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The study of rheological and mechanical properties of the Antarctic krill protein/sodium alginate fibers Jing Guoa, Xuecai Lib, Yuyan Zhangc, Li Zhang, Chunfang Yu , Fucheng Guan, Zhichao Wang.
The rheological properties of spinning solution was tested by Brookfield DV-C digital viscosimeter at 30～60℃.
Tab.1 Orthogonal experimental results Test number Factors breaking strength /（cN.dtex-1） A B C 1 3 1:9 5:1 1.51 2 3 2:8 4:1 0.37 3 3 3:7 3:1 0.28 4 3 4:6 2:1 0 5 4 1:9 4:1 1.24 6 4 2:8 5:1 0.61 7 4 3:7 2:1 0.48 8 4 4:6 3:1 0.34 9 5 1:9 3:1 0.72 10 5 2:8 2:1 0.77 11 5 3:7 5:1 0.91 12 5 4:6 4:1 0.44 13 6 1:9 2:1 0.46 14 6 2:8 3:1 0.33 15 6 3:7 4:1 0.19 16 6 4:6 5:1 0.61 range 0.313 0.634 0.492 The range table can obviously show the biggest influencing factor in the spinning process conditions on the fiber mechanical properties: AKP solution and SA solution ratio > Cacl2 and PEG ratio > SA concentration.
Impact of AKP solution and SA proportion: Effect of components on mechanical properties in the final analysis is the influence of the compatibility of the two components to fiber performance.
Increasing SA concentration can also improve the mechanical properties of gel[4], but higher concentration leads to higher liquid viscosity and bad Liquidity, and not good for spinning forming ,The mechanics performance of the fiber is poor and even solution is unstable when concentration is lower than a certain value. 4%～5% of dope solution is better for the forming ability and mechanical property.

Introduction Wood is the most abundant and widely used material with excellent mechanical properties in spite of its low density [1].
The mechanical behavior of wood is strongly affected by the complex anatomy of the material, and properties such as stiffness and strength are influenced by the wood internal structure at several structural levels.
Crack growth is affected by crack locations, loading directions, material stiffness and strength properties, etc.
The factors, such as the orthotropic parameters, the different strength ratio and stiffness ratio between the earlywood and the latewood of the annual rings, impacting on the plastic zone and fracture properties are discussed.
Chui: Factors affecting mode I fracture energy of plantation-grown red pine.

Experiment Research on Influence Factors of Ring-opening Polymerization in Making PDLLA Song Liu1, a, Lina Sun2, b 1North China Institute of Science and Technology, Yanjiao, Sanhe, Hebei, China 2North China Institute of Science and Technology, Yanjiao, Sanhe, Hebei, China aliusong715@yahoo.com.cn, bsunlina1943@ncist.edu.cn Keywords: PDLLA, ring-opening polymerization, influencing factors Abstract.
The paper research on the factors of the lactide polymerization, which primarily were ontology purity, dosage of initiator, polymerization temperature, time and vacuum degree, etc.
As the fracture fixation materials, the key is to guarantee the initial mechanical strength meet the demand of repairing cancellous bone fracture, this research is study on synthesis of high molecular weight poly lactic acid process conditions.
The mechanical properties cannot satisfy some biological medicine requirement.
In the lactide ring-opening polymerization process, the main affecting factors are the purity of monomer, initiator concentration, temperature and time of polymerization, polymerization vacuum degree, etc.

The mechanical properties of PBXs are dependent on strain rates and temperature.
Dagley et al. [13] studied the effects of strain rate and temperature on mechanical properties of PBX.
The size effect is also one of the important factors affecting the stress uniformity in the specimen.
Size effect is the important factor that affects the stress uniformity in the specimens.
Finally, the dynamic tensile mechanical properties of PBX material were obtained

Material Properties Parameters Effect on Crack Threshold Zhenhua Yi School of Civil Engineering , Shandong University , Jinan 250061 , China ; Zhenhua_yi@163.com Key words: fatigue crack threshold; mechanical properties; stress strength factor; crack propagation size; plastic zone size Abstract.
In addition, it is impossible to consider all effect factors in formula due to many factors affecting on threshold.
The structure designers must use the material properties, mechanical parameters and design theories to design components.
Moreover, the threshold is not only related with the material properties, but also with other factors, such as loading conditions, temperature and environmental media.
（2）The crack threshold formula is related with the material Yield Strength, Elastic Modulus and Poisson Ratio, which is showed that the tensile properties of material are decisive factors for the crack threshold

