Characteristics of Stress Distribution of Micro-Cantilever of Polycrystalline Copper at the Pull-in Voltage

2013 ◽  
Vol 300-301 ◽  
pp. 1309-1312
Author(s):  
Ji Long Su ◽  
Yan Jiao Zhang ◽  
Xing Feng Lian
Keyword(s):  
Stress Distribution ◽  
Cantilever Beam ◽  
Electrostatic Force ◽  
Polycrystalline Copper ◽  
Maximum Deflection ◽  
Micro Cantilever ◽  
Fixed End ◽  
The Relationship

The Ansys simulate software is utilized to analyze pull-in voltages and stresses of the fixed end of micro- cantilever beam with different thicknesses respectively. Based on the analysis of the electrostatic force at the pull-in voltage, the stress of fixed end of micro-beam and the maximum deflection are obtained. The relationship between the stress of fixed end and thickness is established. The results show that the mutation thickness of the stress and the pull-in voltage are at and respectively , it is consistent with the intrinsic size of the polycrystalline copper micro-beam.

Uniform stress distribution road piezoelectric generator with free-fixed-end type central strike mechanism

Energy ◽  
2022 ◽  
Vol 239 ◽  
pp. 121812
Author(s):  
Seong Do Hong ◽  
Jung Hwan Ahn ◽  
Kyung-Bum Kim ◽  
Jeong Hun Kim ◽  
Jae Yong Cho ◽  
...  
Keyword(s):  
Stress Distribution ◽  
Uniform Stress ◽  
Piezoelectric Generator ◽  
Fixed End

scholarly journals Optimal Design of Capacitive Micro Cantilever Beam Accelerometer

2009 ◽  
Vol 3 (9) ◽  
Author(s):  
Othman Sidek ◽  
Muhamad Azman Miskam ◽  
H.M.T Khaleed ◽  
Mohd Fauzi Alias ◽  
Shukri Korakkottil Kunhi Mohd
Keyword(s):  
Optimal Design ◽  
Cantilever Beam ◽  
Micro Cantilever

scholarly journals Prediction of Inhomogeneous Stress in Metal Structures: A Hybrid Approach Combining Eddy Current Technique and Finite Element Method

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Yating Yu ◽  
Fei Yuan ◽  
Hanchao Li ◽  
Cristian Ulianov ◽  
Guiyun Tian
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Magnetic Flux ◽  
Flux Density ◽  
Eddy Current ◽  
Magnetic Flux Density ◽  
Fe Method ◽  
Metal Structures ◽  
Current Technique ◽  
The Relationship

Concentrated stresses and residual ones are critical for the metal structures’ health, because they can cause microcracks that require emergency maintenance or can result in potential accidents. Therefore, an accurate approach to the measurement of stresses is key for ensuring the health of metal structures. The eddy current technique is an effective approach to detect the stress according to the piezoresistive effect. However, it is limited to detect the surface stress due to the skin effect. In engineering, the stress distribution is inhomogeneous; therefore, to predict the inhomogeneous stress distribution, this paper proposes a nondestructive approach which combines the eddy current technique and finite element (FE) method. The experimental data achieved through the eddy current technique determines the relationship between the applied force and the magnetic flux density, while numerical simulations through the FE method bridge the relationship between the magnetic flux density and the stress distribution in different directions. Therefore, we can predict the inhomogeneous stress nondestructively. As a case study, the applied stress in a three-point-bending simply supported beam was evaluated, and the relative error is less than 8% in the whole beam. This approach can be expected to predict the residual stress in metal structures, such as rail and vehicle structures, if the stress distribution pattern is known.

Design and Fabrication of Micro-Cantilever Beam Fiber Bragg Grating Hydrogen Sensor Based on Coated-Palladium Film

2010 ◽  
Vol 37 (7) ◽  
pp. 1784-1788 ◽  
Author(s):  
张晓晶 Zhang Xiaojing ◽  
张博明 Zhang Boming ◽  
陈吉安 Chen Ji′an ◽  
武湛君 Wu Zhanjun
Keyword(s):  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Hydrogen Sensor ◽  
Bragg Grating ◽  
Micro Cantilever

Analysis of Stress in Aircraft Components Using Lock-In Thermography

2010 ◽  
Vol 663-665 ◽  
pp. 1073-1076 ◽  
Author(s):  
Xun Liu ◽  
Jun Yan Liu ◽  
Xu Dong Li ◽  
Guang Yu Zhang
Keyword(s):  
Stress Concentration ◽  
Stress Distribution ◽  
Stress Analysis ◽  
Aluminium Alloys ◽  
Thermoelastic Effect ◽  
Load Frequency ◽  
Effect Theory ◽  
Lock In ◽  
The Relationship

This paper describes a theoretical and experimental analysis on full-filed stress distribution from thermoelastic measurements and its application to determination of stress concentration. The sum of the principle stress can be measured by Thermal Stress Analysis (TSA). Lock-in Thermography is very effective tool to measure the structure stress distribution by its high thermal resolving. In this study, the thermoelastic effect theory is described and the relationship between the temperature and the applied stress is developed in an elastic material. Experiments were carried out with 2A12 aluminium alloys plate and ones with hole structure under cyclic load. The thermoelastic effect coefficient is obtained for 2A12 aluminium alloys materials, and the effect law is analyzed that the stress value measured was affected by load frequencies. The optional load frequency is obtained, and that is, the load frequency is selected greater than 3.5Hz for 2Al12 materilas, and it was found that the structure stress can be evaluated with good accuracies by the lock in thermography. The experiment was carried out for aircraft components stress distribution measurement and structure stress analysis. The experimental results show the stress concentration position is easy found from stress distribution by lock-in thermography.

Simulation and Analysis of the Thermal Stress in Concrete under Temperature Fluctuation Condition

2010 ◽  
Vol 168-170 ◽  
pp. 1957-1960
Author(s):  
Ya Ding Zhao ◽  
Xue Ying Li ◽  
Hong Yang Liu
Keyword(s):  
Temperature Field ◽  
Thermal Stress ◽  
Elastic Modulus ◽  
Stress Distribution ◽  
Thermal Gradient ◽  
Structural Dimension ◽  
Temperature Field Distribution ◽  
Air Content ◽  
Thermal Stress Distribution ◽  
The Relationship

The temperature field distribution and thermal stress distribution in concrete has been studied by finite elements method to establish the relationship between the thermal stress and the temperature in this paper. The results show that the maximum thermal gradient and the maximum thermal stress in the concrete appears on the direction of greater structural dimension, and the thermal stress value is positively correlated with thermal gradient or saying temperature difference and elastic modulus, and is negatively correlated with the water content and air content.

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