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In addition, adhesive bonding technique allows structural components with different mechanical and thermal properties.
The theoretical development of the model was presented and then numerical solutions of the governing equations for free vibration along with boundary and continuity conditions yielded the system natural frequencies, loss factors, and mode shapes.
It is also shown that the strength of the adhesive has a very significatant effect on the modal properties of the even modes of vibration but an insignificant effect on the modal properties of the odd modes of vibration[10].
The mechanical properties of the adhesive and adherends used in the investigations are listed in table.1.
The accelerometer mass does affect the natural frequencies of the single joint lap.

The authors have analyzed the parameters which affected the rib’s stability, such as span ratio, arch rib stiffness, boom stiffness and so on.
The first-order stability factors differ about 30% under the three kinds of conditions, showing that permanent loads still play a main role in the bridge stability under the operation phase.
Figure 8 is the influence of different span ratios on safety factor.
As shown in figure 8, in the process of the span ratio gradually increases from 1/12 to the l/4, stable structure factors first increased and then decreased, which is not a monotone increasing or decreasing process.
The problem how to simulate the mechanical properties of concrete filled steel tube is worthy of further research.

For FFS assessment the tensile and J R-curve data from a pre-strained pipeline material, API 5L X65 were obtained in the laboratory to study the influences of the large plastic strain on the material properties and the fracture resistance of the pipeline girth welds.
In this paper, material tests of the buckled pipeline was performed to study the influence of the large plastic bending strain on the material properties, and nonlinear finite element (FEM) analysis was performed to study the local stress distribution around the buckles or wrinkles.
The material properties of the pipe with such a large plastic strain will be drastically changed, and therefore the fracture resistance capacity of the pipe is expected to be decreased, especially when the damage is located at the seam or girth welds as shown in Fig. 3.
sea bed Girth weld Wrinkle profile R Material Tests of the Buckled Pipe In order to understand the influence of the local buckling or wrinkle bends on the material properties, the tensile and J-R curve tests were performed in the material technology laboratory of DNV Singapore.
According to this stress condition and the material properties of the 20% pre-strained specimens obtained from the tests, the buckled pipeline was assessed as per BS7910: 2005 [3], the critical flaw sizes were plotted in Fig. 8.

Utilization of Waste Heat of Circulating Cooling Water in Hot-stamping Power System Qin Panpan1, a,ChenHui2,b,ChenLili3,c,QuZhen4,Yu Luning5and Liu Shikui6 1,2,3,4 School of Traffic and Mechanical Engineering, Shenyang Jianzhu University,Shenyang,China 5,6 Liao Shen Indusstries Group CO.LTD Technology Reform Department, Shenyang,China ademipp34531@163.com, bchenhui@sjzu.edu.cn, c lilibitifull@126.com Keywords: medium frequency heating;heat transfer theory; circulating cooling water; recovery of waste heat.
In response to energy conservation and emission reduction policy of chinese government,the Group decides to update the technology on condition that don't affect properties of original production,will use heat pump to cool recirculating water of hot-stamping dynamic system. 1 Analysis of Production Process The original production process:Put roughcast which weighs 32kg into intermediate frequency induction furnace to heat to 1200℃.
When do the closing-in technology workers put workpiece into intermediate frequency induction furnace to heat to 1200℃.After closing-in technology workpiece is heated to 1200℃ again in intermediate frequency induction furnace to prepare for warmextrusion technology.Through closing-in and warmextrusion technology workpiece attains the required shape and properties.
If oil temperature is exorbitant,it can reduce the viscosity of oil, accelerates detrition of component part and even affects normal work of the system.
∵ ＜60 (3) ∴It needs to introduce a correction factor (4) Don’t consider compensating of difference in temperature, ∵coil is helical ∴It needs to introduce a correction factor (5) (6) W/(m2·K) (7) outlet temperature: t2=tw－(tw－t1)exp(－)=24.78℃ (8) heat release of coil: w (9) Fig.1 Principle of waste heat recovery system Fig.2 Size of intermediate frequency induction coil It can extract quantity of heat(Q1) from circulating water of hot-stamping induction coil per hour.

