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Introduction The bearing capacity of the structure decreased gradually because of the various natural factors and human error, etc.
Helical rib steel wires have good properties, such as ductility, tensile and shear strength and so on.
Test mechanical properties of helical rib steel wire are shown in table 1.
Test mechanical properties of rebars are shown in table 2.
The adhesive has high tensile, good properties on impact resistance, fatigue resistance.

However, nickel-based alloys are also regarded as some of the most difficult-to-machine materials due to their superior properties.
As a result of these properties, extreme loads of force and heat are imposed in the cutting contact zone between cutting tool and workpiece surface.
Cutting speed is believed to be the most important factor in BUE formation [3].
Besides, feed also affects worked materials deposition.
Cutting speed effects on residual stresses in end milling can be explained by that Inconel 718 has high mechanical properties, severe work hardening and poor thermal conductivity.

But the lack of its reliability in mechanical properties has been a critical problem preventing widespread structural applications.
The mechanical properties and fracture behavior were evaluated under bending tests.
The relationships between mechanical properties of Si3N4/BN multilayer materials and the geometrical factors, number of layers (N) and layer thickness ratio (λh), have been studied.
Calculated result about the mechanical properties with various layer thickness ratios [13].
Calculated results about the mechanical properties with various numbers of layers [13].

The influence of the piezoelectricity and piezomagnetism on the circumferential SH wave is investigated and the influential factors are analyzed.
Because the material properties vary in the thickness direction, the elastic constants of the medium are the function of thickness .
From these equations we can see that the influential factors of the piezoelectricity and piezomagnetism are similar.
Table 1 The material properties of the two materials Property C44 e24 q24 ∈11 Ba2TiO3 43 11.6 0 112 5 5.8 CoFe2O4 45.3 0 550 0.8 -590 5.3 Units: Cij(109N/m2),∈ij (10-10F/m2), eij (C/m), qij (N/Am), (10-6Ns2/C2),(kg/m3).
(b) The influential extent of the piezoelectricity and piezomagnetism on the SH wave in graded cylindrical plate can be easily affected by varying the gradient fields.

Introduction The application of the coal belt conveyor in coal mine became more and more popular these days because its properties of high efficiency, safety, easy to control, economic and durable, easy maintenance.
So in this occasion, it is not only a huge waste of human resources, but also the negative factors affecting production efficiency.
And when the auto mode can not run, you can manually start belt conveyor, without affecting the conveyance of the coal.
However, to the coal drop in local position, it’s not only necessary to accurately adjust the Coal Chute, and other mechanical position, install anti-blocking, anti-heap of coal, anti-coal drop sensors, but also reproduced conversion funnel in the junction of the tapes and installed obstacles around the coal when it was needed.

Introduction The coated tool is widely used in the cutting process owing to the benefits of good properties ,however some studies observed coating flaking and gaps between the coating and substrate after machining which affected the life of tool seriously[1].
The heat capacity of plastic deformation can be expressed [6]as Eq. (1) (1) where is the plastic work conversion factor, and is the plastic stains rate tensor.
The position will affect the damage of the tool greatly where special attention should be paid to insure enough bond strength between coatings and substrate.
The highest shear stress occur in the interface between coating and substrate in the highest speed which indicates cutting speed affect the crack of coated tool greatly.
Nouari, Finite element modeling of the thermo-mechanical behavior of coatings under extreme contact loading in dry machining, Surface & Coatings Technology 205 (2011) 3559–3566

Environmental factors: Faced with the increasingly serious environmental pollution, the tubular belt conveyor can be used flexibly and conveniently in harsh environments areas or in the urban area, and plays an important role both on environmental and economic benefits while in Energy Saving through the major technology simulation and technological innovation.
The rigidity is the key factor to tube formation.
The tubular belt should have good elasticity, longitudinal flexibility in addition to the special structure design which needs to guarantee the tube has good flexibility when the two sides overlap with each other Each layer of tubular belt should have excellent physical and mechanical properties.
The related properties in different ratio of the compound can be read in Table 1.
In consideration of the glue formula, process conditions and so on factors have different degrees of impact on adhesion, to meet the use requirements of the adhesion between layer, we conduct a series of experiments.

These properties make them good candidates as polymer electrolyte membranes for direct methanol fuel cell application.
For this purpose, PVA is a possible candidate because of its good chemical stability, film forming ability and high hydrophilicity and availability of crosslinking sites to create a stable membrane with good mechanical properties and selective permeability to water.
Table 1 Composition and properties of PVA/PMA composite membranes Membrane PMA (Wt %) Crosslink density (mol %) Thickness (µm) Conductivity (Scm -1) Diff.
j = jo exp (-Ea/RT) = A/T exp (-Ea/RT) where jo and A are pre-exponential factors and Ea the activation energy.
Further the flexible nature of this membrane with high conductivity, low methanol permeability, good thermal stability and mechanical properties, is highly expected as a promising proton conductive membrane for DMFC application.

Under medium impact wear condition, the material has obvious advantages, and the mechanical properties are also good[3].
According to some scholars[4], the internal factors of causing steel warpage are phase transition, yield stress and thermal conductivity.
According to some scholars[5], the internal factors of causing steel warpage are phase transition, yield stress and thermal conductivity.
The thermal properties change with temperature.
So the relationship of thermal properties and temperature must be considered.

Superduplex stainless steel alloy exhibit high mechanical and corrosion resistance, which main industrial application is in the petrochemical industry.
A good combination of properties is reached when the volumetric fractions of the ferrite (δ) and austenite (γ) phases are around 50/50 [3,4].
Welding in these materials is an important factor to be considered since the high temperatures achieved associated with a rapid cooling can alter volumetric fractions of the ferrite and austenite phases, as well as promote the formation of undesirable phases such as chromium nitrides, carbides, and sigma.
Low levels of ferrite (<25%) or high (>75%) may lead to decreased mechanical properties and corrosion resistance [5].
The microhardness measurement in welded joints is one of the main characterization techniques providing information of the hardness profile along the 3 zones, base metal (BM), heat-affected zone (HAZ) and fusion zone (FZ).