Search results

Under normal circumstances the formation of surface wrinkling cannot be artificially controlled so that wrinkles or buckles are usually considered as the harmful factors to be eliminated in most cases [1].
Surface wrinkling appears until the compressive stress induced by thermal expansion during deposition is greater than critical stress which depends on film thickness and physical properties of film and substrate.
But the cracks don’t affect shape restoration.
Within reasonable limits, wrinkled surfaces can be transformed without affecting its performance. 50μm 50μm 50μm 50μm 50μm (a) (f) (e) (d) (c) (b) Fig. 4 Wrinkle evolution in an Au/PDMS bilayer under different strain: (a) Schematic diagram, (b) 0%, (c) 5%, (d) 10%, (e) 15%, (f) 20%.
Stafford, Surface wrinkling: A versatile platform for measuring thin-film properties, Advanced Materials, Vol. 23, Issue. 3 (2011) pp. 349–368

Nature-inspired superhydrophobic surfaces have received immense industrial and academic interest due to their non-wettability and self-cleaning properties.
These factors affect the etched shape profile and surface roughness that subsequently lead to an altered surface hydrophobicity.
ANOVA indicated that distance between nozzle and substrate, power, cycle time and some of their interactions were significant factors affecting water CA.
Furthermore, distance between nozzle and substrate, power and the interaction between the two were the main factors affecting CAH.
[2] Ehsani, M., et al., An investigation of dynamic mechanical, thermal, and electrical properties of housing materials for outdoor polymeric insulators.

The results revealed that by adding Portland cement, the mechanical properties of the mixture have improved where the UCS is found to be an important quality indicator.
The focus of this research is to assess the factors affecting the performance and strength of CTB based on laboratory using Unconfined Compressive Strength (UCS), Indirect Tension test for Resilient Modulus (ITRM) and Flexure Strength (FS) tests, which are the most frequently employed method of CTB in the assessment of the degree of stabilization.
One of the most important factors in CTB is organic content.
Dry density of the compacted soil is one of the main factors that influence the strength of the CTB.
Xuan, D.X., et al., Mechanical properties of cement-treated aggregate material – A review.

Quality improvement of the structure of thick sheets and plates, increasing the level of mechanical properties, minimization of energy and labor costs in the process of manufacturing could be achieved by using new methods of die forging and rolling with the implementation of severe alternating deformation.
In which connection, strain degree determines microstructure of metal and end-use properties of the workpiece essentially.
In which connection summary degree of strain is deficient and cast structural defect and nonuniformity of mechanical property appear in the plate [7].
Hot Forming of Steels and Product Properties. (2009) 165-174
Perig, Factors affecting the parameters of forging large forgings, Herald of the PNIPU.

., Ekaterinburg, 620016, Russia. 2 The Perm State Technical University, Centre of Science of Powder Materials, Perm, 614013, Russia a bulanov27@mail.ru bdmi_imet@r66.ru, ckrash@ural.ru dosa@pm.pstu.ac.ru submitted: 9 July 2008 revised: 26 August 2008 accepted: 26 November 2008 Keywords: Powder, Composition, Structure, Properties, Nanosystem, Homogenization, Mathematical modeling.
The obtained results will allow the reduction in the number of real experiments in the creation of new materials with required properties.
The objects of the study are powdered systems obtained by a method of mechanical alloying.
For the exploration of physic-chemical and physic-mechanical properties of the studied powder materials depending on the composition, temperature and caking time prototypes are fabricated by two-sided pressing in hard press molds.
Now there are no functions of such characteristics in an explicit form on which it would be possible to predict properties of composites or the conditions of their process engineering.

Each existing method has its own advantages and disadvantages, which are characterized by specific technical-and-economic factors determining effective areas of its application [1,2].
The total thickness of the heat-affected zone is 4 microns.
The implemented studies on mechanical properties of the system weld deposit/steel showed that the microhardness of the deposited coating remains unchanged throughout the depth up to (3.7...4.0) mm.
Fourthly, a sufficiently large quantity of g-iron, whose presence in the material reduces its strength properties.
Weld deposit and spraying, Mechanical Engineering, Moscow, 1985

Design and Application of High-Speed Variable Pitch End Mill based on Milling Stability SONG Qinghuaa, AI Xingb Key Laboratory of High Efficiency and Clean Mechanical Manufacture, School of Mechanical Engineering, Shandong University, Ji’nan 250061 P.R.
Tooth Engagement Factor and Milling Stability for End Mills Tooth Engagement factor.
Table 2 Modal parameters of end mill systems Mass M (kg) Damping C (Ns/m) Stiffness K (N/m) x 0.0609 0 7.990 0 1.820×106 0 y 0 0.0609 0 7.990 0 1.820×106 Analysis of Tooth Engagement Factors.
The workpiece material is made of aeronautic aluminum alloy with physical properties, Young’s modulus of elasticity E=70.3GPa and density ρ=2820kg/m3, and is clamped on the three-force component Kistler (Model 9275A) dynamometer, which is fixed on the table of the machining center.
In higher rotating speed regions, unbalance of the cutter system makes the spindle system yield an additional radial load, which is proportional to the square of rotating speed and affects the security and surface quality in high-speed milling process.

The results indicated that polyurethane foam modified by tung oil and starch has good thermal stability, good mechanical properties and good biodegradability.
Effect of different proportion of tung oil and starch on the properties of polyurethane foam was observed.
The mechanical properties of the samples were measured by a XWW-20CE universal material testing machine.
Effect of soil buried time on weight loss rate of PUF samples Conclusions PUF modified by an appropriate amount of starch and tung oil have better mechanical properties, thermal stability and biodegradability that pure PUF.
So the ratio of starch and tung oil is one of the key factors in preparation of biodegradable PUF, the most optimized ratio is starch/ tung oil= 3: 2.

So geological properties of dredger fill are closely related to the sediment sources, water quality conditions and other factors[9].
The mineral compositions of the clay group are mainly clay minerals, so the nature of the clay minerals has become an important factor affecting the soil geotechnical properties.
In some cases this can result in unstable chemical and physical properties of the soil, and at the same time, reduces the soil’s mechanical properties.
The dredger fill in Huanghua and Qingdao is a silt soil, and it is difficult to get its consistency factors, such as plastic limit and plastic index.
The former soils have similar granulometric composition, similar mineral composition, similar chemical composition and similar physical and mechanical properties, therefore they have similar geotechnical properties.

The original research was about the experiment on basic mechanical properties of EPS mixed with sand in Japan in 1989, from then on, study on EPS-soil has gradually developed.
For that reason, study on mechanical properties of EPS-soil as the wall thermal insulation material was carried out by our group, hoping to provide some reference frame for the field development.
We take some constitute materials of the EPS soil block as influencing factors in the experiment, it is a three factors four levels test.
Now you can see the affecting factors and levels in table 1.
EPS content and cement content are the significant factors which affects compressive strength of EPS-soil block according to the variance analysis.