GM准则解析无缺陷弯管的塑性极限载荷.PDFVIP

第32 卷第11期 东 北 大 学 学 报 ( 自 然 科 学 版 ) V o l. 32, No. 11 2 0 1 1 年 11 月 Journal of Nort heastern U n vers ty( N atural Sc ence) N o v. 2 0 1 1 GM 章顺虎, 赵德文, 高彩茹 ( , 110819) : GM ( ) , , . t r R 0 ; R 0 , R 0 , . T resca, M ses T SS , T resca , T SS , GM , M ses . : GM ; ; ; ; : T G 335 . 7 : A : 1005- 3026( 2011) 11- 1570- 04 Analysis of Plastic Collapse Load of Defec-t Free Pipe Elbow with GM Criterion ZH A N G Sh un- hu , ZH A O D e-w en , GA O Cai- ru ( State K ey Laboratory of Roll ng A utomat on , Nor theastern U n vers t y, Shenyang 110 819, Ch na. Correspond ng author : ZHA NG Shun- hu , E- ma l: zhangshunhusc @ yahoo. cn) Abstract: W t h GM ( g eomet r cal m dl ne) y eld cr ter on , t he plast c collapse load of defect-free p pe elbow under nner pressure w as analyzed and an analyt cal solut on w as obta ned . T he solut on showed that t he collapse load s a f unct on of w all t h ckness t , averag e rad u s r , y eld st rength as w ell as curvature rad us R 0 . T he collapse load ncreases w t h t he ncrease of t he curvat ure rad us R 0 and s t he same as t he burst pressure of stra g ht p pe f R 0 s assumed . T he plast c collapse load calculat ed by the solut on w as compared w t h t hose based on T resca, M ses, as w ell as T SS y eld cr ter a. T resca cr t er on pred ct s the low er bound of t he collapse load, wh le T SS cr t er on pred cts the upper bound. How ever, t he collapse load on t he GM cr t er on l es just bet ween the T SS and T resca solut ons- most notably, t he G M cr t er on almost has t he same prec s on w t h t he M ses solut on .