Search results

The optimal setting of the production process is a crucial factor that affects the quality, cost and productivity of injection moulding.
Production can be optimized by changing and modifying the following factors:[3,4,5] - The phase of the dosing can be optimized by adjusting of screw speed and back pressure
The study of these factors helps to prevent the geometric errors.
Optimization of the size and the length of the retaining pressure is a convenient way to optimize these factors.
[10] Pasko, J. et al.: Influence of technological parameters of die castning on qualitative properties of castings, In: Manufacturing engineering and technology, no. 1, (2010), p. 3-6.

Numerical Simulation of Sheet Metal without Burr in the process of Blanking Based on DEFORM for Manufacturing Engineering ShuTian Fan1, a, Yong Wu1, b 1 School of Mechanical Engineering, Jiangsu University, China astfan@ujs.edu.cn, bwywxnjzj@163.com Key words: Blanking;Burr-free; Numerical Simulation;Clearance Abstract.
No matter which kind of blanking process is adopted, even if we improve the strength and thickness of material, the clearance and other factors, the burr can be only limited to a certain height, and we still unable to avoid the generation of burr.
And it has a relationship with the thickness and properties of material, perimeter of blanking pieces, sharp degree of blade, punch-die clearance and other factors.
It shows that the blanking force is not significantly affected by the gap under normal circumstances.
It is illustrated that the clearance has little effect on blanking force under normal circumstances. 3) The quality of blanking is affected by the length of shear zone, with the increase of clearance, the length of shear zone presents the tendency of decrease.

The asphalt mixture is a viscoelastic material, the main factors which affect its mechanical properties are loading and temperature.
Loading conditions are not easy to control, so temperature becomes the dominant factor to solve rutting.
Considering factors which like phase change temperature, phase change latent heat, thermal conductivity coefficient, volumetric change rate, volatility, boiling point and so on, myristic acid, palmitic acid, PEG 4000 are chosen and the thermal properties parameters are shown in Table 1.
Figure 16 indicates that the natural phase change fatigue of rutting specimen affect the results because of bad weather.
Conclusions When PCMA is at PCT or higher temperature range, the viscoelastic properties and corresponding road performance is deeply influenced, so the import mode is abandoned.

In this paper, the operating principle and properties of MFDMs are briefly presented based on our previous work [5-7].
When subjected to a magnetic field, the suspended particles affect the flow properties of the carrier fluid.
The varying magnetic field in turn affects the equipotential surface thus providing means to control the shape of the magnetic fluid surface.
The susceptibility of the magnetic fluid volume to mechanical vibrations is one of the most obvious concerns associated with use of MFDMs.
For applications that require the AO setup to be positioned on a moving platform, the mechanical vibrations as well the strict requirement of keeping the MFDM surface horizontal remain the prohibiting factors.

Application of a variety of software construct co-simulation environment, establishment of model of thin seam shearer cutting unit rigid-flexible coupling multimode system, do correctness verification to model from speed characteristics and mechanical properties.
Reflect the meshing harmonics of the force curve, the phase difference between the curves, in line with the characteristics of planetary transmission, the prototype model of the mechanical properties of the basic line with theoretical requirements.
Through comparative analysis, with the thickness and width size of inclusion increases, the force of the key part tends to poor, in both directions, the larger the size , the more the number of teeth in cutting, with the alternating cutting pick, coal mining generates great shock and impact, which is important factors of causing damage to key parts.
Table 4 The most value of the principal stress through planetary axis with different material properties and simulation Planetary shaft material Modulus（MP） Poisson's ratio （1） Density Allowable Stress（MP） Most value of principal stress（MP） A 2.06E5 0.3 7.84E-6 371.167 324.2628 B 2.09E5 0.28 7.85E-6 500.269 328.4077 C 2.08E5 0.236 7.87E-6 422.27 334.3918 Conclusion 1) Application of Pro / ENGINEER, MATLAB, ADAMS, ANSYS and NSOFT structural co-simulation environment, the establishment of the prototype model with thin seam shearer cutting unit rigid-flexible coupling, do correctness verification to model from speed characteristics and mechanical properties, and static simulation to get the ultimate convergence of the prototype system. 2) Load on the prototype model and simulate, get the stress distribution , the value principal stress, the value time and the corresponding Node of the flexible parts , identify the weak links of the key components .The value Node of the most flexible
Change the size parameters of iron sulfide inclusions, verify the reliability of the prototype model at the same traction speed, get the weak links of the prototype are the planetary axis. 4) Compared simulation to planetary axis given different material properties, analyze the simulation result and the force characteristic ,conclude the best material choice of planetary axis is material B.

