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Also the factors such as restricted manufacturing accuracy, indispensable clearances at joints, elastic distortions and other stochastic factors, always cause the theoretical feasible optimal solution unfeasible[3].
By introducing the conception of mechanism solution regions, both the mechanism solutions and their properties can be exhibited on the finite coordinate plane.
All the above causes affect mechanism function by modifying link dimensions.
Feasible mechanism solution region D0¢ in which solutions satisfy conventional constraints can be obtained by taking appropriate calculating step to get solutions and computing their properties of interest.
Erdman: Journal of Mechanical Design Vol. 113 (1991), p. 3 [4] C.

Their high performance and fireproof properties have made them excellent candidates as matrices in advanced composites for strengthening.
This is mainly attributed to one of the most important drawbacks of AAMs, the difficulty to produce a specific mixture, since the affecting factors are profuse.
§ AAMs can have comparable or even better properties over their cementitious counterparts, indicating promising perspectives for total replacement of cement in future strengthening applications
Structures, Processing, Properties and Industrial Applications, Woodhead Publishing, 2009, pp. 194-210
Y., Hao, X., Fan, W., Experimental study on high temperature properties of carbon fiber sheets strengthened concrete cylinders using geopolymer as adhesive, Procedia Eng. 135 (2016) 47-55

And then variation of shear angle and friction angle affect the values of force coefficients.
Almost all titanium alloy monolithic components in aerospace industry are manufactured by milling process, and cutting force is one of the most important factors that influence the machining efficiency and surface quality.
Fang [15] investigated tool-chip friction in machining with a large negative rake angle tool and found that an increase in the tool-chip friction factor increases the friction angle.
In this paper, assumptions are listed below: a) Tool edge radius is zero. b) In the cutting process, the influence of the inertial force caused by the material deformation is negligible. c) The mechanical properties variation of the material caused by the cutting temperature is negligible.
Shear angle and friction angle determines the force coefficients, therefore, variation of feed per tooth will affect precision of cutting force prediction.

In order to study various factor affecting durability of steel fiber reinforced concrete (SFRC), basic experimental research that combine the action of freezing-thawing cycles and deicing salt to SFRC was conducted.
The reinforced actions of steel fiber on splitting strength of concrete are notable and the influence of steel fiber volume fraction on the frost-resisting property is obvious.
Introduction The last 20 years, steel fiber has been applied widely in the professional fields of civil engineering, water conservancy and construction step by step, owning to the excellent properties of high strength, durability, ductility and so on.
There are many experimental studies at home and abroad show that steel fiber significantly improve most mechanical properties of concrete[1-2], but its influence on durability of concrete requires further study.
The influence of steel fiber volume fraction on the frost-resisting property was obvious.

Study on Impact Fatigue Life of 42CrMo Steel with M+F Dual-Phase Structure Bolin HE 1, a , Yingxia YU 1, b and Eryu SHAO 2, c 1 School of Mechanical & Electrical Engineering, East China Jiaotong University, Nanchang 330013, China 2 Material Institute, Henan University of Science and Technology, Luoyang 471003,China a hebolin@163.com, b yuyingxia@163.com, c shaoeryu@haust.edu.cn Keywords: Impact fatigue; Undissolved ferrite; Dual-phase structures; Fatigue property; Failure mechanism.
The effect of undissolved ferrite amount on impact fatigue properties and failure mechanism were studied by using 42CrMo steel with subcritical quenching process The amount of undissolved ferrite were 0%, 10% and 15%, respectively.
Introduction Microstructure is one of important factors which affect the fatigue properties and fatigue life.
The effects of undissolved ferrite on impact fatigue properties and fatigue life were discussed.

Adding strains to semiconductor materials affects semiconductors' physical properties and performance.
This research can broaden insights regarding the strain influence on the electronic properties of TiO2 anatase using DFT as a computational method.
This distortion can affect the material's properties, such as structural and electronic properties.
Fu, Electronic and Elastic Properties of the Tetragonal Anatase TiO2 Structure from First Principle Calculation, Optik. 206 (2020) 164342
Pandey, A Review on the Factors Affecting the Photocatalytic Degradation of Hazardous Materials, Mater.

