Search results

The residual stress that occurs in fiber-reinforced thermosetting composite materials during cure is one of the severe factors that can deteriorate the performance of composite structures.
Since thermosetting composite materials, which are softened at the beginning of cure, undergo hardening as the cure process goes on, the mechanical properties of the thermosetting composite materials are generally changed during the manufacturing process.
mτ and mW are relaxation times and weighting factors at the given degree of cure.
The relaxation times ( )mrτ α corresponding to rα and the weighting factors mW are presented in references [12, 16].
Since the composite hardens as the cure process goes on, the mechanical properties of the composite are changed.

With the development of the pipeline network, advanced mechanical properties become more and more requisite.
So, grain-refinement becomes the most favorable way to promote the mechanical properties of materials.
Thus, it is expected that the application of ECP could improve the mechanical properties of pipeline steels by refining the grains.
Fig. 3 plots the mechanical properties of the samples.
Xiao et. al studied the drive force for dislocation motion during ECP, they suggested that four main factors may affect the dislocation motion under ECP: thermal compressive stress, pinch effect, electron-wind force and temperature effect[14].

Studied the mechanical properties of composite material.
The mechanical properties for two groups were found as shown in Table 2.
Table 2 Mechanical properties for two groups.
Table 3 Mechanical Properties That Determined from Stress -Deflection Curves.
Fig.10. and Fig.11. show the safety factors for each type of composite material.

Various factors on gypsum block were investigated.
The prepared gypsum block possesses excellent water-resistance, good operating property and high mechanical strength.
The physical and mechanical properties of calcined gypsum were shown in Table 1.
Table 1 The physical and mechanical properties of calcined gypsum Setting time 2h bending strength, MPa 2h compressive strength, MPa Softening coefficient Water absorption rate, % Initial setting time, min.
The main factors to affect the water resistance of gypsum block were the water resistance agent KD-3, foam and curing regime etc.

Finishing clearance is one main parameter affecting finishing effect and efficiency of magnetic abrasive finishing.
Affecting rules of finishing clearance and filling volume are discussed by experiments, which provide basis for parameters selection and practical application of magnetic abrasive finishing.
Introduction Surface quality is an important index for evaluating part quality, and has great influence on the properties, life and reliability of part, especially on those of the part working under high speed, high temperature and high pressure.
Consequently, it has effects of surface finishing, increasing surface quality and improving the physical-mechanical properties [1-6]. 1-magnetic abrasive 2-workpiece 3- magnetic formation component Fig.1 Principle sketch of magnetic abrasive finishing for rotary outer surface In magnetic abrasive finishing, finishing clearance is one main parameter affecting finishing effect and efficiency.
This paper discusses their affecting rule by experiments, which provide basis for parameters selection and practical application of magnetic abrasive finishing.

However polyamide 6 is highly hygroscopic and the mechanical properties of materials are reported to be degraded by water absorption.
However polyamide 6 is highly hygroscopic and the mechanical properties of materials are reported to be degraded by water absorption[2].
As an application of CFRTP becomes more extensive in the future, the usage environment also becomes diversified and it can be considered to be affected by various environmental factors.
In addition, when exposed to high temperature environments, it is wellknown that water absorption properties of FRP are affected by the damages such as cracks, and dissolution of resins[5].
Enoki: Effect of Water Absorption on the Mechanical Properties of Carbon Fiber/Polyamide composites, Journal of Solid Mechanics and Materials Engineering, Vol. 7, No.5 (2013), p. 520-529

Cement characteristics, namely rheological and flow properties, greatly affect implant success.
In contrast to the relatively large amount of work on mechanical properties of bone cements, few data have been published oh their rheological properties.
The rheological properties of the cement directly affect the ease with which cement flows and penetrates the bone microinterstices and consequently the positioning of the prosthesis in the bone bed during the short time available before the cement hardens.
These properties need to be taken into consideration when examining cement flow [2, 3].
Nevertheless, in contrast to the relatively large amount of work on mechanical properties of bone cements, few data have been published oh their rheological properties [4].

Introduction Metal foams are a relatively new class of materials with cellular structure, namely a solid metal, frequently aluminium, depleted by a large volume fraction of pores; the density of the media affects the overall mechanical properties, thus can be adopted as an additional variable for functionally grading the material resource within a structural element.
Parametric Analysis A parametric analysis is carried out varying some geometrical and mechanical properties of a sandwich beam in order to assess the behavior under pure bending and the potential improvements in mechanical performances.
The mechanical properties of the sandwich beam are summarized in Tab.1.
The curves A-E refer to the different aluminum foams herein considered, whose mechanical properties are summarized in Table.1.
Ashby, Cellular Solids, Structure and Properties, second ed., Cambridge University Press, 1999, 345-386

The dipole shape factor dl relates closely not only to the properties of interstitial atoms but also to the alloys properties such as lattice constant and elastic modulus [5].
The dipole shape factors dl of Ti-Nb-O alloys were deduced from the experimental data as 0.406 for the randomly orientated polycrystalline Ti-25Nb-(0.16-3.1)O alloys [4] and as 0.42 for the highly textured Ti–25.2Nb–0.6O alloy [3].
This suggests that other key parameters in addition to the lattice constant also affect dl greatly.
(1) The dipole shape factors (dl) of the oxygen Snoek-type relaxation were figured out for the Ti-Nb-X (X = Al, Sn, Cr, Mn, Fe) ternary alloys.
(2) The dipole shape factor was affected by the lattice constant of the alloy and the e/a.

The effect of hot rolling and hot forging with different reduction ratios on the hardness and impact toughness properties will be studied.
An understanding of the combined effect of TMT and heat treatment on the hardness and impact toughness of the low alloy steels would help in selecting conditions required to achieve optimum mechanical properties and alloy high strength to weight ratio.
Introduction Hot work provides the driving force for microstructural change and improves physical and mechanical properties.
Tempering reduces brittleness imparted by hardening and produces definite physical properties within the steel.
Effect of vanadium and titanium modifi- cation on the microstructure and mechanical properties of microalloyed HSLA steel.