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Table 1 Physical and mechanical properties of used fibers Fiber type Molecular formula Molecular weight [g/mol] Linear density [dtex]* Tensile load [cN] Elongation [%] Tenacity [cN/dtex] acrylic C3H3N 53 8.9 24.1 58.3 2.7 polypropylene C3H6 42 4.9 19.0 123.3 3.9 nylon 66 C12H22O2N2 226 6.7 52.7 15.2 7.9 *dtex = decitex, which is the mass (g) of 10000m of certain fiber.
In fact, two factors affect work of adhesion; interfacial interactions and loss function (i.e. ability of energy waste at the interface).
It should be noted that loss function is dominant factor in work of adhesion [7-9].
Li, Age effect on the characteristics of fiber/cement interfacial properties, J.
Standard Test Method for Tensile Properties of Single Textile Fibers.

Kitada, Magnetic properties of immiscible Co-Ag and Ni-Ag thin films prepared by co-sputtering, J.
Yaschak, et al., Properties of titanium-tungsten thin films obtained by magnetron sputtering of composite cast targets, Thin Solid Films, 257(1) (1995) 1. ].
The results of experiment show different factors (such as different substrates, thermal treatment) have influence on the morphologic and structural properties of W films, which were analyzed by scanning electron microscope (SEM) and x-ray diffraction (XRD).
Spolenak, Alpha-vs. beta-W nanocrystalline thin films: A comprehensive study of sputter parameters and resulting materials' properties, Thin Solid Films, 577 (2015) 26-34. ].
Chen, et al, Crystalline orientation dependence of nanomechanical properties of Pb (Zr 0.52 Ti 0.48) O3 thin films, Appl.

Therefore, we synthesized biodegradable phosphorylated pullulan to develop a biomaterial that combines primary properties such as high biocompatibility, good bonding potential to hard tissue, high strength, biodegradability, and osteoconductivity.
A previous study had reported that CP induces unwanted heterotopic ossification because of its osteoinductive properties [8].
These properties also make pullulan suitable as a bioadhesive [19].
These factors affected on depression of solubility of the sample in water.
Mueninghoff, Calcium phosphate cement: review of mechanical and biological properties.

Introduction Titanium (Ti) and its alloys have widely been used in orthopaedic and dental surgery due to it relevant mechanical properties, high corrosion resistance and biocompatibility [1].
However, this method has to perform at high temperature of 550oC and this could be a possible drawback of the study since this could affect to the properties of the implants.
Coating on rough Ti with a bioresorbable layer could provide the surface excellent tissue response and osteoconductivity without interfering the mechanical properties of the implant material.
The important factors for converting CaO to CaCO3 are the presence of water to dissolve the CaO, and the presence of CO2 to produce CO32- , in proportion to Ca2+ to promote the formation of CaCO3.
However, the use of those high temperatures could deteriorate the implant mechanical properties due to coefficient of thermal expansion.

In this context, all the manufacturing enterprises have been actively developing new techniques to produce new type aluminum-plastic composite panels, and have significantly improved the fireproof and flame-retardant properties of the products on the basis of ensuring all the performance levels of the products being acceptable.
Taking comprehensive consideration of such factors as development status of domestic products and coordination with international advanced standards, the Author deems it necessary to revise the test methods of nitric acid resistance so as to adjust to the requirements of more coating systems
(2) Roll peel strength is an important indicator to reflect the bonding performance of metal base and core material and is under influence of many factors such as raw materials and compound processes.
It is suggested that the enterprises, when engaging in the research and development of new type flame-retardant aluminum-plastic composite panel, give consideration to the mechanical property change of products, the study to the appropriate proportion of low density polyethylene and inorganic substances (metal hydroxide/metal oxide) is critical to consider both mechanical property and burning behavior indicator of products
It can be concluded that flame retardant level of core material is the decisive factor for the burning behavior of aluminum-plastic composite panel, while the most critical factor to affect flame retardant level of core material is the heat of combustion of core material.

Concrete is compound body consisting of solid, liquid and gas, whose durability is affected by many factors, such as environment, loads and itself materials[1].
Cleanliness indexes mainly impact the interface bonding between coarse aggregate and cement mortar, thus affecting the erosion rate of corrosive media, which include powder adsorption on coarse aggregate surface and clay content.
The greater the clay content is the more weakening of interface properties is.
Zhou and Barr B.I.G: Fracture properties of high-strength concrete with varying silca fume content and aggregates.
Properties of Fresh Concrete, Edited by H.J.Wierig,1990 [5] A.

