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 Wysłany: Śro 1:32, 12 Sty 2011 Temat postu: moncler daunenjacke Principal shear stress of the |
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Principal shear stress of the stress Mohr circle solution
The winding shaft to 2 to 3 axis with the positive turn in the opposite, positive, corresponding to Figure 2 points in the same way I can see the surface of the principal shear stress N also corresponds to Figure 2, I point in the plane} N and N principal shear stress on the body relative to the unit around the axis with the 2 to 3 axis is shifting to the same negative, corresponding to point I in Figure 2 (Figure 4a). Further in Figure 2 can be judged Ⅱ, Ⅲ principal shear stress at the point of being the main shear plane,[link widoczny dla zalogowanych], respectively, while l, Ⅲ principal shear stress at the point were negative principal shear plane, as shown in Figure 4b,[link widoczny dla zalogowanych], c (Figure projection relation corresponding to Figure 3) shows. 4, the stress state of cylindrical main surface shear stress Stress Analysis of Figure 5N Fig. 5AnaLysis0fthestressesonNLplane the three principal stress in the two are equal, the corresponding stress state of cylindrical stress state. When o. > Oz-a,[link widoczny dla zalogowanych], the equation (1) into two equations 0 A o2) + r a 1 (ol-a2) 1 Bu】 2. (J2 『( determine the two circles O., O (see Figure 6), and a round O does not vary with 1, m, in_ change, power to obtain extreme, too small for the soil ( Thus at the point I (I) 12 Plastic Engineering shear volume 2 At this point, the radius of circle O O1O1 = (j2 + j.,. may l_ who is the main temple and a shear plane normal axis intersect 45., constitute Two angle is 90.'s conical surface, the main shear plane,[link widoczny dla zalogowanych], shear stress can be expressed in its normal vertical bus, on another cone. judged by the aforementioned method can determine the direction of principal shear stress point to apex, as shown in Figure 7a shown in the figure on the shear stress on the cone in Figure 6 corresponds to point 1, the next cone on the shear stress corresponds to a point in Figure 6 1. t ● - a , the principal shear plane normal and 3-axis intersect 4-45., also constitute the two angle for 9o.'s cone, but the principal shear stress direction deviated from the cone vertex (Fig. 7b) 5. Conclusion 1) from the stress Mohr circle can be directly determined the size of the principal shear stress and principal shear stress direction cosines of the normal plane. This method is simple, intuitive, apply. 2) from the main method of determining the direction of shear stress known: is the main shear plane shear stress is positive, relative to the body of the unit around the axis corresponding to the positive turn in the opposite; negative principal shear plane, shear stress negative, relative to the cell body around the corresponding axis is shifting to the same. This plasticity itself and its application in the engineering value and significance. 3 Lian-Dong Wang et al: principal shear stress of the stress Mohr circle method l3 References Wang Danian. Metal forming principle. Machinery Industry Press, 1986.86 ~ 59,63 ~ 64 Linhao Ping. Forging deformation force engineering calculations, Mechanical Industry Press, 1986 +14 ~ 16, Z8 ~ Z9 Wang Zutang. Metal plastic process of mechanical analysis, Tsinghua University Press. 1987,33 ~ 37AMETHoDoFTHEMoHR'SSTRESSCIRCLEABoUTTHEMAINSHEARINGSTRESSWangLiandongLniZhubai (NortheastHeavyMachineryInstitute161042/AbstractInthispaper, amethodoftheMohr'sstresscircleaboutthemainshearingstressesisproposed. AndaJuingmethodaboutthedirectionsofthemainshearingstressesisgiven.Itisofvalueandsignificanceforplasticitymechanicsanditsengineeringapplying.Keywordsmainshearingstresses.mohr 'sstresscircle.plasticitymechanics
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