Search results

Premature failure of a spot welded joint can be difficult to be predicted but common factors that had been discussed in many research is related with fatigue and residual stress.
Process parameter is recognized as one of critical factors affecting the reliability and quality of a spot welded joint.
In experimental study, low carbon steel material was used as the specimen based on several factors.
The mechanical properties of the base metals were determined using a spark emission machine and using a standard tensile test in conformity with ASTM E8M [20].
Microstructures and mechanical properties of resistance spot welded joints of 16Mn steel and 6063-T6 aluminum alloy with different electrodes.

This investigation aims to determine the physical-mechanical properties of lightweight bidirectional sandwich-like composite wall panels made of bamboo (Dendrocalamus asper), melina (Gmelina arborea) and balsa (Ochroma pyramidale).
Compensation factors (CF) were calculated from the FEA results to adjust the experimental results due to non-uniform stress distribution (see Table 1).
From the FEA results, it was defined compensation factors (e.g. equal to 1,06 and 1,02 for compression and bending, respectively) that allowed adjusting the corresponding mechanical properties acquired from the experimental results (see Table 1).
[8] ASTM C393, Standard Test Method for Core Shear Properties of Sandwich Constructions by Beam Flexure, United States of America, 2011
[10] ASTM C273, Standard Test Method For Shear Properties of Sandwich Core Materials, United States of America, 2000

Influence of Tinning Material on Interfacial Microstructures and Mechanical Properties of Al12Sn4Si1Cu /Carbon Steel Bimetallic Castings for Bearing Applications M.
Previous researchers [1, 7, 9-10] have investigated factors that affect the bond strength in liquid-solid compound casting using the galvanizing, aluminizing and tinning processes on surface of solid steel or cast iron substrates.
Cooling rate of poured liquid, temperature of the solid substrate before pouring, the pouring rate and temperature of the poured liquid, the cleaning method of the solid substrate, as well as the tinning procedure (bath composition, temperature, soak time, etc.) are the most common factors affecting the bond strength of fabricated bimetallic castings.
In current research work three different tinning metallic materials are used to understand how these materials affect the quality of the interfacial microstructures , mechanical properties and metallic bond of Al-Sn-Si-Cu /carbon steel bimetallic castings for bearing applications.
Zhang, Microstructures and mechanical properties of AZ91D/0Cr19Ni9 bimetal composite prepared by liquid−solid compound casting, Trans.

At the present time, mechanical properties are usually tested through rod-shape specimen, but the mechanical properties of plate-shape specimen of P/M superalloy are hardly studied.
Up to now, there have been considerable interests in the study of material development of P/M superalloy [1-3], the microstructure and effect factors of development technology, the characteristics and reducing methods of defects [4-5].
For different type of mechanical property, the effect of shot peening is different.
The fracture pattern along PPB may hamper the mechanical properties. 5 Conclusions (1) Fracture strength, σb, and rate of elongation, δ5, were not affected by shape of specimen of P/M superalloy.
Solid solution temperature on properties of powder metallurgy superalloy [J].

Preparation and mechanical properties of C/SiC joints with pins or bolts Guangde Li 1,a, Changrui Zhang 1,b, Haifeng Hu 1,c, Yudi Zhang 1,d, Si’an Chen 1,e, Xinbo He 2,f,and Min Mei 2,g 1National Key Laboratory of Science and Technology on Advanced Ceramic Fibers and Composites, College of Aerospace and Materials Engineering, National University of Defense Technology, Changsha 410073, China 2School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China algd_nudt2003@163.com, bcrzhang@nudt.edu.cn, chfhu_nudt@nudt.edu.c, dyudizhang2002@yahoo.com.cn, esianchennudt@gmail.com, fxb_he@163.com, gmeimin1985@163.com Keywords: C/SiC composite; Joints; Pins; Bolts; Mechanical properties Abstract.
The stripping properties of the joints were determined by adhesive bonding method with 0.5mm/min crosshead speed.
Results and Discussion Properties of soft pins and C/SiC bolts The properties of φ3mm soft pins and M3 bolts were shown in Table 1.
Fig. 2 Photos of (a) M3 bolt and (b) φ3 pin Mechanical properties of C/SiC joints The stripping properties of C/SiC joints, which are affected by not only the joining methods, but also PIP cycles after joining the substrates and pins/bolts together, were listed in Table 2.
The inherent tensile strengths of pins or bolts are major factors due to the pins or bolts themselves rupture, meanwhile the tensile strength of pins is obviously higher because of the higher fiber volume percentage, more beneficial fiber array direction to bearing loads, larger stress area and more dense matrixes as well.

