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Online since: October 2004
Authors: F.H. Samuel, M.A. Moustafa, H.W. Doty
Among aluminum alloys, aluminum-silicon (Al-Si) alloys are known for their good castability and mechanical properties.
These parameters are completely changed after heat treatment [5,6], which, in turn, influence the resultant mechanical properties [7,8].
Particle size, shape, and spacing are the factors that characterize the silicon particle morphology.
These plates act as crack initiators and appreciably lower the alloy mechanical properties.
Conclusions A study of the effect of Mg and Cu alloying additions and solution heat treatment (at 500 °C for times up to 24 h) on the microstructural characteristics and mechanical properties of A413.1 alloy was carried out.
Online since: January 2012
Authors: Sabine Zamberger, Ernst Kozeschnik
The numerical simulation is performed with the thermokinetic software package MatCalc, where the precipitation kinetics is examined for the experimentally applied thermo-mechanical cycles.
One of the key factors determining the resistance against sulfide stress cracking is the type of carbide and nitride precipitation occurring in the production process.
Tempering of martensite is utilized to adjust the mechanical properties of Q&T steel according to its application requirements.
The fact that M3C and M7C3 are found to be cigar-shaped is accounted for by the shape factor of 3 [18].
Obviously, not only M3C and M7C3 are affected by these changes, but also VC precipitates are now in better agreement with the experiments.
Online since: February 2015
Authors: László Dévényi, Miksa Kovács, Dóra Károly
Table 1 shows the investigated stent systems' nominal properties.
Results Table 2 MSA and the according properties of stents with the manual method.
We plan to use the obtained image data to create a three-dimensional stent models and run finite-element simulations to predict mechanical properties of stents with given defined patterns.
Dobránszky, Different properties of coronary stents, Anyagok világa, 7:2 (2007) 1-7
Dobránszky, Mechanical properties of coronary vein – in vitro evaluation of longitudinal and transversal samples, Biomechanica Hungarica 3:1 (2010) 24-32
Online since: August 2012
Authors: Zhi Gang Tao, Peng Zhang, Xiao Gang Chen, Jun Yang, Yang Gui
Affected by the Wenchuan Earthquake, parts of adobe houses at the top of North Mountain started to crack and fell down.
The system monitors the factors influencing slope stability 24 hours a day including surface displacement, the groundwater level and precipitation.
Monitoring principles and mechanical model of landslides A.
Mechanical model The sliding force in the sliding mass belonging to the natural mechanical system is immeasurable, but the artificial mechanical system can be measured easily.
So we can insert the measurable artificial mechanical system into the immeasurable natural mechanical system, which makes up to a new complex system.
Online since: June 2013
Authors: Michael Kirley, Nicholas Haritos, Maryam Varmazyar, Tim Peterson
Damage affects structural physical properties including stiffness, mass, and damping, which consequently changes the structural response behaviour and alters the current and future performances.
In order to employ the Bayesian framework, the analytical model is parameterized in terms of structural stiffness K as an assembly of element stiffness matrices assuming that damage affects only the stiffness properties of the structure.
The material properties for the undamaged beam are mass density of 2400 kg/m3, Young’s modulus of 30GPa, and Poisson’s ratio of 0.25.
Heylen, An hybrid real genetic algorithm to detect structural damage using modal properties.
Mechanical systems and signal processing 25 (2011) 1559
Online since: July 2011
Authors: Kevin G. Ewsuk, Nathan Young, Jay Johnson
To facilitate and optimize package design, thermal and mechanical simulations were used to understand and control the critical parameters in LTCC package design.
The material properties utilized for the baseline model are summarized in Table 1.
Table 1: Materials and Properties used in Thermal Modeling.
The best possible material property values are assumed in the analysis.
Retrieved 15 June, 2010, from Matweb Material Property Data: http://www.matweb.com/search/Indium
Online since: December 2012
Authors: Zhang Fang Hu, Yuan Luo, Chao Ji
Introduction The basic properties of MEMS (micro electro mechanical system, MEMS) devices,which have the moving parts,such as resonator, vibration gyro, accelerometer and light switch,are the dynamic characteristics, especially in different frequency or under the condition of different voltage the movement amplitude.
The image edge effects can also affect the degree of tapering and clarity of the peak.
But the test results will have an impact ,because of uneven illumination, gray and other factors.In testing, collecting two MEMS dynamic image with noise (subject to Gaussian noise) to interference test, and verify that the algorithm in this paper, noise immunity and effectiveness. 3.1 The graphical results Computer simulation results are as follows: Figure.2 Contains the noise Figure.3 Phase correlation matrix Figure.4 The reconstruction Phase of the original image correlation matrix of Rank1 estimates Figure 5.
Conclusion Articles relying on MEMS dynamic testing system, the micro-structure of MEMS devices for stroboscopic imaging technique planar motion image sequence processing, the proposed sub-pixel motion estimation algorithm based on the SVD phase, experimental results demonstrate the feasibility of the algorithm and its traditional algorithm embodied in the advantages: 1. image differences due to uneven illumination, gray and other factors the test results will not have an impact, good anti-jamming. 2.direct the plane motion amplitude of MEMS micro-structure of the sub-pixel level without the need for difference and advantages.
Online since: September 2015
Authors: Oleg Sitdikov, Dayan Nugmanov, Michael Markushev
Besides, these alloys also suffer from strong anisotropy of mechanical properties [e.g. 1,2].
One of the traditional ways to improve the balance of alloy’s properties is the refinement of the structural components and enhancement of their spatial distribution within cast and wrought semi-products.
However, MIF has a quite rarely use for magnesium alloys resulting in the scarcity of the data on microstructural development and factors affecting their grain refinement.
Online since: October 2014
Authors: Qing Wei Guo, Jing Song Wang, Ping Sun, Shuai Fan, Wei Ming Zhang
Introduction As the indispensable supporting industry of metallurgical industry, chemical industry, mechanical industry, electronic industry, military industry, electroplating industry plays an important role in the national economy.
Cu2+ can deposit at the cathode is determined by its own electrochemical properties and electrochemical properties of other ions in solution.
The main factors affecting result of experiment are initial concentration of copper ions, temperature of electrolyte, voltage, electrode spacing and initial pH value.
Online since: September 2011
Authors: Da Gen Su, Chu Jie Jiao, Juan He, Cong Mi Cheng
Based on the mechanical properties, EPS beads can be considered as pores [2], and cement matrix filled among EPS beads is considered as the pore-wall material.
In addition to cement matrix, EPS beads content and size are key factors impacting on PAC strength.
Roy studied the mechanical properties of PAC mixed by high-strength matrix materials and EPS beads, summed up the relational model of PAC strength, beads size and content of EPS [5].
PAC density has greater affect on the descending segment of stress-strain curve.
Gibson and M.F: Ashby, Cellular Solids: Structure and Properties, 2nd edition (Cambridge University Press, UK, 1997)
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