Mechanical Properties and Fatigue Resistance of 3D Printed Inconel 718 in Comparison with Conventional Manufacture Ivo Černý1,a, Jan Kec1,b, Tomáš Vlasák1,c, Luboš Remar1,d, Miroslav Jersák1,e and Miroslav Zetek2,f 1SVÚM a.s., Tovární 2053, 25088 Čelákovice, Czech Republic 2University of West Bohemia, Faculty of Mechanical Engineering, Univerzitní 8, 30614 Plzeň 3, Czech Republic aIvo.Cerny@seznam.cz, bkec@svum.cz, cvlasak@svum.cz, dremar@svum.cz, ejersak@svum.cz, fmzetek@kto.zcu.cz Keywords: Direct Metal Laser Sintering, Inconel 718 alloy, microstructure, mechanical properties, fatigue durability, creep.
The paper contains results of the first stage of experimental programme aimed at an evaluation of microstructure, mechanical properties, fatigue durability and creep of the first batch of Inconel 718 samples manufactured using the 3D printing technology, Direct Metal Laser-Sintering (DMLS).
It is a net-shape process, producing parts with high accuracy and detail resolution, good surface quality and usually good or even excellent mechanical properties, at least according to technical manuals of manufacturers of DMLS facilities.
One of the most important factors affecting the printed material quality is input powder.
Creep resistance looks to be the weakest point of this printed material and steps to improve the properties will have to be undertaken.

This research aims to investigate the properties of elastohydrodynamic rotational lubrication analysis on journal-bearing systems.
The simulation shows that the significant factors are bearing width, oil temperature, viscosity, and bearing clearance.
The main objective of this investigation is to perform the numerical simulation of EHD lubrication on the MBD properties of journal-bearing systems.
The material and oil lubricant properties used in this model are shown in Table 3.
The material and oil properties Parameter Value Composite Elastic modulus 680000 Pa Elastic Factor 0.003 Dynamic viscosity 0.0271 Pa-s Pressure viscosity 1.98x10-8 Pa-1 Fluid density 0.858 g/cm3 Simulation Results Figure 4 shows the friction torque under different shaft speeds and different loads.

Weld parameter is an important factor affecting micrographic structure and mechanical properties of weld joints.
Weld thermal cycle affects micrographic structure and mechanical properties of weld joints.
Weld heat input is an important factor affecting weld thermal cycle 1.
The chemical composition and mechanical properties of welding materials are also shown in Table 1 and Table 2.
Mechanical properties of experimental materials.

The bar extruded at 370℃ shows the best microstructures and mechanical properties.
Thus it has the partial features of direct extrusion and ECAP process to some extent, and would be affected by the factors of ECAP process.
Mechanical properties.
According to the comparisons of microstructures and mechanical properties of ES process at different temperatures, it is found ES process at 370℃ could produce the best microstructures and mechanical properties.
It is found ES process at 370℃ could produce the best microstructures and mechanical properties.

The present study evaluated the mechanical properties in compression parallel to grain of five pieces of wood from the roof structure of a residence undergo the fire in the rural area of Itapeva/SP.
Due to the diversity of Brazilian native woods and the factor that each species has a different mechanical behavior of each other in various applications, it is necessary to study the strength and stiffness in mechanical stresses of these species at high temperatures, aiming that projects of wooden structures can offer greater safety in case of fire.
The factors affecting the ignition of wood are well known in general: dry wood, thin wood pieces, and light wood species ignite quicker than heavy species [2].
The softening of the polymers is accompanied by significant changes in mechanical properties, especially the modulus of elasticity influencing the mechanical performance of wood [3].
These values showed a little contradictory, since with the loss of mass due to the thermal degradation it is expected the existence of a decrease in all resistances, as pointed out by Figueroa and Moraes (2009) and Eurocode 5 [9], which conclude that temperature inversely affects the mechanical properties of wood.