China axwf1982@mail.nwpu.edu.cn, bjinhliu@nwpu.edu.cn, cdchen@ryerson.ca, dluanguohong@cfswt.com, eyaojunshan149@yahoo.com.cn Keywords: Friction stir welding; aluminum alloy; tensile properties; strain hardening.
Microstructures, tensile properties and work hardening behavior of friction stir welded (FSWed) AA2219-T62 aluminum alloy (in its one-third bottom slice of a 20 mm thick plate) were evaluated at different strain rates.
The main changes in the tensile properties of the welds were explained via the differences in the strain-hardening behavior which controlled the strength and resistance to plastic localization.
More recently, Chowdhury et al. [10,11] examined the effect of pin tool thread orientation and weld pitch on the tensile properties and strain-hardening behavior of FSWed AZ31B-H24 Mg alloy.
Tensile Properties.

Introduction Iron aluminides represent an intriguing class of new materials: they offer a good combination of mechanical properties, specific weight/strength ratio, corrosion and oxidation resistance and low raw material cost [1-3], which makes them potential candidates for the substitution of stainless steel in applications at moderate to high temperatures.
The development of new, more ductile Fe-Al alloys depends on a thorough understanding of their properties, implicating a better comprehension of the properties and behavior of defect in these materials.
b) material after self-decomposition process and milling c) material after self-decomposition process The Fe-Al (Fe-rich) samples were obtained from Armco iron, aluminum of 99,99% purity, and a small amount of other additives added in order to improve the thermal and mechanical properties of alloys.
A comparison of point defects concentrations in materials obtained by various methods (melting, self-decomposition and milling) indicates a complexity of the factors influencing the defect structure of the materials.
Munroe (1996) Processing, Properties and Applications Proceedings of ASM, 96 [3] J.L.

Dynamic time sweep of rotational rheometer has been used to study the variation in rheological properties of polymers with time.
The results confirmed that the shear stress of PCS melt was readily affected by temperature alteration.
Introduction The strain control rotational rheometer, quipped with different methods of steady, transient and dynamic tests, has been maturely applied to study rheological properties of polymers.
During the process, melt spinning is a key step impacted by rheological properties of PCS melt.
Temperature control was an important factor on PCS melt rheological test.

The Compilation of Nonlinear Analysis Program for Externally Prestressed Concrete Beams Huiju Cai1, a, Jianmin Zhou1,b and Ying Gao1,c 1 Department of Civil Engineering, Tongji University, Shanghai, China, 200092 acaihuiju@tongji.edu.cn, b tjzhou2008@163.com, c gascan2002@163.com Keywords: External prestressing; Mechanical behavior; Nonlinear analysis Abstract.
In order to popularize the application of external prestressing technique in green retrofit projects, it is necessary to have a depth exploration on the mechanical behavior of externally prestressed concrete beams by numerical simulation method.
Numerical simulation analysis method enables designers to have additional comprehensive understand for the mechanical characteristics of either structure or component, and therefore both designing and constructing measures would be close to the reality with good performance.
Verification Program In order to popularize the external prestressing technique’s applications in green retrofit of existing structures, and further understand the externally prestressed concrete beam bending property, especially in low-strength concrete beams, Tongji University conducted the experimental research with 12 simply concrete beams strengthened with external prestressing[1].
(a) beam L1-1 (b) beam L1-2 Fig.5 Load-deflection relatives from numerical simulation and test Conclusions 1) Based on the analysis methods of both geometric nonlinear and material nonlinear, the nonlinear analysis program for externally prestressed beams has been compiled. 2) Compared with the experimental results from 12 concrete beams, the verification results indicated that the nonlinear analysis procedure could clearly simulate the mechanical performance of externally prestressed concrete beams. 3) The external prestressing technique is a very important technical measure in the green transformation of existing buildings, through this program it was able to make reconstruction projects more reasonable and economic with advanced analyses in possible affecting factors in structures during reconstruction processes, together with the changing rules of bearing capacity, stress increments and deflection.