材料力學(xué)考試典型題目ppt課件

1、整理課件F1F2F3l1l2l3ABCD整理課件F1F2F3l1l2l3ABCDF1FN1)(kN2001N1N1 FFF整理課件F2F1FN2F1F2F3l1l2l3ABCD)(kN1502N2N21 FFFFFFN3)(kN5003NR3N FFFD整理課件FN2 =-15kN （-）FN1 =20kN （+）FN3 =- 50kN （-）15+-2050F1F2F3l1l2l3ABCD整理課件FN2 =-15kN ( - )FN1 =20kN （+）FN3 =- 50kN ( - )F1F2F3l1l2l3ABCD)(MPa.N 8 81761761 11 1AFAB )(MPa.N 6

2、 674742 22 2AFBC )(MPa.N 5 51101103 33 3AFDC 整理課件F1F2F3l1l2l3ABCDm102.534-N 1 11 11 1EAlFlABm101.424-N 2 22 22 2EAlFlBCm101.584-N 3 33 33 3EAlFlCD-0.3mm BCCDBllumm10-0.474- CDBCABADllll整理課件D+Me2Me3Me1180)2(pepe GIaMGIaM整理課件MPa7 .69tmaxmax WT mkN292e M33. 2180)23(pepe GIaMGIaMCBBACA D+Me2Me3Me整理課件BAF

3、lx)0()()0()(SlxFxxMlxFxF 0SFA左左FFA 右右SFSxFFlxM整理課件2RRqlFFBA lqFFABx)0(222)()0(2)(2RRSlxqxqlxxqxxFxMlxqxqlqxFxFAA 整理課件)0(2)(SlxqxqlxF2SqlF 2SqlF +ql/2ql/2BlqFAxF整理課件)0(222)(2RlxqxqlxxqxxFxMA lqFABxF00 Mx，0, Mlx( )d0d2M xqlqxx2lx 822maxqlMMlx+82qll/2整理課件 lqFABxF+ql/2ql/2+82qll/282maxqlM2maxSqlF整理課件lFA

4、BCabFFlFbFA RlFaFB R整理課件 xxlFABCabFRAFRB)2()0()()1()0()(SaxxlFbxMaxlFbxF )4()()()()()3()()()(SlxaxllFaaxFxlFbxMlxalFalblFFlFbxF 整理課件)1()0()(SaxlFbxF)3()()(SlxalFaxF xxlFABCabFRAFRB+lFblFa)4()()()(lxaxllFaxM )2()0()(axxlFbxM+lFba整理課件xxlFABCabFRAFRB+lFbalFblFa整理課件R AMFlR BMFl( )() ( )S01MFxxlllABCabFR

5、AFRBM+Ml整理課件xxlABCabFRAFRBM( ) MM xxl)0(ax ( )()MMM xx Mlxll)(lxa CMaMl左左 0M CMbMl右右+MalMbl整理課件lABCabFRAFRBM+/M l+MalMbl整理課件lABxFmaxwmax 整理課件xlwABxF( )() (1)M xF lx ( ) (2)EIwM xFlFx 21 (3)2FxEIwFlxC 2312(4)26FlxFxEIwxCC 整理課件21 (3)2FxEIwFlxC 2312(4)26FlxFxEIwxCC 0,0 0,0 xwxw120 0CC22FxEIwFlx 2326Flx

6、FxEIw 整理課件BwmaxmaxxlyAF（ ）222max|22x lFlFlFlEIEIEI max maxw（ ）3max|3x lPlwwEI 整理課件max maxwABq整理課件RR2ABqlFFABqFRAFRBx2( )22qlqM xxx2346qlqEIwxxC 222qlqEIwxx 341224qlqEIwxxCxD整理課件233(64)24qlxxlEI 233(2)24qxwlxxlEI 0w xABqFRAFRB A B3max24ABqlEI wmax4max25384lxqlwwEI 整理課件ABFDab整理課件RAbFFlRBaFFlFRAFRBABFD

7、ab12xx1R(0)AbMFxFxxal2() ()bMFxF xaaxll整理課件11bFxEIwMl2112bxEIwFCl 31116b xEIwFC xDl整理課件22()bFxF xaEIwMl 2222()22bF xaxFEIwCl33222()66bF xaxFxEIwCDl整理課件12ww12ww10w 20w 120DD2212()6FbCClbl ABFDabl12FRAFRB整理課件22211()36FbwlbxlEI 22216FbxlwbxlEI2222221()()23FblxawxlblEI b 33222() ()6FblxxawxlblEI b 整理課件1

8、0()|6AxFab lblEI 2()|6Bx lFab lalEImax()6BFab lalEI 整理課件0w 10w22211()036FbwlbxlEI 221(2 )33lba abx1222 3max()0 06429 3x xFbPblw |lb.wEIlEI 整理課件222(34)0.062548CFbFblwlbEIEI1222 3max()0 06429 3x xFbFbly|lb.wEIlEI整理課件ABCD1.4m0.6m15kN10kN0.8mABFemkN15 6 . 0104 . 115e MkN25 F整理課件ABFMe+15kNm-20kNmmkN20max

9、 MmkN15 T)1(3243 DWMPa26.157223r WTM整理課件lFcr2l()2cr22EIFl Fcrl0.3l0.7l( . )2cr207EIFl Fcrl2cr2EIFl l 22cr)(lEIF lFcrl/4l/4l/2( / )2cr22EIFl l整理課件 22crlEIF 22cr)7 . 0(lEIF 22cr)5 . 0(lEIF 22cr)2(lEIF 22cr)(lEIF 整理課件scr ba cr22cr E cr Ps整理課件dF1.3 a BF1.6 aCaFA整理課件al22 al3 . 11 aal12. 16 . 17 . 07 . 0 dF1.3 a BF1.6 aCaFA整理課件30mm20mmyz1p99E m0058. 002. 003. 0)02. 003. 0(1213 AIiyy整理課件m0087. 0 AIizz15 . 0 zy 30mm20mmyz11586 zzzyyyilil kN5 .8922crcr zEAAF 整理課件FACD1.2m1.2mB30FFRAyFRAxFyxFNAB3002 . 14 . 2