Studied the effect of matrix and fibers (casing) interface damage evolution and fracture processes on the mechanical properties of the cement sheath, determined the scale degumming, found the main factors which affect degumming length, which provide reliable design basis for improving the well casing repair technology.
Composite mechanical model and basic assumptions Cement loop interface damage can be simplified as mechanical model shown in Fig.1, in which a for casing inner diameter, b for casing outer diameter, in the range of Rrb ≤≤ ，is composite material (matrix) composed by formation and cement loop.
Because volume fractions of formation is much larger than that of cement loop, the mechanical properties of composite materials which composed by cement loop and formation can be obtained: m fG G= ， m fγ γ= ， m fE E= Where: , ,ff fG Eγ and mmm ,, EG γ are the shear modulus, Poisson's ratio and elastic modulus of composite material.
While the degumming work of cement loop is determined by its own physical and chemical properties, which shows in another angle that the cement loop performance greatly influenced its damage, therefore, in order to improve the well repair, not only to focus on improving the repair well technology, but also improve the performance of cement loop.
Conclusions Established the fiber - matrix composite mechanical model which set hollow fiber as casing, set cement loop and earth as composite matrix, and educe stress and displacement formula for fiber - matrix.

Generally, mechanical and structural properties of RCA concretes are known to be inferior to those of natural aggregate concretes.
Consistent with the adverse effects of using RCA in concrete, leading to inferior mechanical properties, studies also show the durability characteristics of RCA concretes to be similarly adversely affected.
Saha, Effect of Recycled Aggregate on Mechanical and Durability Properties of Concrete, Intl.
Zhang, Mechanical properties of recycled aggregate concrete under uniaxial loading, Cem. and Concr.
Degeimbre, Mechanical and durability properties of concrete using contaminated RAs, Cem. and Concr.

Simultaneously, there is a very limited number of scientific works taking the time stability of products of solidification process into account, which is decisive in terms of durability of the solidification process products and assurance of constant properties.
As second suitable sorbent appeared reaction fission powder from natural bentonite (Sorbent 1) with characteristic high content of montmorillonite - an active mineral determining its excellent sorptive properties.
Test specimen – Formula H Fig. 2 Test specimen – Formula L Once the specimens hardened sufficiently (first monitoring interval according to suggested methodology - 28 days and then 180 days) they were laboratory tested to set testing methodology; within the first phase physical and mechanical properties were checked.
Acknowledgements The paper has been prepared with the financial support of the project CSF 14-31248P “The study of the inbuilt hazardous waste impact on the cement matrix properties”.
Factors affecting hazardous waste solidification/stabilization: A review, Journal of Hazardous Materials B137 (2006) 267–276 [5] QIAN, G., CAO, Y., CHUI, P., TAY, J.

The field measurement is done at the laboratory Block E, Faculty of Mechanical and Manufacturing Engineering at Universiti Tun Hussein Onn Malaysia (UTHM).
Several factors such as the road surface, types of vehicles and speed will induce the wave propagation to the building [1].
Finite Element Modelling (FEM) Laboratory building E block at Faculty of Mechanical and Manufacturing Engineering (FKMP) is a two-storey building which is near to G3 block.
In ANSYS, every element is assigned with material constant to define structure properties in term of density, poison ratio and modulus of elasticity.
The floor assessment which referring to the VC curve performance indicated that vibration is most affected at the middle of the floor.

When used under mechanical environments such as vibration, this gold soldered joint will seriously affect the reliability of the whole product.
Through study the physical properties, mechanical properties and microstructure of Sn-3.5Ag0.6Cu eutectic solder, it is believed that the brazing joint using Sn-3.5Ag0.6Cu solder has good tensile strength, shear strength, creep resistance and thermal fatigue resistance.
And it is found that these plate-shaped chemical compounds were the main reason for the decrement of mechanical properties.
Electric transportation properties of the high speed rotation exact electric ring under high temperature and vacuum environment [J].
Microstructure and properties of joint of H62 brass soldered using tin-lead solder[J].