sPJlJ where Lu = cluster cloud -based curse -sljS one kind of differential-type full amount of elastic-plastic finite element method and its application theory,hollister, X direction strain component values ​​and the y-direction strain component values ​​are numerically equal,abercrombie, but the difference between a symbol,hollister. Stress-strain constitutive for the: {+ _1-P. olJL001. sPJlJ where Lu = cluster cloud-based curse-sljS: e ∞ i: turn to for the plane strain when the equivalent stress and equivalent strain. Still used to strengthen the power law constitutive relationship: + EJ (,hollister ireland; a Ej) (2) to introduce the following notation: a (k - 1 a Xili '-E]] = 2-E22 = 2 a' E33 = 1,abercrombie amsterdam.57C a D1 +2 Lu D: 1 a Da1-sp of (I)-type differential, so you can get contact stress increment and strain increment of the tangent elastic-plastic matrix: Eda3 a [D] [dE] (3) tangent elastic-plastic moment for the symmetric matrix, the elements of the specific expression as follows: D] 1-C1 (DI + EiIT]) D] 2-C] (D2 + E1IE22T]) the main 3-C1E1IE33T] D] D-C (D + ElT) D23 a C1E22E33T] D33-C] (D3 + ET1) Third, the plane strain compression of high aspect ratio of the critical buckling analysis in machining, and due to processing errors, will produce billets in the vertical direction of the deviation, as shown in Figure 1 shows, such as aspect ratio increases, the compression will lead to instability. to study the processing of the impact of errors on the compressed instability, determine the cause of instability of the high aspect ratio critical value, the use of pure lead material as test material, respectively. different aspect ratio of the specimen under pressure 2o,hollister, △ L as measured under the pressure and pressure changes in the amount of dead volume with changes in the relationship under pressure. call compression specimen in Figure 1 will test building lq unfortunately divided into sections for the material processing 22.5 × 1.5 and the cross-section of 30 × l5 two specimens, each 5, the deviation error along the vertical lines are 1, the test will end up and down the polished specimen, the specimen on the following with a polished steel block for padding, and between them make graphite lubricant on the specimen to eliminate the pressure below the level when the next contact with friction,Abercrombie nederland, the vertical length of the specimen is taken as 50mm, can be considered under the specimen When pressure in the plane strain state test equipment and instruments used for the 100kN press, displacement sensors, Y6D2 dynamic resistance strain gauge, XY recorder preparation of 8-node plane strain isoparametric elements, the specimen is divided into 25 units, we calculate the high aspect ratio of 1 and 2 under the two sets of specimens with the increase in the amount of pressure,hollister scs, under pressure load and vertical variation of the deviation in the calculation of each step is completed, the coordinates automatically updated,abercrombie, and the experimental results and several other algorithms The results are compared in Figure 2 and Figure 3 we can see,hollister scs, this algorithm is based on the theory of the whole amount is consistent with the experimental results shown in Figure 2 for the high than we have h / w = 1,8 when compared with the experimental results of under the pressure ratio / 3 aspect ratio = 2 the calculation results and experimental comparison of four, the conclusion (1) This paper derived the coordinates of the updated plane strain differential-type full-volume finite element method, and thus the stress is true stress and strain for the logarithmic strain, biased processing to simulate the compression of metal billets instability process, the results show that this algorithm is simulated and experimental results are very close, and the ratio of the incremental elastic-plastic model and the results of rigid-plastic model is better,hollister. ( 2) This article assumes that for the smooth mold and workpiece contact points with the above algorithm can also fold the friction between the mold and the workpiece case. References 1 Li Yong Hao. elasto-plastic finite element comparisons of some solution of solid mechanics, 1982 ( 4): 565 - 5702 Joe Wall, etc. screw the whole amount of elastic finite element method of building their applications, Beijing Institute of Iron actinides, 1985 (by) r1O4 ~ 1133 Weizu Jian, etc. non-linear elastic and elastic-plastic finite element analysis of the whole volume of consistent tangent modulus. Journal of Applied Mechanics, 1992 (10) c70 ~ 764JCSimo.AfzameworkforfinkestraineIastoPIast 68I1 ~ 3151 Topics related articles:        相关的主题文章： flowers 69-82. E103BoltPJ Zhong-Ren Wang

