Search results

The instance shows that the method is reasonable and different parameters will affect the optimized results.
(5) They must satisfy two conditions of the displacement coordination and force balance in equilibrium equation of static structure properties.
Fig. 1 Mechanical model Fig. 2(a) pk=1.0 Fig. 2(b) pk=2.0 Fig. 2(c) pk=3. 0 Fig. 2 (d) pk=4.0 Fig. 2 (e) pk=5.0（matrix singular） Fig. 2 Optimizing results under different penalty factor of pk The Fig. 2 shows that different penalty factors have a great influence on the optimized results if the topology volume fraction and filter radius do not change.
The optimized result is messy when penalty factor pk = 2.0 in Fig. 2(b).
Moreover, the different penalty factors are discussed in the process of optimization.

The fluidity was a little increased by Sr additions but it was not affected by Ca additions.
Based on the castability tests, 2%Ca and/or 2%Sr were added to the Mg-6%Al-0.2%Mn alloy, and their effects on the microstructure and mechanical properties were investigated.
Introduction Although Mg-Al alloys offer a good combination of mechanical properties, castability, corrosion resistance, and cost, they are not suitable for being used at elevated temperatures due to the low thermal stability of Mg17Al12 phase formed in grain boundaries.
On the other hand, little change of tensile properties occurred by Sr addition alone.
The Sr addition was not found effective in enhancing the tensile properties of base alloy, either.

Introduction Silicon is the most important material for making micro-mechanical parts because it has excellent mechanical properties as well as other merits such as the abundant supply of the inexpensive raw material to produce from, and the controllable processing procedure for achieving high level of purity.
Anyhow, from view point of safety and economic factors it is a worth trying on one of these lasers in silicon micromachining.
Number of experiments to be carried out in each phase is determined using 3k full factorial design, where k is number of factors and 3 factor levels.
Thus, the experiment is designed with 2 factors, 1 block, and 3 center points which lead total number of runs to 11.
None of the factors considered affected the size of the spot significantly.

Introduction Tungsten is a promising armour material for plasma facing components of nuclear fusion reactors (NFR) because of its low sputter rate and favourable thermo-mechanical properties (high melting point and good thermal conductivity) [1].
Morphology, structure, integrity and mechanical properties of the coatings have been extensively investigated [3-4].
This paper reports some results of an experimental campaign for investigating the microstructural characteristics and the mechanical properties of tungsten samples for fusion applications.
Besides the intensity of the peak, cold-working affects also the background level that is structure sensitive and results a little higher.
In addition, microstructure and properties of the tungsten with higher porosity (9 %) are not stable following heating up to 773 K because of the reduction of porosity and a moderate recovery of defective structures.

Properties of concrete.
P.Ⅱ42.5 Portland cement, quartz sand, tap water, superplasticizer: high consistency naphthalene water reducing agent, detail properties as shown in table 1, fiber: PVA fiber, in order to obtain high toughness and controllable microcrack(≤200μm), PVA fiber needed high hydrophilicity and high modulus, detail parameters shown in table 2: Table 1 Properties of superplasticizer solid-containing content (%) 92.0 PH value 9.0 Sodium sulfate 4.0 water reduction ≥18.0 (0.75%cement) Table 2 Typical geometrical and mechanical properties of the PVA fiber Diameter (mm) Length (mm) Elongation (%) Young’s modulus (GPa) Tensile strength (MPa) 40 12 7 41 1560 Test Methods.
Vessel should be minimized affect on mechanical properties.
The match of Self-healing system and matrix material is important factors on healing efficiency and properties of concrete.
The surface properties wall material strength, geometry parameter and dosage of self-healing system have important role on self-healing effect.

Vibration and noise problems not only affect the crew's work and life, but also affect the performance of vessel and the high-tech equipment on board.
MR used on the vessel not only must have excellent damping properties, but also meet the environment of the vessels, the marine corrosive environment.
Mechanical Engineering Handbook(Second Edition)[M].
Beijing: Mechanical Industry Press, 1996:4-248
Research on Dissipation and Fatigue properties of Meral Rubber Material at High-low Temperature [D].

GMM differs from ordinary elastic material, the material has stronger nonlinearity and is easily affected by external factor such as stress, temperature, magnetic field and so forth[4].
But this is the favorable factor which makes magnetization field in magnetostrictive rod relatively uniform.
Summary This paper systematically elaborated GMM application characteristic, Analyzed external stress, magnetic field and magnetic belt machine factors, coupling and temperature...etc. and shrink material characteristic of impact.
It uses finite element analysis to simulate mechanical properties, modal characteristics of preloading mechanism, permanent magnetic circuit and electromagnetic circuit of giant magnetostrictive micro-displacement actuator.
Dapino,Alison B.Flatau and Frederick T.Calkins．Statistical Analysis of GMM Material Properties.Journal of intelligent material systems and structures Vol.17 July 2006

Schreiber [16] confirmed that the mechanical properties of the wrokpiece material have a great influence on the magnitude and distribution of the residual stresses.
It is therefore of great significance to exactly evaluate the effects of all these factors including machining parameters, tool wear, material properties on the residual stresses induced by hard turning process.
This is mainly due to that all required material properties are not accurately known.
Wu and Matsumoto, and Lin et al [17, 27] used Finite Element techniques to determine factors, which affect residual stress formation and distribution in hard turning.
The magnitude depends on properties of work material under cutting conditions.

In the cold roll-beating process, the mechanical property is determined by the microstructure of the parts, and the quality of the forming parts is closely affected.
When 40Cr is in high speed, large deformation impact process, the material exhibits a wave-like fluctuation; this is essentially due to the microstructure change of the material under the influence of the macro factors---deformation temperature, deformation rate, deformation degree.
There are many factors affecting the flow stress in high-speed large deformation.
However, the factor of flow stress curve is affected by the evolution of organization of the material in the deformation process.
Da, Influence of Dynamic Recrystallization on Tensile Properties of AZ31B Magnesium Alloy Sheet, Materials and Manufacturing Processes, vol. 25, no. 8, pp. 880-887, August 2010

And the factors that impact the permeability were discussed in this research.
And the factors that impact the permeability were discussed.
The moisture-resistance property depends on the packaging materials.
If improper packaging materials were chosen, products would be affected by the amount of water vapor and cause damage or even completely lose value.
For the middle layer, it needs certain strength, excellent barrier properties, and double-sided conformity.