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The structure and properties of the fiber surface directly determine the interface properties of the composite material, which in turn affects the mechanical properties of the composite material.
The flexural properties, interlaminar shear properties and compression properties of the composites were studied.
Good interface binding energy can effectively transfer the load, thus improving the mechanical properties of materials.
There are many factors affecting the compressive properties of carbon fiber composites, such as fiber mechanical properties, resin matrix properties and the interfacial bonding strength between fiber and resin matrix.
T700 carbon fiber reinforced epoxy resin composites have the best comprehensive mechanical properties

An Analysis on Influencing Factors of Interlayer Separation of Complex Roof in Deep Coal Mining Deyi Wu*，1 and Ailang Wang*,2 and Huaqiang Liang*,3 *Anhui institution of architecture and industry, Anhui Hefei 230022, China 1wudeyi136@163.com, 2ailanwang6712@aiai.edu.cn,3lhqcumt2000@163.com Keywords: Numerical simulation, Normal stress distribution of construction, Interlayer separation distribution of construction, Influencing factors on interlayer separation.
Through ANSYS program simulation by construction element and D-P yield criterion, influencing factors on construction normal stress and interlayer separation were analyzed, the results could be applied by engineering practice.
Layer Elastic Modulus /MPa Poissn Ratio Cohesive Force /MPa Internal Friction Angle/º Ⅱ 4E09 0.3 2.0 28 Ⅲ 4E09 0.3 5.0 30 Table 1 Rock mechanical parameters Figure 1 Simulation model The Influencing Factors on Construction Separation in Deep Mining Original Rock Stress.
Figure8 Normal stress distribution Figure9 Interlayer separation distribution in different rock thickness in different rock thickness Mechanical Properties of Construction Surface Construction Surface Cohesion.
Influence of mechanical characteristic of bedding surface on stratified composite rock mass.

Influence of fiber’s surface state on mechanical properties and fiber-matrix interaction of CFRP J.
The mechanical properties were measured from the flexural test.
In the present work, for understanding how the carbon fiber’s surface state affects the mechanical properties and fiber-matrix interaction at CFRP, the carbon fiber’s surface functional groups was modified by thermal treatment at different temperatures.
In the current work, the main purpose is to know how the thermal treatment of fiber affecting the fiber-matrix bonding properties which control the fiber-matrix interaction.
Conclusion The influence of carbon fiber surface composition on the mechanical properties and fiber-matrix interaction of CFRP was investigated by means of XPS analysis, flexural test and microstructure analysis.

Magnesium alloys present acceptable mechanical properties but their high temperature properties are unsatisfactory.
To achieve good mechanical properties these alloys are modified with zirconium.
Mechanical and structural properties were investigated.
This alloy guarantee good casting properties and weldability, connected with acceptable mechanical properties [2].
The mechanical properties of the alloys are presented in table 2.

Nevertheless, composite material properties depend on many factors such as fiber direction, length of fiber, matrix material and manufacturing process.
Introduction Mechanical properties can be improved by the combination of material, i.e. so-called composite materials.
For fiber-reinforced composite, the mechanical properties depend on many factors including properties of raw materials, volume fraction, length and orientation of fiber.
The work aims to study the effect of carbon fiber length and orientation on material mechanical properties.
Lin, Fabrication and Mechanical Properties of MWNTs/ Phenolic Nanocomposite, 2006

Polymeric materials are the most useful damping material, but they cannot be used alone for high damping structural fields due to their limited properties such as poor mechanical properties, high shrinkage ratio and limited acclimatization.
As a way of investigating the effect of fly ash on dynamic mechanical properties, we have aimed at fly ash/polymer composites as the damping materials.
The dynamic moduli and loss factors, as well as their microstructure were investigated.
Dynamic Mechanical Properties.
Here, we can see that the dynamic mechanical properties of composites are affected by the operating temperature and FA particle sizes.

The calculation results show that the damage evolution of the weld metal is affected strongly by the welding mechanical heterogeneity.
The effects of the mechanical properties of the base metal on the damage evolution of the weld metal decreases with the increase of the weld metal width.
Comprehensively considering the varies of the four factors, i.e. the yielding stress, strain hardening exponent, rupture strain, and weld metal width, the effects of welding mechanical heterogeneity on the damage evolution of the weld metal can be investigated in some degree.
For the other reason such as avoiding the cold cracking in the welding affected zone (HAZ), the under-matched welded joint can be used, in which the good property of weld metal with enough ductility must be satisfied.
The conclusions are shown as the following. 1) The damage evolution of the weld metal is affected markedly by the properties of the base metal near the weld metal.

Titanium significantly improves the mechanical properties, especially the ductility of a diecast Al5Mg1.5Si0.6Mn alloy.
We have carried out an assessment of the mechanical properties of an HPDC Al-Mg-Si alloy with different levels of titanium addition.
This composition can provide an excellent combination of mechanical properties in the as-cast state [5].
All the castings were left in ambient atmosphere and at room temperature for at least 24 hours before testing the mechanical properties.
The results, as shown in Fig. 1, reveal that Ti addition significantly improves the mechanical properties of the Al-Mg-Si alloy in the testing range.

The low carbon steels are smelted with special oxide introduction technique and the properties of HAZ has been studied with thermo-simulation.
The optical microscope and SEM were used to analyze the size, composition and distribution of the inclusions, the mechanical properties after thermo-simulation was also analyzed.
Furthermore, prior austenite grain size is also an important factor affecting the nuclei of IAF [4-5].
It also has been explained that the difference of low-temperature toughness from the factors such as inclusion's distribution, density and prior austenite grain size.
There are two reasons that oxide inclusions can promote the property of HAZ.

Tensile properties and fracture behavior of an AA6060 alloy were investigated at room temperature (295K) and cryogenic temperature (77K).
The changes in mechanical properties were thought to be due to a higher working hardening rate at low temperature, while the effect of strain rate on strain hardening was obscure at both temperatures.
Fig. 7b and c show the evolution of Schmid factors after 50% compression at a strain rate of 10-4s-1.
The Schmid factors are separated into different ranges and are represented in different colors.
Evolution of Schmid factors after 50% compression at a strain rate of 10-4s-1 at 77K and 295K.