Search results

The fatigue failure process is influenced by the external factors, which also affects the static mechanical characteristics of the materials, and the response characteristics of the materials under the external factors are also affected.
Under the cycle load, the material properties must be degraded.
The macro-mechanical properties under difference pre-compression tests were compared and analyzed.
The mechanical property degrades because of the present of the cracks.
[5] Jancheng Tang, Yuehui He and Wenshen Liu, Factors Affecting the Room-Temperature Tensile Properties of TiAl Alloys with Fully Lamellar Microstructures, Rare Metal Materials and Engineering. 3 (32) (2003), 209-212

The results showed that the Ca2P2O7 could apparently decrease the sintering ability and mechanical properties of β-Ca3(PO4)2.
The previous studies have shown that the biological properties, sintering ability, mechanical strength, thermal stability and degradability of the Ca-P based bioceramics could be strongly affected by the chemical composition of Ca/P molar ratio [2-5].
The distinct characteristic of the microstructure and RD of β-TCP bioceramics doped with CPP additives might result in quite different mechanical strength and other properties.
With the increase of CPP additives, the RD decreased gradually, which resulted in the decrease of the mechanical properties.
The addition of CPP resulted in a significantly decrease of the sintering ability and mechanical properties of β-TCP bioceramics.

The sorption which affects the volumetric strain is taken into consideration and the pore pressure is also been studied as a key factor for permeability and other relative parameters.
Fig.1 Schematic of bidisperse coal pore structure showing macro- and micropores containing gas in free and adsorbed[4]. 1.1 Mechanical equations for dual-porosity model Mechanical equilibrium of the solid phase is governed by the balance of linear momentum (1) The relationship between strain and displacement can be expressed as (2) For the physical process of gas flow in coal seam, taking gas sorption or desorption induced strain into account, we get Navier type equation[10] (3) For the dual-porosity model, if we use the cubic model consisting of several cubes put together, to represent coal（See Fig.2）, the mechanical properties of coal are affected by the fracture.
From the results of the volumetric strain, it can be seen that the matrix swelling which may be induced by adsorption or desorption is the dominant of all the factors. 5.
,chemistry may also important factors which affect the permeability and should not be ignored in the future work.
CO2 storage and gas diffusivity properties of coals from Sydney Basin, Australia.

For enhanced mechanical properties of ceramics for structural application, a great deal of attention has concentrated on preparation of layered composites.
Introduction In order to enhance mechanical properties of ceramics, e.g., strength and toughness, multi-layered type composites processing method was developed.
Therefore, residual stress which is generated at interfacial region is one of the important factors of affecting mechanical properties of composites.
Table 1 Mechanical properties and Flexural strength of monolithic and layered composites Material Mechanical properties Flexural strength Monolithic composite (20% vol.% ZrO2) E=348Gpa, ν =0.26, α=9.8(10 -6/K) 250MPa (sintering at 1600 O C) Residual stress 3-Layered composite 300MPa (at interface) 323MPa (sintering at 1600 O C) (a) Schematic view of bending test (b) FE model for damage analysis Fig. 2 Analysis model of bending test Fig. 3 Comparison of the damage distribution under same load level (1,200N) (left: Monolithic composite, right: 3-Layered composite) Comparison of Monolithic and Three-layered Composites In this paper, the mechanical performance of the three-layered composites having residual stress has been evaluated using the developed simulator.
The Mechanical properties and flexural strength of monolithic and layered composites are given in Table 1.

The Surface Mechanical Attrition Treatment (SMAT) was first used to generate nanocrystalline layers on the elementary plates so that their mechanical properties were improved.
It shows excellent anticorrosion properties but poor mechanical strength.
One potential solution to this problem is to apply a mechanical surface treatment to improve its mechanical strength without affecting its anti-corrosive properties.
Measuring the mechanical properties of the oxides is difficult because of their limited volume and non-homogenous structures.
In order to control the nature and frequency of the shear banding, the mechanical properties and dimensions of the base metals and the oxide are considered as important factors.

Analysis of variance (ANOVA) was used for identifying the significant parameters affecting the responses. 1.
In actual practice, there are many factors which affect surface roughness and tool wear, such as cutting conditions, tool variables and work piece variables.
Cutting conditions include cutting speed, feed and depth of cut where as tool variables include tool material, nose radius, rake angle, cutting edge geometry, tool vibration, tool overhang, tool point angle etc. and work piece variable include material hardness and other mechanical properties [7].
These factors and three levels are given in Table 2.
The experimental results were analyzed with ANOVA which is used for identifying the factors which significantly affecting the performance measures.

Results of research showed that running speed of strip and finish rolling temperature were main factors affecting accuracy of coiling temperature.
Introduction Coiling temperature greatly affects microstructure, mechanical property, physical property and machinability of hot rolling strip [1-3].
Cold rolling products would inherit this inhomogeneous microstructure, causing mechanical property of products unqualified and product yield to decline.
In order to remove inhomogeneous microstructure and mechanical property between head/tail and middle part of strip, U-type cooling process is adopted.
Conclusions (1) Running speed of strip was one of the main factors affecting accuracy of coiling temperature.

Mechanical properties of cemented reticulate red clay were studied in present research.
Test results show that: (1) shear strength of cemented reticulate red clay increase exponentially as the increasing of cement content; (2) shear strength of cemented reticulate red clay decrease polynomially as the increasing of water content; (3) mechanical properties of cemented reticulate red clay affected significantly by curing time and curing confined pressure.
Cemented reticulate red clay was used in geotechnical engineering in recent years [9], while, many aspects of mechanical properties of cemented reticulate red clay remain unknown.
After cured for a certain amount of time under a designed cuing condition, the mechanical properties of the cemented reticulate red clay were tested.
Xi: Experimental study of the physical and mechanical properties of Cement Reticulate Red Clay, Master's Thesis, Central South University (2011) (in Chinese)

The solid state connection method, it produces welds with reduced distortion and improved mechanical properties.
The austenitic stainless steels are wide employed in completely different industrial applications like building, nuclear trade and automobile industries owing to their special mechanical and metallurgical properties.
The sensitivity equations were obtained by differentiating the developed empirical relation with respect to the factors of interest such as Friction pressure, Forging pressure and rotational speed, which were explored here.
The dependence of crack properties on the Cr/Ni equivalent ratio in AISI 304L austenitic stainless steel weld metals.
The dependence of crack properties on the Cr/Ni equivalent ratio in AISI 304L austenitic stainless steel weld metals.

The cell assembly technology skillfully combined with the sol/gel transition mechanism about chemical and physical crosslink of gelatin-based hydrogels, in consideration of the main forming factors, through controlling the extruded materials rheological properties and optimizing the forming process, thereby achieved a promising assembling process with high cell survival rate and its corresponding biological viability.
In the sol state, they can be crosslinked into a gel by changing or adding some exterior factors (i.e., temperature, ultraviolet, chemical agent).
Compare to the physically crosslinked gels, the chemically crosslinked gels usually provide a more stable physical/chemical performance with better mechanical properties because of their stronger bonds [18].
Gelatin, a degradation product of collagen, exhibits reversible thermosensitive gelation properties and can be irreversibly crosslinked with glutaraldehyde.
The main factors affecting this process are gelation time and conglutinate property.