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This makes their numerical implementation difficult and may affect the efficiency of the time-domain BEM.
The symmetry properties of the fundamental solutions (22)-(24) are utilized to enhance the efficiency of the present Galerkin-method and to reduce the numerical cost to the level of the collocation method.
The following contraction index notation is used for the material properties Cijkl → Cαβ, elij → elα, hlij → hlα, (55) where α = { i if i = j 9 − (i + j) if i ̸= j , β = { k if k = l 9 − (k + l) if k ̸= l
As discussed in the first example, the normalized dynamic intensity factors start from a non-zero value for the investigated combined electrical and mechanical impact loading.
In the special case of a static loading the maximum electrical and magnetic intensity factors are obtained for the impermeable crack-face boundary condition while for a transient dynamic loading the electrical and magnetic intensity factors increase with the electrical permittivity and the magnetic permeability for a pure mechanical loading.

Fully deformed zone (100x) (b).Heat affected zone (200x) Fig.5.
[3] Sahin Mumim (2007) Evaluation of the joint interface properties of austenitic stainless steel joined by friction welding.
[4] P.Sathiya, S.Aravindan, A.Noorul Haq (2005); Mechanical and metallurgical properties of friction welded AISI 304 austenitic stainless steel, Int.
[5] D.Ananthapadmanaban (2009); A study of mechanical properties of friction welded mild steel to stainless steel joints, Mater.
[8] Afes Hakan, Turker Mehmet, Kurt Adem (2007); Effect of friction pressure on the properties of friction welded MA956 iron based super alloy.

The shear-relative slip curves were measured and all the relevant mechanical properties such as slip moduli and shear capacities were calculated.
GluBam owns special laminate structure of bamboo fibers and excellent mechanical properties compared with bamboo veneer.
The main mechanical properties of GluBam are almost the same as GluLam which was a type of engineered lumber product using structurally graded timber laminations [2].
The shear-relative slip curves were measured and all the relevant mechanical properties, such as slip moduli and shear capacities were calculated.
Experimental research on mechanical properties of GluBam [J].

Study on fracture behavior of steel strip under cold rolling forming process based on GTN damage model CHEN Jianjun1, a, YAN Yuxi1,b, SUN Quan1,c and PAN Hongliang1,d 1 Mechanical and Power Engineering Department, East China University of Science and Technology, 200237, China achenjj@mail.ecust.edu.cn, byyx2116@163.com, csunquan0501@gmail.com, dhlpan@ecust.edu.cn Keywords: rolling forming, crack propagation, GTN model, damage Abstract.
The phenomenon of edge cracking is complicated and it depends on macroscopic factors such as roll radius, reduction ratio, lubrication or friction, tension and mechanical properties as well as on microscopic factors such as microstructure and surface micro-topography.
The hardening properties decrease due to the increasing of the coalescence rate of void which depends on the factor fF and the void volume fraction fF can be obtained from the metallographic examination as shown in Fig. 1.
So the tension force is a very significant influence factor affecting the crack propagation during the cold rolling forming.

The shear characterization of the prepreg and the investigation of the factors influencing the representative shear stiffness including sample geometry, strain rate, conditioning and temperature are discussed.
Because the forming temperature will affect several properties of the final composite part including shrinkage, thickness variations, warping tendencies, and residual stresses, it is important to characterize the shear behavior as a function of temperature.
Thus, temperature dependence along with other factors that influence the empirical measurements (e.g., strain rate, sample geometry, and conditioning) will also be investigated in the current research.
Factors that influence the shear stiffness were investigated including strain rate, sample geometry, conditioning and temperature.
Therefore, only primary runs of a specimen should be used to evaluate the shear properties of the textile.

Many in-depth researches on mechanical properties by fiber orientation of the existing the fiber reinforced composites have been carried out [1~3].
The regular relationship between the interlaminar stress and strain distribution and the fatigue life has not been observed because the delamination was greatly affected by the fiber orientation.
The stress transfer from the crack tip of Al alloy sheet to the fiber was accomplished along the fiber orientation and it greatly affected the delamination pattern.
The da/dN and ∆K relationship due to the fiber orientation The effect of the fiber orientation on the crack growth rate (da/dN) and stress intensity factor range (∆K) will definitely examine.
[5] Takamatsu T., Matsumura T., Ogura N., Shimokawa T., Kakuta Y., "Fatigue Crack Growth Properties of a GLARE3-5/4 Fiber/Metal Laminates," Engineering Fracture Mechanics, Vol. 63 (1999), pp. 253~272.

Introduction The thermo-mechanical behavior of soils have been investigated for several decades [1-10].
Some buildings are located in the area affected by elevated temperature.
Simulation of Variation in Factor of Safety of Soil Slope with Temperature and Matric Suction Material Properties.
Lagurous, Effects of Temperature on Some Engineering Properties of Clay Soils, Proceedings of an International Conference on Effects of Temperature and Heat on Engineering Behavior of Soils, Highway Res.
Uchaipichat, Experimental Investigation and Constitutive Modelling of Thermo- Hydro-Mechanical Coupling in Unsaturated Soils, PhD Thesis, The University of New South Wales, NSW, AUSTRALIA, (2005)

Introduction Fiber placement route modeling process is a complex one including multiple sections, affected by numerous factors, and with a vast area of involvement.
Especially the complex components surface, the coupling relationship of the geometry structure of component surface, materials and the mechanical properties of placement layers must be taken into account in the meantime.
Blom has put forward geodesic algorithm used to plan placement route of component with revolted surface, but it is not enough to study the placement route planning only by the surface features for aviation component and wind turbine blades and other components with complex curved shape, because it will cause great gap between fiber placement direction and mechanical direction of placement layers, which may lower the structure properties of components [2].
Since the tow band very thin (0.125-0.2mm), doesn’t affect the placement feasibility of fiber tow, but will bring about bending deformation of the fiber tow in the width direction and affect the placement feasibility [4].
Thus, is obtained by the triangle circumcircle properties

After extender chain, the mechanical properties and thermal stability of PBT could be significantly improved.
After adding 20%-40% glass fiber, PBT not only can keep its original advantage, but also can greatly improve mechanical properties.
The results show that the content of LCI could affect the miscibility, crystallization and mechanical properties of PBT/PP blend.
The factors which affecting elastomer toughening are mainly related to the structure, particle size and the interface bonding strength of PBT, etc.
Generally speaking, physics, the better the mechanical performance of ABS is, the better mechanical properties of the alloy are [23].

But most of natural biological materials, the mechanical properties are poor and cannot maintain an appropriate shape after implantation.
These polymers can be tailored to produce a wide range of mechanical properties and degradation rates.
In contrast, when PLGA concentration was too low, the mechanical properties of scaffolds will become poor.
It will be affected that how much cell quantity the scaffold can load and how long the biological material degeneration produce will be, and mechanical properties of scaffold.
It is the most important thing that can keep biological properties of materials from affected.