatigue Damage ◽  
Material Properties ◽  
Damage Tolerance ◽  
Full Scale ◽  
Structural Configuration ◽  
Component Level ◽  
Regulatory Requirement ◽  
Analysis Methodology ◽  
Structural Tests

The overview of the fatigue and damage tolerance substantiation approach for a 70-90 seat class regional aircraft named Mitsubishi Regional Jet, which is now under development by Mitsubishi Aircraft Corporation, is presented. To comply with the new regulatory requirement for prevention from widespread fatigue damage, full-scale airplane fatigue test will be performed with simulating actual airplane structural configuration and typical loading spectra expected in service. In addition to widespread fatigue damage, damage tolerance evaluations assuming manufacturing defect or in-service damage are being performed. Hundreds of structural tests from coupon level to sub-component level are to be used to verify the material properties and analysis methodology.

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