材料力学-复习ppt课件

1、dAEG)(12EG)()(sssEEAyIAxd2AxIAyd2AxyIAxydArAyxIAApd)d222 (iiciiyiyAxSSAaIIxx2AbIIyy2abAIIyxxyDxy)(441641DI441321DIpDxydhbyxyxc cbayxxMQddxQqddANpITrpWTmaxzzIyMzWMmaxmaxbISFzs k = 3/2k = 4/3k = 2k = 1AFkS max WMAFSmaxmax PLadPLadPTPLaABdPT323maxdPLWMM323maxdPLWMM163maxdPaWTPT163maxdPaWTPTEALFLS xEAFL

2、LNd0 pGITLxGITLpd0AAA)()(xvEIxM 1EIM1axPxq)(00axqxq)(0axmxM)(001daxxaxL1d10naxxaxnLn)()()()()(xvxxMxQxq)()()()()(xvxxMxQxq)()()()()(xvxxMxQxq)()()()()(xvxxMxQxq)()()()()(xvxxMxQxqDCaxm00积分常数DCaxm00积分常数DCaxm00积分常数DCaxm00积分常数DCxxxxMEIvdd1)(mEIPLEIPLvAA2323EIPLEIqLvAA6834EIPLEImLvAA22EIPLEIPLvBA164823E

3、IqLEIqLvBA24384534EImL24maxEImLEImLBA36PAqAmAPABqABmABvqRvRqLBqBsin2cos22121xyyxyx)()(cos2sin221xyyx)(yxxynyxxynyxxynyxxynyxxyyxxy2tan222221xyyxyxji)(,31max21)(zyxxE1321dddVVve1eq1)(321eq231eq3)()()(213232221eq42122eq3422eq4322eq31TMW22eq4431TMW22cr)(lEIPil22crE0221222qaqaaqRaB0AmqaRB40Bm222121qaqaR

4、aAqaRA2022qaqaAAAdxxbnd0AxSAydxxbnd01yxAddxybxndd00 111nbnbhn11xyxbxndd00 xyxbxndd00 221nbn221hbnnbh ASxycAyIAxd213) 13(31nbnbhnA11221hbnSybhnhbn11212bnn21xyybxndd002 xxnbd31303) 13(31bhnm0dd)(QQxqQxQqddMxqxQ2d21d)(xMmQdd0ddxmMM)(P2L/3L/3 L/2L/2AB2EAEAR1R221RRPEALREALN22222021PRPR323121EALNEALNAB223

5、21PRN31112211RNRNEALREALN111EAPL18PRN32222211NRNRPaaRaRmCo21cos450EAaNaEAaNao2211cos45o21cos45avaB2441PN2422PN21TT 222111ppGILTGILT212pGITL12ppIIk kTTT1211max11WkT)( 2max21WkT)( 32132141414242)()(DD71680.MPa31711164131.)()(DkTMPa72111164232.)()(DkTTTT2121maxmaxzcIMymax21100maxmaxccyy766.cy7662020809

6、020402080.bbyczcIyM)(100max791.bEIPLv4831EIPLEILPv123221332)(EIPLvvvA485321PEIPaaEIPav64416321EIFaaEIaFaEImavAA481244332)(EIFaaEIFv19243332EIFaaEIaFaEImavBA962444632)(021vvvvBAAA01929648643FFFPEIaPF73aaFa41314121aaFa41324121019276413FPEIavAPF73aaPaEIvA8141211aaFa4132414121aaCEIh baaCEIPEIPaEIaP64823

7、3)(36aEIP2max321aEIPaMWaEIWM2maxmax32223236123aEhbhabhE2mm50010101030)(AMPa6APN2710101040551010201040cy3eMPa9511max.IPeyIMyMMPa957maxmax.MN4max10591.Ea4max104770.Eb46mm1015220 .23232810101010121740104010121Ihtm21htxM21ChtxEI2411DCxhtxEIv312112410htLCL)(3610htLDLv)(3236141121LxLxEIhtxv)(23333212660Eb

8、htLbhEhtLLEIhtv)(txN EbhtLEAtLxEAtxxEANLLL22dd2200EbhtLu202)(L/ 2L/ 2PBCPBCmEIPLPB162EImLmB303162EImLEIPLmBPBBPLm1635P/ 1611P/ 165P/ 1611P/ 165PL/ 323PL/ 16BaxakxkFB2akFamBEIPLPB162BmBEIkLaEImL332BmBPBBBEIkLaEIPL31622)(EILakEIPLB311622311162sPLakmMBB2kLaEIs Pv PBRv R 1EIPaavPAPB23EIRavR331EIRaaEImaa

9、vmAR32EIRavvvRRRB34321aPaABRv R 2mPR0RBPBvv034233EIRaEIPaPR83aPaAB5Pa/ 8P3P/ 83P/ 83P/ 8NP3P/ 8Q5Pa/ 83Pa/ 8MqLLqqLQ61321MPa93163.bhqLh/ 42291321321qLLqLqLM2291321321qLLqLqLMMPa886312492232.bhqLbhhqLIMyMPa886312492232.bhqLbhhqLIMyMPa886312492232.bhqLbhhqLIMy2232244122642hhhbLqyhIQz2232244122642hhhbL

10、qyhIQzEExzyxx1EExzxyy1511051126EGxy)(434xa130yc17890sin2190cos2121oo45oxyyxyxb)()(h/ 443410434613010130609393886.T330.MPa60EIFLvAF33EIRLvMAR33avBART0Av0313323EIFLEILRaEIRL)(22131LaFR)(F54aGILRaPEILRa21)(FLLRFM51)(FaRaT5422eq47501TMW.2232212532125aLdFaLWFMPa550.330.MPa60FR5411111111LGIaEIPPGILEIa1221

11、11aPaEIF121LPaGIPLa45250.IIP2EEG5212)(EIGIP541145854LaLaPaXLa45250.Pa83)(PRA218PamA支反力偶矩方向如图。PFGIPaLEIPa242101111FX12124PPGILEIaGIPaLEIPaXPGILEIa1133aEIkNoImageEIaaaaEI332211311EIaaaaaaaEI3432211322EIaaaaEI2211312EIa3311EIa34322EIa2312EIFaFaaaEIF221131EIFaFaaaEIF321034222332313132313EIFaXEIaXEIakXEIFaXEIaXEIa0034222332313132313EIFaXEIaXEIakXEIFaXEIaXEIaFXFX231523621,EIakX23231034222332313132313EIFaXEIaXEIakXEIFaXEIaXEIa32212232221111aaaaaaEIEIa2311221322121122aaEIEIa67例 构造各部抗弯刚度均为 EI，画出如图构造的弯矩图。121221322211212