This paper describes how the new finite element methods are used to: calculate root fillet stress and stress distribution, root stress intensity factor, tooth deformation and contact stress.
Aimed at the parallel four-bar mechanism based on Double Crank ring-plate cycloid drive,the effects of deflection of bar-length and joint-gaps on force of linkages are analyzed according to kinetics,principles and the force analyse model is established,provides theoretical foundation in mechanism design for guaranted with reliability of intension and movement of the component.
The equation of attraction is derived. Mathematic expressions of force/displacement coefficient,force/current coefficient and the maximum bearing capacity are obtained. A set of design and calculation methods are given,such as those for gap magnetic induction intension,pole area,gas length,electromagnet iron parameters,and permanent magnet parameters,providing reference to applications.
FW thick wall pressure vessel with carrying liner does not only utilize machining property, airproof property and high intension high toughness that liner materials have, but also utilize the merits of high stiffness and intension, design property, which composite materials have.
The tensile strength of the new state T79 of 7012 aluminum alloy reaches 745MPa,the yield strength of it arrives at 684MPa,the extension ratio attains 14%.
The influence of methanol content, pH value, ion types, and ionic strength of mobile phase are studied in detail.
It was indicated that the notched impact strength and elongation at break of the polymers increased with the increase of PDMS content.
It implies that this is an effective means to reduce the dielectric constant of PI, but it also causes the decrease of tensile strength and the rise of water absorption.
The compressive strength of the composite is higher than that of the PLA scaffold.
pH, proteins, amino acids, ionic strength and Na2S, on the dissolution of cinnabar.
Let {N(t), t≥0} be the nonhomogenous Poisson process with cumulative intensity parameter Ν (t), {δt,t ? 0} the age process, and {γt,t ? 0} the residual lifetime process.
Generally, The risk-neutral default intensity λQ is not equal to the empirical or actual default intensity λ.
It can be concluded that the newly built feeding-sample system can increase the spectral line intensity by about two to three times and decrease the detection limit by about 2 to 10 times.
The results indicated that the weak election-withdrawing group 4-hydroxymethyl in 4-position of pyridine in 4-HMDPA could weaken the fluorescence intensity of the lanthanide complexes.
Each NMR spectra was data-processed to provide 238 intensity-related descriptors as input coordinates in a multidimensional space and analyzed by PR method.
The coupling intension corresponds with two factors: the structure of an SLM and the position of an object point in the view of an SLM.
In this paper, a correlation function is proposed to describe the coupling intension between the couple optical paths of an SLM.
Confocal laser scanning microscopy (CLSM) was applied to detect the intracellular [Ca2+] variety of fluorescent intension, with Fluo-3/AM fluorescence loaded in SFSMC.
In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well.
Intension annotation that improves the checking method is also discussed.
It implies that this is an effective means to reduce the dielectric constant of PI, but it also causes the decrease of tensile strength and the rise of water absorption.
However, there was only a small change in the water absorption rate and a decrease in tensile strength and compression strength were noted.
Water absorption ratio, expansion time and water absorption rate decreased, but tensile strength and compression strength improved.
The longitudinal tensile strength (MOR) ranged from 115.94 to 328.15 MPa.
We analyzed the microstructure of the welding bead and the tensile strength of the non-electric welded joints.
When we design or manufacture a cam more accurately, the ana-lytical method of calculation is desired. For example, by fabricationa cam the coordinate of pitch curve or centure of cutter must be de-termined; by calculation for strength and wear, the radius of curvatureof the pith curv sould be investigated. This problem has been solvedby different method, wich may be found in some literares. In thispaper the author suggest a way to establisb the systematic fotmulaswith parameters α and β. (α is pressure angle,...
When we design or manufacture a cam more accurately, the ana-lytical method of calculation is desired. For example, by fabricationa cam the coordinate of pitch curve or centure of cutter must be de-termined; by calculation for strength and wear, the radius of curvatureof the pith curv sould be investigated. This problem has been solvedby different method, wich may be found in some literares. In thispaper the author suggest a way to establisb the systematic fotmulaswith parameters α and β. (α is pressure angle, and β is the anglebetween radius R and normal to pith curve). For conveience to calcu-lation, several nomograms are discussed. The construction procedureof a cam is as follows: (a) Select the type of follower motion. (b)According to maximal pressure angle and nomogram 4 or 5 determinethe minimum cam size.(c) Calculate the coordinates of pitch curve byformulas(1)(2)(3)or (8)(9). If the size of roller is different from thecutter, the calculation must be continued with the formulas (6′)(7′).(d) If considering with Strength、wear or radius of roller the, radiusof curvature of the pitch curve must be calculated with formula(13).Because the method of deriving formula of the cam for oscillatingfollower or translating follower is same. so the formula for oscillatingfollower is described in detaill only.
This paper introduces the procedure of making and test of a small powe harmonic drive,and gives an analysis and discussion on the engagement,tooth form,the selection of the material of the flexible gear,its strength and the construction of the harmonic drive,etc.
强度
strength 
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