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Online since: May 2015
Authors: Wu Zhou, Bei Peng, Peng Peng, Lian Ming Du, Xiao Ping He, Hui Jun Yu
The attachment of the micromechanical silicon die to the substrate is one of the most critical steps in the packaging of highly accurate MEMS (microelectro-mechanical systems) accelerometer.
As the results show, Young’s modulus and the thickness of the adhesives are the most significant factors influencing the stress and deformation of the silicon die.
Introduction MEMS technology integrates mechanical elements and electronics onto a common substrate by the technology of microfabrication [1].
Several investigations have showed that the material properties of adhesives significantly affect the stress and strains of MEMS device sensitive element when cooled from cure temperature to room temperature.
The material properties for simulation is shown in Table .1.
Online since: January 2026
Authors: Antti Kaijalainen, Pekka K. Kantanen, Tuomas Perkiö
Most promising mechanical properties were obtained with material 6Mn–0.4C annealed at 700 °C.
Annealing temperature has significant effect on the volume fraction and stability of RA and thus on mechanical properties [3].
YS in MMnS is known to be governed by the softer phase, in this case RA, and grain size of RA is reported to be important factor affecting YS [10]. 365 and 465 experience characteristic YS decrease and UTS increase with increasing RA fraction.
Han, “A Critical Review on Medium-Mn Steels: Mechanical Properties Governed by Microstructural Morphology,” Feb. 01, 2023, John Wiley and Sons Inc. doi: 10.1002/srin.202200238
Kumar, “Microstructure and Mechanical properties of Medium Manganese Steels,” Mater Today Proc, vol. 56, pp. 356–367, Jan. 2022, doi: 10.1016/j.matpr.2022.01.195
Online since: October 2014
Authors: Zi Tian Fan, Zhong Zhao
In order to improve the mechanical properties of A356 aluminum alloy in lost form casting (LFC), vibration and pressure were applied to solidification process of LFC, and the microstructures and the mechanical properties of the castings were compared with that of the castings in LFC without vibration and pressure.
However, the main problems that the wide application of A356 alloy in LFC is limited are the low mechanical properties and high porosities, etc.
In order to improve the mechanical properties of A356 alloy castings, there are the methods often used, such as modified the eutectic silicon, refined the grains, increased the strengthening phase, and heat treatment, etc[2].
Besides the microstructures of the coarse grains, the main defects of A356 alloy castings in LFC, such as pinholes, shrinkage, etc, have a significantly influence on the mechanical properties.
Because the length and diameter of the dendrites growth are affected by the alloy composition, cooling rate, solute diffusion and other factors, the dendrite length or diameter is difficult to control.
Online since: September 2013
Authors: Tian Feng Gu, Jia Ding Wang
Factors affecting loess liquefaction caused by earth microtremors 4.1 c and values of loess Now let us analyze Coulomb’s Law (2) We can find that c and c and values are respectively measurable parameters of the friction and clay bridges among particles from formula(2).We wanted to know how c and values of loess vary after loess is soaked by water.
Collapse is due to contributory factors such as water soaking,self-load pressure and dynamic load and to built-in internal factors such as large pores and chemical,mineral and moisture contents.
Dynamic load caused earth microtremors is the most important of these factors.
,and Yao, M.,1997,Mechanical Properties of Loose Liquefied Sand Undergoing Lateral Flow: Proceedings of the International Symposium do Landslide Hazard Assessment, Xian,China,PP.57-74
In Genesis and Properties of Collapsible Soils: kluwer Academic Publishers Group, Dordrecht, pp. 267-293
Online since: July 2015
Authors: Muhammad Fitrullah, Marta Hendra, A.A. Alhamidi, A. Herliawan, Abdul Aziz, D. Yanyan, T. Adhitya, Partuti Tri, J. Andinnie
In heat treatment process, the mechanical properties like roughness, strength and toughness from the steel can be controlled.
In this case, the mechanical properties of ISODUR™ steel will be controlled for coining dies by heat treatment process, especially for tempering.
The properties from inter-metallic phase between TiN coating and ISODUR™ steel are also the factors causing micro-cracking.
Changing one of the factors may influence other factors but, it does not constantly influence each dies.
Effect Of Heat Treatment On Mechanical Properties Of H11 Tool Steel.