112MN clutch state of screw press vibration isolation test analysis see Figure 6) is also formed by the 3 curves. These three waveforms corresponding to the press as the start of combat and return the braking process. Basis against which the vertical vibration of the workpiece when the maximum. The vibration of the slider starts stirred slightly smaller, return the slider vibration when braking very aroused. The basis of inertia and torsional vibration of the block were measured waveform shown in Figure 7 and Figure 8 are formed by only two vibration curves, these two curves corresponding to the slider and hit the start process. This shows that the slide return during braking, and fixed their screw on the clutch disc inertia resulting small. Enough to cause torsional vibration. It can be seen from Figure 7, the slider starts stirred inertia block level torsional vibration displacement and stirred against the workpiece when the ratio of torsional displacement of roughly 1:7. This ratio will vary slightly with the striking force changes,hollister scs. Cold play, the reverse displacement ratio of roughly l: 6.5. This is because,hollister ireland, when the cold hit the flywheel spin-down energy is released only for the elastic deformation of body movement and to overcome friction and vice friction clutch disengaged when consumed, and thus a smaller flywheel downhill, but also with the torsional vibration stirred the decrease. From the calculated data and its comparison with the measured data can be seen: (1) Figure 9 shows the vertical inertia block for the body than simple superposition of elastic vibration caused by the stretching vibration of the number of freshman class, which Figure 4 and Figure 5, as reflected in the measured curve almost see the high-frequency stretching vibration of body components in line, indicating the isolation block of vertical vibration press inertia inertial force to slide the whole vertical vibration aroused by the main machine stretching vibration of the body can be ignored. (2) superimposed vibration curve in Figure 9 and Figure 4 Figure 5 against the corresponding phase curves are almost the same measured vibration waveform, although the calculated value of about 50 side. But still shows [1] provides computational theory is the correct reflection of the screw press of the vibration mechanism. (3) Figure 11 shows the conversion to the screw axis of 5500mm from the inertia of the block to reverse the displacement at the waveform and the corresponding waveform in Figure 7 is basically the same, but the calculated value is too large. (4) as shown in Figure 10 and Figure 12 the basis of vertical vibration and torsional vibration waveform in Figure 6 and Figure 8 and the corresponding value on the waveform, although there are some differences, but the difference was not significant. Given the many factors affecting the underlying vibration and damping, the mechanical properties of the soil, calculated with the empirical correction factor such as the accuracy is not high, resulting in calculated and measured values ​​there are some errors are inevitable. So that the results reflect the actual situation of foundation vibration,hollister. Third, the conclusion (1) clutch screw press start in the slide down against the workpiece and the return will provoke vertical brake vibration and torsional vibration. Against which the vibration caused when a large workpiece, slide down the vibration of the smaller start-stirred, and stirred the slider return vertical vibration when braking very small. (2) body shells r Sui stretching vibration of the vertical displacement of the inertia block has little effect, may be ignored. (3) fight during the slide movement of the inertia force and moment of inertia flywheel and screw inertia block based on the vibration performance incentives are impulse and impulse moment,hollister scs. Impulse is equal to the size of the slider during the change of momentum against the amount equal to the size of impulse moments during the flywheel and screw against the amount of angular momentum changes and. (4) against the inertia block and aroused by the vibration of the basis of a more accurate according to the literature E1] to provide the method. (5) During the fight, based on the vibration intensity changes between the 65dB ~ 67dB,hollister, almost nothing to do with combat conditions (see Table 2). References l Yang Xuechun tuner screw press from the study. Nanchang University, Ph.D. thesis, 2000.2 of the PRC national standard dynamic machine foundation design specifications (GBS004096). Beijing: China Planning Press, 1996. g21 century China Forging LO months in 2001 in China by the Beijing Cultural Exchange Center published. Illustrated in the form of the book to show our forging line wind fruit, widely used in China's forging industry, production, sales, service, management and development of large-scale trade books,hollister. This hardcover book is great l6 t open,Hollister wien, pricing 180,abercrombie amsterdam. Published home and abroad. We need 10 plus postage, please mail order may be a bank or post office to send money from the bank shall: post office to send money,abercrombie; payee barrier,abercrombie, said: Chinese Mechanical Engineering Society Forging Institute Address: l8 Xueqing Road, Beijing Zip Code: 100 083 Bank Name: Commercial Bank Beijing Branch School Road (75000) Phone Fax :010 --52,hollister,920,654 payee: Zhang Qiansheng account guide: 0l0903391001201110l38-04 Institute of Chinese Mechanical Engineering Society of forging 45 Topics related articles:        相关的主题文章： a call m] s Shaped part forming process and die design Topics related articles