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Foam fluid as a very complicated non-newton fluid, there are lots of factors including pressure, temperature, shear rate, foam quality, surfactant concentration and so on.
The rheological properties of foam fluid will abrupt change while the foam quality is 63%.
Influence of interfacial rheology on foam and emulsion properties [J].
Rheological Properties of Aqueous Foams for Underbalanced Drilling [C].
Foam mechanical at bubble scale [J].

But the characteristic of vibration is repetitive loading, so parts are easy caused fatigue and ageing, especially for mechanical insurance is more serious.
The inertial force and duration of the internal impact when the fuze fall down, depend on factors such as the projectile weight, packing method, height and surface properties and so on.
For the fuze safety and arming system, impact parameters that affect safety and arming system mainly include impact acceleration peak value and duration.
And the main influence factors for fuze MEMS pressure sensor are high temperature and recoil.Projectile recoil has larger spread according to different weapons.
Take circular diaphragm for example to study the fundamental frequency influence factors.

Using waste to produce a new type of air entraining agent (AEA), carrying out research of the concrete’s mixture performance, mechanical properties and frost resistance durability after mixing with the AEA, with results showing that amount of air entrained in the concrete mixture and the water reducing rate increases along with the increase of the addition of the new AEA, and its compressive strength loss laws are similar with that of normal AEAs.
Introduction The durability of concrete has received common attention from people, and frost damage is one of the most important factors which affects the durability of concrete.
For the basic properties of the AEA see Table 2 and Table 3.
New AEA physical properties State Density Specific surface area Color Water solubility Fineness Powder 1.47g/cm3 2.891cm2/g Brown Micro merging with water 1.4 Table3.
Table 4 shows the air content testing mixture proportion of AEA added concrete mixture, and Table 5 shows the physical properties of AEA added concrete and frost resistance testing mixture proportion.

In practical applications , due to the impact of air resistance and gravity during the flight by such factors as the projectile at launch , tend to produce yaw phenomenon , that is the practical application of projectile penetrating the vast majority with dip angle of attack and penetration .
And the inclination angle of attack will lead to the presence of penetrating ballistic deflection , seriously affecting the penetration depth and overload law elastomers and elastomer has the potential to withstand the high lateral loads and damage even ricochet phenomenon [ 1 ] .
Projectile Penetrating Concrete is a complex mechanical process transient .
Therefore, the actual properties of tensile compressive strength of concrete is not in numerical simulation of projectile impact on concrete targets on tensile failure must be properly considered in order to obtain results with the actual match .
Model Concrete with plastic , crushing many complex mechanical behavior , such as cracking , projectile and concrete are used eight-node hexahedral solid elements (SOLID164), with a single point of integration LAGLANGE algorithm.

It has small form factor, lighter body, the same as the unmanned aircraft capable of carrying a certain electronic equipment, with autonomous navigation flight skills.
We can make ​​use of the knowledge of the mechanical structure to put forward the following general rules: First, the structure and properties of the material should be adapted so that the internal force distributes; Second, in many of the mechanical structure, there is a vertical load in the axial direction of the rod; Third, the role of structure is to make load distribute and load transfer to the structure at the base, so that the load transfer path is shorter, more economical material. 2.2 Select the frame material The material of the frame and shaft is carbon fiber because choosing the material is based on the frame chassis design criteria and requirements.
Carbon fiber is a new material that has excellent mechanical properties, and its specific gravity is lower than that of steel 1/4.
The material is a carbon fiber sheet and its properties are as follows: Elastic modulus E= 2.3e11 Pa, Poisson’s ratio μ= 0.22 Establish simplified and rational model and then export it into ANSYS software ProE.
[5] zhumaotao,caibingfang,shurongjun, Dynamic Performance Analysis and Vibration Research ATVs frame[J], China Mechanical Engineering,2008(12)

Improvement of mechanical properties of light-weight corrugated core sandwich structures is a big demand in aerospace applications.
The mechanical performance of corrugated fiberboard is investigated by Yali Ma, 2014 [5] who concluded that fiberboard can be greatly affected by the height and wavelength of corrugation.
The average results of the properties of the specimens and the specific properties to weight ratios are listed in Table 2.
The skin with high mechanical properties (Table 1) undergoes elastic buckling under compression load after the debonding between skin and core.
While the core with low mechanical properties is subjected to plastic deformation as well as crack propagation.

These materials exhibit improvements of their thermal, mechanical, electrical, or any other property that is affected by structural variations.
The first one is material properties related and the second one is design requirements related.
In principle, by examining the effect of these two factors, we can either choose our desired properties from existing raw composite material and/or design specific favorite properties by assembling assumed homogeneous combination of different constitutes to suit our desired application.
Snead, “Thermophysical and mechanical properties of SiC/SiC composites,” Art. no.
On the influence of obstacles arranged in rectangular order upon the properties of a medium,” Lond.

In addition, the way the strain is partitioned in two-pass rolling cases affects the material stored energy with decreasing strain/pass providing the highest stored energy in the material after rolling and vice versa.
Introduction The control of the thermo-mechanical conditions imparted during hot rolling and the resulting microstructure in aluminum sheets is critical to determining the final sheet properties[1, 2].
Mathematical Model Finite Element (FE) Model A 2D thermo-mechanical model has been developed to simulate multi-pass hot rolling for aluminum alloys using the commercial finite element software package, ABAQUS.
This observation indicates that temperature is one of prime contributing factors to the strain partition effect illustrated in Figure 4.
It should be noted that changing the total strain during rolling in industrial practices affect the rolling load and can change the final sheet thickness and properties and thus application.

Design Consideration This Section details main factors considered in this paper. 3.1.
In general, welding may adversely affect the material properties and creation of stress concentrations by physical defects.
Sections at Header Weld From the assessment, adequate reserve factors against primary stress requirements of ASME III NH have been demonstrated.
With reference to Figs 16-19, seven bounding assessment locations are presented as follows: (i) Bounding position in the bend – Location B2, with 316L parent material properties; (ii) Bounding position in the header – Location H2, with 316L parent material properties; (iii) Bounding position in the guide tube – Location T2, with both 316L parent and 316 weld properties; (iv) Bounding position in the guide tube weld – Location T3, with 316 weld properties; (v) Bounding position in the tubeplate weld – Location TP1, with both 316H parent and 316 weld properties; (vi) Bounding position in the tubeplate weld – Location TP2, with 316 weld properties; (vii) Bounding position in the header weld – Location W3, with both 316L and 316 weld properties.
Since these damage factors are less than unity, there is no need to postulate the formation of a defect. 9.

It is known that springback seriously affects the dimensional accuracy of formed part, the process flexibility, the manufacturing cost, and the overall equipment effectiveness [4], so that the springback problem must be carefully addressed in design and development of new forming processes.
For a stretching-controlled bending process, one of the most important factors affecting springback is the stretching strain applied in the forming process, which is a major parameter determining how much springback reduction can be achieved [3].
The mechanical properties are obtained by tensile tests (as shown in Fig. 3 (a)) and described as follows: Elastic modulus is E=71,982 MPa, the 0.2% offset proof stress (initial yield stress) is σ0.2=146 MPa, the ultimate tensile strength is σb=266 MPa.
However, the overlarge stretching strain can simultaneously induce severe thinning, cross-section distortion, increased damage level, and other defects, some of which may affect product performance, for example, fatigue life.
In addition, the influential factors on springback in this forming process is more than stretching strain, the stretching-bending loading path may make difference in springback, which also needs a careful exploration, thus providing an in-depth understanding of the stretching-induced effect on springback.