The results showed woven glass fibers with clay powder together significantly increased the mechanical properties of PMMA.
Over the years, several studies have been done to improve the mechanical properties of polymethyl methacrylate PMMA.
Incorporation of different sorts of additive affect values of mechanical properties.
Fatah, Effect of Reinforcement of High Impact Acrylic Resin With Zirconia on Some Physical and Mechanical Properties, Rev. de Clin.
Ahmed, Effect of Al2O3/ZrO2 Reinforcement on the Mechanical Properties of PMMA Denture Base, Journal Reinf.

Introduction High-power marine gearbox is one of the important equipments for marine engine systems, its load condition is also relatively complex and often subject to large torques, bending moments, and even accompanied by the effect of the impact forces, there may result in certain aspects of the system to malfunction or damage, and even affects the whole transmission system running [1,2].
Table 1 The material properties of the circular saw Name Density(ρ/Kg·m-3) Poisson ratio(µ) Elastic modulus(E/*105Mpa) HT250 7150 0.26 1.40 Fig. 3 The radial force distribution Fig. 4 FEM modal for the gearbox case Results of the modal calculation.
The topology optimization is a structural design method through the finite element analysis and optimization method solves constraints within a given region of the design space[5,6].The SIMP method introduces a hypothetical relative density variable between 0 and 1, and assuming the macroscopic elastic constants of the material and its density is non-linear relations, using penalty factor constraint inhibition ranged between 0 and 1 units.
Tan: Manual of Mechanical Vibration, China Machine Press, China, (2000)
Chen: China Mechanical Engineering, 2004, 15(21): 1886~1890.

Introduction Owing to its excellent mechanical properties, FRP has been widely used in such fields as aviation, aerospace and automobile.
Its static strength accords with the Rayleigh distribution[6] (Figure 3), and the probability density function and the distribution function are respectively: ; (7) Fig.2 The growth of fiber breakage rate Fig.3 The distribution function of fiber static strength For the actual single ply, because of such influencing factors as the uneven laid fibers and remaining thermal stress, the fiber strength is far from the ideal condition shown in Figure 3(a).
Fiber Breakage in the Laminate Since the elasticity modulus of the fiber is far larger than that of the matrix under the tensile load of the single ply, it can be assumed that the matrix crack doesn’t affect the longitudinal stiffness of the single ply, but for the laminate with off-axis layers, the matrix crack produced by the off-axis layers will result in obvious drop in the stiffness of the laminate.
Meso-Mechanical Ana lys is of Stif fness Reduction of FRP Laminates by F ibre Breaking.

Investigation the Ultrasonic Vibration on Tin Soldering Welding of Copper Wires and Plates Thanh-Hai Nguyen1,2,a*, Truong Dang Khoa1,b, Bui Duy Khanh1,2,c, Dao Duy Qui1,2,d, and Hoang Ba Cuong3,e 1Faculty of Mechanical Engineering, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, Vietnam, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Vietnam; 2Viet Nam National University of Ho Chi Minh City (VNUHCM), Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam. 3The Research Laboratories of Saigon High Tech Park Lot I3, N2 Road, Saigon High Tech Park, Thu Duc City, Ho Chi Minh City 700000, Vietnam ahaint@hcmut.edu.vn, btdkhoa.sdh19@hcmut.edu.vn, bdkhanh@hcmut.edu.vn duyqui@hcmut.edu.vn, ccuong.hoangba@shtplabs.org *Corresponding author: haint@hcmut.edu.vn Keywords: ultrasonic welding, ultrasonic soldering, copper soldering, curved reflector.
Kago et al. developed ultrasonic soldering device using 28 kHz and 150 W for increasing the properties of Sn-Bi alloy.
Soldering time and temperature are the two major factors affected to the joint strength and reaching highest value at 45 s.
Figure 3: Ultrasonic soldering welding equipment – (1) Ultrasonic generator; (2) Heat controller; (3) Ultrasonic transducer & horn; (4) Mechanical frame; (5) Tin tank; Copper plates with 10x2 mm2 are dipped in the liquid soldering tank.