Search results

Figure 1 shows that the glass substrate heat-affected zones (HAZ) generated by laser light can be divided into two transient zones and one quasi-steady-state zone.
Considering Fig. 2, the general energy equation for an isotropic and homogenous material, with constant properties and negligible heat losses, is reduced to (2) where a= kc /ρ.
The thermal weight function is a universal function similar to Bueckner’s WF for mechanical loads.
This means that thermal loading is better able to induce crack growth than mechanical loading.
Bueckner, A Novel Principle for Computation of Stress Intensity Factors, Z.

The non-thermal means the strong reaction with electrical property that microbial cells show in electromagnetic field, which break chemical bonds that maintain the connect of biological macromolecules, inactivate and denature biomolecules, and break cell walls though some kind of mechanical destruction [5, 12, 13].
The energy, power, actuation duration as well as sludge water ratio and other factors affect the sludge disintegration effect of microwave.
He researched using the uniform design test methods, and found that the influence on sludge SCOD increment rate order of various factors is: moisture content > microwave energy consumption> microwave radiation time.
The factors that affect the sludge pyrolysis were the property of the sludge, the pyrolysis equipment, the using of catalyst and the technological conditions.
The main factors having influence on the result of sludge disintegration by high-pressure homogenization are homogenization pressure, homogenization frequency, and sludge concentration etc.

Experimental and Finite Element Study on Mechanical Behavior of Bolted Joint with Bolt Clearance in Transmission Tower Binrong Zhua, Haijun Xingb and Jingbo Yangc China Electric Power Research Institute, Xuanwu District, Beijing 100055, China azhubinrong@epri.sgcc.com.cn, bxinghj@ epri.sgcc.com.cn, cyjb@epri.sgcc.com.cn Keywords: bolted joint, joint slip, bolt clearance, finite element analysis, experiment Abstract.
Eventually, through a comparison of FEM and test results, the factors that affect bolt slip and the changing relationship of axial force of bolt and friction force is described.
In addition, to determine the mechanical model of bolt shear slip is also the research foundation of vibration and joint fatigue of tower.
Standard tension coupon tests are conducted to determine the mechanical properties of the steel angle sections.
The results show that the FEM model can result in accurate description of the slipping process of the bolted joint, and is validated to stimulate the loading property of bolted joint, which can be generalized to the joints connected by other specifications of the bolts and plates.

The Cu-Ni-Al and cast-iron substrates are used for their thermal properties in glass mold industry.
The role of the Ni based alloy is to protect the mold without affecting its thermal properties (Heat Affected Zone (HAZ)).
The substrate materials are chosen for their good thermal properties [2].
Zhang, Additive manufacturing of metallic components – Process, structure and properties, Prog.
Dai, Analysis on the physical mechanism of laser cladding crack and its influence factors, Optik (Stuttg). 127 (2016) 200–202. doi:10.1016/j.ijleo.2015.10.043

Under external loads, the interface of FRP-concrete will emerge inevitable internal force redistribution, and the FRP plate is a kind of resin material and its physical and mechanical properties will change with temperature and time.
In recent years, many domestic and foreign experts and scholars put forward the method which used FRP sheets or plates to strengthen the bridge and research on its mechanical behavior [1-7].
The temperature and creep effect are the main factors impacting on the working mechanism of FRP.
Material Properties of FRP FRP is a kind of compound material, which is made of multi-strand continuous fiber with epoxy resin as base material by gluing, extruding and drawing.
The elastic modulus of FRP plate affected by temperature and time is defined by the equation as below

Mitsuhashi: “The structure and mechanical properties of sheets prepared from bacterial cellulose.
Part II Improvement of the mechanical properties of sheets and their applicability to diaphragms of electroacoustic transducers”.
Gatenholm: “Mechanical properties of bacterial cellulose and interactions with smooth muscle cells”.
Hestrin: “Factors affecting production of cellulose at the air/liquid interface of a culture of Acetobacter xvlinum”.
Bielecki: “Factors Affecting the Yield and Properties of Bacterial Cellulose”.

The static mechanical properties of spindle system and modal analysis are studied with different spring element arrangement forms.
Schmitz used finite element method to study the spindle system dynamic performance [6]; Rantatalo noted that softened the stiffness of the bearing as an important factor affecting the dynamics characteristic of spindle system [7]; Sun Wei compared the dynamics characteristic of spindle speed [8].
Table 2 Critical Rotary Speed n in Different Order (r/min) Order 1 Max Working speed 2 sets 78707 12000 3 sets 81456 12000 5 sets 85260 12000 Summary Spindle bearing uses a spring-damper unit simulation, finite element model on the construction of main shaft and bearing, under the analysis discusses the spring element arrangement static mechanical characteristics of spindle system, and modal analysis.
Integrated thermo mechanical dynamic model to characterize motorized machine tool spindles during very high speed rotation.
JOURNAL OF MECHANICAL ENGINEERING. 48(2012) 146-152

The study on mechanical properties of karst tunnel Bin Li a, Taiyue Qi b School of Civil Engineering, Southwest Jiao tong University, Chengdu, Sichuan province, China aphdlibin@foxmail.com, bqitaiyue58@126.com Key word: Karst tunnel; Deformation of lining; Safety coefficient; Finite difference Abstract: Several numerical models were built by FLAC3D to simulate tunnel with karst around spandrel, tunnel with karst around springe, tunnel with karst around inverted arch and tunnel with karst around side wall.
The results from the numerical modeling suggest as follows: karst around spandrel has extremely unfavorable effect on the deformation of lining and the safety of surrounding rock above the vault, karst around side wall also seriously affect the stability of tunnel due to the asymmetry pressure on tunnel caused by karst, consequently, auxiliary measures should be taken to handle these two cases; karst around springe and karst around inverted arch has limited adverse influence on the overall safety of tunnel, backfill measures are enough to handle these two cases.
Minimum safety factor method for stability analysis of surrounding rock mass of tunnel[J].
Karst around inverted arch mainly affected deformation of lining at inverted arch.

On the other hand, mechanical properties of the sample, namely hardness was increased.
Since microstructural change is affected by the formation of bright-circle structure, diffusion of Mo element becomes the controlling factor [5,10].
Hence, an enhancement of hardness in the alloy is affected by α phase.
Yuehui, Microstructure and mechanical properties of powder metallurgy Ti-Al-Mo-V-Ag alloy, Trans.
Fujita, A.O., Chiaki Ouchi, H.Tajima, Microstructure and properties of titanium alloy produced in the newly developed blended elemental powder metallurgy process, Mater.

There are many factors that affecting the bending springback.
Scheme of Bending Intelligent Control for Quadrangle Plate There are many factors that affecting the quadrangle plate bending springback based on the research of theory, numerical simulation and experimental research.
Material properties and working parameters, which include hardening exponent , strength coefficient , normal anisotropy , elasticity modulus , Poisson’s Ratio and friction coefficient , are identified by neural network in the early stages of bending.
According to the material properties and friction coefficient identified at the beginning of 10mm, the optimal blank holder is predicted by neural network, and then control the blank holder force by the hardware and electrical signal.
Journal of Mechanical Engineering Vol 42 (1), (2002), p.234