Joshi1,a, Vishwesh Dikshit2,b and Mubarak Ali3,c 1,2,3 School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore amscjoshi@ntu.edu.sg, bvishweshprof@pmail.ntu.edu.sg, cmuba0001@e.ntu.edu.sg Keywords: CFRP; GFRP; CNTs; CSMs; Low velocity impact; Inter-laminar failure.
These laminates exhibit excellent in-plane properties, but have weak out-of-plane properties that promote inter-laminar failures.
One of the primary factors affecting the impact damage initiation and growth in laminates is also the presence of weak inter-laminar region between the plies that are rich in resin [8].

Introduction The microstructure has a large effect on the mechanical properties of steel and for this reason, it is important to control grain structures in metals and alloys.
Due to the corrosion resisting properties of Fe-40Ni-Ti alloy, it is difficult to reveal the grain boundaries in specimens.
The major factors affecting the grain size are the heating temperature, holding time and alloying elements [9].

Analysis of the atmospheric particles governance based on aerosol hygroscopicity Tianyu Suna, Qingyang Wangb, Jian Zhangc and Jianxing Rend College of Energy and Mechanical Engineering,Shanghai University Of Electric Power, Yangpu,Shanghai, 200090, China asuntianyu588@126.com,b397646509@qq.com,cjinhanlin6330@126.com,dren608@163.com Keywords: Atmospheric particulates; Aerosols hygroscopic; Analysis Abstract.
Hygroscopicity is the main properties of aerosols, which is the water absorbing capacity of aerosol when the relative humidity of the ambient environment increases.
Relative humidity changes are the main factors affecting aerosols hygroscopicity, when the relative humidity reaches the deliquescence point, aerosols absorb a large amount of water leaving the particle size become large.
College Physics,2009,(8)：43-45 [6] Zhang Jihuai.Thermodynamic and molecular physics[M].Shijiazhuang:Hebei people's publishing house,1984：40-45 [7] Wang Xuanchen,Jian Hua,Wang Wei.Research status of hygroscopic properties of aerosol particles[J].China Powder Science and Technology,2010,16,(1)：101-107 [8] Gao Jian,Zhou Yang,Wang Jin,et al．Inter-comparison of WPSTM-TEOMTM- MOUDITM and Investigation on Particle Density[J]．Environmental Science,2007,28(9)：1929-1934 [9] Wu Dui .Re-discussion the difference between the urban’s haze and fog[J].

Conventional joining techniques like welding and brazing often result in undesired outcomes such as distortion, residual stresses, and diminished mechanical properties within the heat-affected zone.
Moreover, the application of cold/heat temperature processing techniques has gained attention for improving the mechanical properties of stainless-steel joints.
Heat temperature processing, on the other hand, involves heat treatment to relieve residual stresses and further improve the mechanical properties of the joints [17].
The factors were varied at specific levels to capture a comprehensive range of conditions.
Conversely, cold temperature processing induced more subtle deformations and grain transformations, albeit still influencing the material's microstructure and mechanical properties.

Introduction Light, as an important factor what affect the growth and physiological metabolism of the plant [1].
Both the light affect plant growth and development by energy (photosynthesis), but also affect the growth, development and differentiation of the plant as signals.
In the production, we could take advantage of the different properties of different biological materials for controlling growth of pepper differently.
In the production, we could take advantage of the different properties of different biological materials for controlling growth of plants differently
[7] Luo Youxin: Grey System Theory And Its Application In Mechanical Engineering( National Defense University Publishing, China 2001)

The solid/liquid phase evolution especially high temperature transformation will affect the inheritance behavior of microstructure for semi-solid steel.
Gleeble-3800 mechanical simulator was used to conduct the semi-solid controlled cooling process.
The phase property could help us understanding the phase transformation of M2 steel during semi-solid cooling.
The shape of solid particles tends to be oval with high roundness and the shape factor falls a high level around 0.84.
Li, Microstructural evolution and mechanical properties of 9Cr18 steel after thixoforging and heat treatment, Mater.