Effect of discharge energy and material properties on surface integrity are presented in this paper.
It features excellent mechanical properties, such as high durability in high strength applications with moderate temperatures, excellent strength-to-weight ratio, excellent corrosion resistance and excellent fatigue properties etc.
The mechanical properties of Ti-6Al-4V are shown in Table 1 [1].
These physical, chemical or mechanical properties lead to that titanium alloy is a kind of difficult-to-machine materials by traditional machining methods [3-6].
The region affected by these thermal changes is referred to as the heat-affected zone (HAZ).

On early properties of high performance spray material Yuezhong LIN Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation (Shandong University of Science and Technology) Qingdao China 266590 Jcssust0@163.com Keywords: high performance spray material mechanical properties Abstract: This text used double fast cement, and fly ash, and high performance polymer and fiber for main material and plus agent for has high performance spray material of preparation and research, by distribution out of material has following advantages: condensation time fast, and short-term and late strength high, and dry shrink volume minimal, and stick poly sexual strong, and waterproof, and back bomb rate small, and seal performance very good, and has must of flexible, and using range wide.
Spray materials with high mechanical degree, fast construction period, savings in manpower and so on.
Test results Test in the keep cement, and fly ash, and sustained coagulation agent, and plastic of agent for does not variable factors, its benchmark ratio for: cement 0.7, fly ash 0.3, sustained coagulation agent 0.5% (to cement volume), plastic of Agent 2%, and main insurance agent, and polymer and the fiber of mixed with volume on high performance spray material of effect, to accurate research its effect used L9 (33) orthogonal test design [4], orthogonal test design see table 3.2.
Best ratio Through the above groups of tests, we can reach the best ratios shown in table 3.5, ultimate high performance spray material properties shown in table 3.6.
Beijing: coal industry publishing house, 1999 [3]Qiu Jianyou,Song Zhaoqian, Application of wet spraying technology in roadway analysis [J], management of mine pressure and roof, 2003.3,P41-43 [4]DONG Ruhe, XIAO Bihua, FANG Yongshui, THE THEORETICAL ANALYSIS OF ORTHOGONAL TEST DESIGNS[J], Journal of Anhui Institute of Architecture & Industry, 2004.12.P103-106 [5] GB/T50081-2002, Mechanical properties of ordinary concrete standard [s], Beijing: China architecture and building press, 2003

Wu d National Key Lab of Science and Technology on Surface Engineering, Lanzhou Institute of Physics, Lanzhou 730000, China a renni@sina.com.cn, bMazj.2007@yahoo.com.cn, czhaodongc@163.com, dshenghuwu@163.com Keywords: Diamond like-carbon, Fe-doped, multilayer, mechanical properties Abstracts.
The mechanical properties of Fe-DLC films were characterized.
The results show that the Fe ion implanted multilayer significantly improves its mechanical properties.
The peak value of C 1s is affected with many factors including the element species and the chemical coordinate.
From the above results it can be found that the tribological properties of the Fe doped DLC multilayer is superior over the single layer DLC.

In the models, mortar and blocks are given different material properties and simulated by contact elements and plane elements respectively.
In order to solve the problems, the zero-thickness contact elements provided by software ANSYS were used to simulate the mechanical properties of gray mortar joints[7,8].
Top beams were simulated by plane42 and their material properties were defined as concrete.
Gray mortar joints are the most important parts to the mechanical properties of masonry structures, so choosing a suitable unit for mortar layer is very critical.
While the finite element analysis didn’t take into account these factors, which made the deformation of finite element calculation smaller.

River pollution has been a global issue and the consequences of polluted rivers are significantly affecting human health and well-being.
The rate of water consumption, on the other hand is increasing due to a few major factors, which include urbanization of rural areas, increasing population size and climate changes [1].
Properties of Fluid.
Thus, freshwater properties are considered for analysis.
Fig. 6 Water Density Properties.