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Fractures are caused by several factors including injures and mechanical impact, traffic accidents, fatigue caused of the muscles cannot absorb energy such as walking too far, and also bone weakness due to cancer and osteoporosis [2].
However, HA has a weakness in its mechanical properties, namely brittle.
A high macroporosity can increase the bone formation, but if the values are higher than 50% it will result in the loss of mechanical properties of biomaterials [8].
High macroporosity could improve the bone formation, but values that are higher than 50% could result in the loss of mechanical properties of biomaterials [8].
Firstly, the duration of clotting affects the size of the macroporous and its mechanical properties.

In order to discuss the mechanical behavior of the pavements in the opening process, the finite element model of the pavement system on the Haihe Bridge being built in Tianjin China was built, and the mechanical response in the opening process was calculated.
The bridge deck pavement is an important part of steel bridge deck system, its quality will affect driving safety, comfort, bridge durability and investment returns.
The mechanical analysis can reveal the stress-strain state of pavement layers and deformation characteristics, and consider a variety of structural and environmental factors on the impact of stress state of pavement.
No matter the force or the cross-sectional form of the girder structure, the mechanical property of pavement of bascule bridge is significantly different from the long-span suspension bridge and cable-stayed bridge.
The mechanical response of pavement with different pavement thickness of 30mm, 40mm, 50mm and 60mm is analyzed, as shown in Fig. 5.

The properties including density, foam distribution and static compressive properties of this material were analyzed.
The major influence factors on the properties of hemp haulm foam material were the particle size, foaming agent and adhesives, etc.
Results and discussion Influence factors of the material cushioning property.
Fiber powders size showed to affect the cushioning properties with the influence of the internal link status.
The influence factors of the material cushioning property were particle size, starch content, foaming agent dosage, filler dosage, etc.

It was mainly through engineering geological investigation to analysis the main factors affecting the stability of the slope, possible deformation failure mode and failure mechanism; In order to give qualitative[5] descriptions of a stability stage and development trend of evaluated slopes, there needed to analysis the cause and development of geological bodies that had been deformed, combined with previous experience in engineering.
At the same time, it is gradual to realize that many factors that affect the deformation and failure of landslide has a lot of uncertainty, such as rainfall, groundwater, earthquakes and human factors.
Review status of stability analysis and evaluation methods of landslide After entering into 1980s, due to the level of computer technology greatly improved and advances in research of mechanical properties of rock mass, methods for landslide stability analysis become more ,and the result also becomes more accurate.
Because there exist many and complex uncertain factors that affect the stability of landslide, uncertainty analysis method has a fast development and achieved a lot.
Many factors that influence landslide are random, such as groundwater, precipitation etc..

It was estimated that over 90% of all melt-blown (MB) nonwoens were made from polypropylene (PP), because of its low cost, ease of processing, good mechanical properties, lack of heat shrinkage, chemical inertness, and its ability to be drawn into very fine fibers.
Among them, Poly(lactic acid) (PLA) appear to be the most attractive because of high mechanical properties, thermal plasticity, fabric ability, and biocompatibility[2].
Liu reported [3] the influence of production processing on the structure, morphology, and mechanical properties of PLA MB.
Rheological behavior of polymers is one of the important factors affecting processability and the properties of final products.
However, few researchers have focused on the study of rheological properties of PLA and PLA composites for MB nonwoven.

In order to study the effect of temperature changes on the dissipative properties of materials, two approaches are used.
An analysis of the above-mentioned studies shows, that when studying the effect of temperature on the deformation properties of materials using the hereditary theory of a viscoelastic medium, often turns out to be inconvenient, since calculations are very difficult for non-isothermal processes, and for nonlinear processes, the temperature shift factor depends on both temperature and voltage [12, 13].
Problem Statement The purpose of this work is to investigate the effect of temperature changes on the dissipative properties of materials.
Slavikov, Improvement of the experimental method for studying the dissipative and strength properties of polyurethane, Vestnik PNIPU․ 2 (2013) 145-153
Ferry, Viscoelastic properties of materials, Pub.

This RVE is made up of N elastic phases as elastic particulates (inclusions), Ypi, and eventually porosities of ϕ volume fraction, Yϕ, embedded in an elastic matrix of mechanical properties Cm.
The particulate group is constituted by (N-1) finite phases of identical elastic inclusion, according to their mechanical behaviors and geometrical properties.
The effective properties of the porous particulate are obtained using the two step homogenization approach [13].
The first step concerns the study of the porous epoxy matrix with respect to a given elastic properties Em=2.2 GPa and νm=0.3.
The average relative error between the iterative prediction and the experiments is around 5% which constitutes an acceptable gap with respect to the nature of the composite which can imply inevitably much unexpected factors, affecting the average properties of the composite, which often are far from the idealized model.

Introduction The stability of metal structure (figures and dimensions), is major factor which affects the precision and the reliability of apparatus mostly.
Based on the results of test before，the distributions of stresses in the layer were all set orthogonally, then only the mechanical properties in the grinding and cross directions were set.
It can be seen from Fig. 4 that the difference in state of stress between two directions affects distribution of structure deformation little.
In a word, the key control factor lies in the distribution of residual stress in grinding direction.
Owing to the poor thermal conductivity of Invar, the grinding thermal effect should impact the surface mechanical property specially, and then the problem about deformation and structural stability of Invar should be further solved in study on thermal effect of Invar's grinding.

Utilization of these parameters according to end requirement can help in achieving optimum mechanical properties on hybridized composites.
This is to know if increasing the duration could offer better mechanical properties than the ones obtained in sample code “A”.
Careful increase of the rotor speed is necessary because at higher speed, there may be a possibility of fibre breakage, which could negatively affect the mechanical properties of the composite.
However, it should be noted that higher temperature can degrade fibre and drastically reduce the mechanical properties of composite.
In conclusion, conditioning of composite has shown to improve mechanical properties.

Microstructure and properties of Mg/Al dissimilar joints by GTAW with Al-Si filler wire Hongyan Du a, Yajiang Li b and Juan Wang c key Lab of Liquid and Heredity of Materials, Ministry of Eduction, Shandong University, Jinan 250061, P.
To realize the reliable welding of magnesium alloy and aluminum alloy and give full play to the two kinds of different metal excellent properties have an important theoretical significance and practical application value.
In this paper, the microstructure and properties of the Mg/Al dissimilar metal welded-joint with filled Al-Si welding wire will be observed and analyzed.
Indications Si element is not added to improve the hardness of the main factors in fusion zone while GTAW welding, the welding wire and the base to reduce diffusion between the metal elements.
And the fusion zone of Mg side is a weak zone for mechanical performance of Joints.