Online since: January 2012
Authors: Yan Li Song, Lin Hua
Moreover, the evaluation of welding residual stress and strain affecting the formability of TWBs has not been reported previously.
In order to measure the mechanical properties of base sheets, uniaxial tension tests were performed on a Zwick Z100 material testing machine.
The measured hardening curves are shown in Fig. 2.The measured properties of the base materials are listed in Table 1.
Table 1 Plastic properties of the base sheets.
The evaluation of welding residual strain and stress affecting the TWB formability was conducted by comparing the simulated and experimental results of the Erichsen cupping tests.
Online since: July 2008
Authors: Michael Modigell, Lars Pape, Roberto Roberti, Annalisa Pola
The predicted thixotropic properties were verified by measuring the microstructural conventional parameters, such as globule size and shape factor, and the solidification range, by means of differential scanning calorimetry.
Furthermore, they need T4, T5, or T6 heat treatments to improve their mechanical properties, whose level remains nevertheless fairly modest compared with wrought alloys.
Two different amounts of Ag were considered to find out the best compromise between costs and mechanical properties.
It can be seen that an artificial ageing at 180°C offers, always, the highest properties.
The expected shear-thinning and thixotropic flow properties are clearly visible.
Online since: May 2014
Authors: Ming Zhang Ao, Jun Mei Wan
Experimental Study of Biological Material Preparation Based on Optical and Mechanical Dynamics Junmei Wan1, a, Mingzhang Ao2 1Biological Engineering College, Wuhan Polytechnic, 430074, Wuhan, China 2School of Life Science and Technology, Huazhong University of Science and Technology, 430074, Wuhan, China a e-mail: junmei_wan@163.com Keywords: Electrochemical; Mechanical dynamics; Optical properties; Nanometer material; Tissue engineering; Implantable medical devices Abstract.
The main components of Konjac glucomannan are glucose and glucomannan that are byβ1-4 bond [ molar ratio is 1.6: (1~4) ] of high molecular weight non-ionic glucomannan, special glucose and mannose’s β -1-4chain structure isn’t affected by the human digestive enzymes, and does not generate heat.
According to the peculiar properties of konjac glucomannan, through the scientific experiment in the body of a rabbit to verify its unique immunological function, and then the human experiments after the effective experimental data statistics scientific analysis, finally the system can obtain the effect of konjac glucomannan on human immune system.
Purification and properties of konjac-oligosaccharidos [J].
[7] Xu Shiying, Qian He. konjac-oligosaccharidos chemical structure and rheological properties [J].
Online since: October 2012
Authors: Xin Gong Li, Qi Fei Ling, Yong Lin Yan
Influence of the hot-pressing temperature, hot-pressing time, board density and the amount of isocyanate adhesive on straw particle board mechanical properties were studied.
Experimental Results and Analysis Mechanical Properties Test Results (Table 3) Tab. 3 Mechanical Properties of Straw Particle Board No.
(fig.1-4) Fig.1 Influence of factors and levels on MOR Fig.2 Influence of factors and levels on MOE Fig.3 Influence of factors and levels on TS Fig.4 Influence of factors and levels on IB Conclusion and Analysis Influence of MDI Applied Amount on Board Mechanical Properties.the increase of the MOR, MOE and IB along with the increase of MDI applied amount, but TSR opposite.
The best mechanical properties of straw particle board is the MDI applied amount of 3%.
Properties of Medium Density Fiberboard of Rice-straw with UF Resin [J].China Forest Products Industry,2002 (03)
Online since: October 2012
Authors: Ju Jen Liu, Yuan Ching Lin, Ben Yuan Lin
The mechanical and metallurgical properties of the FSSW specimens were characterized to evaluate the performance of the different tools.
Therefore, tool geometry is one of the key factors in determination of bond strength [4, 7].
Lu, Mechanical Properties and Fracture Behavior of Friction Stir Spot Welded AZ61 Magnesium Alloys, Advanced Materials Research 154-155 (2011) 498-507
North, Microstructural features and mechanical properties of AM60 and AZ31 friction stir spot weld, Materials and Design, 31 (2010) 4764–4776
Hu, “Microstructures and mechanical properties in dissimilar AZ91/AZ31 spot welds,” Materials Characterization, 61 (2010) 1018–1028
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