第二章 拉伸壓縮、剪切0312

1、Chapter2 2Chapter23 456 FFFF7mmFF8mmFFNmmFF9mmFFmmFFN10FNmmFFmmFFNmFm11FNmFFmmFFNmFm12xFNO13CABD600300500400E40kN55kN 25kN20kN14CABD600300500400E40kN55kN 25kN20kNCABDE40kN55kN 25kN20kNFRAkN100202555400RR AAxFFF15CABDE40kN55kN 25kN20kN10R1N AFF)()kN(10R1N AFF16 F40kNFN220kNCABDE40kN55kN 25kNF2040R2N

2、AFF)()kN(5040R2N AFF17FN320kN25kNCABDE40kN55kN 25kN20kNF30 0202025253 3 NF)()kN(53N F1820kNFN440kN55kN 25kN20kNF4)(kN)204N F195010520+CABD600300500400E40kN55kN 25kN20kN(kN)50Nmax F20FFabcd21FFabcda b c d 22 F FN23AFN 24Fkk F coscos AFAFpFkkFp AFp cosAA FF 25 2coscosp sinsin22p Fkk FFkkxn p26 Fkk FFk

3、kxn p27 max2 2 max2 2 min0 00 0 ,2coscospsinsin22p xnFkk 28Nmaxmax AFNmax FA NmaxAF AFmaxN 29FABCFF3000400037024021kNN50501 1 FFkNN1501503 32 2 FF30FABCFF300040003702402150kN150kNMPa.N/m.2N87870 0101087870 024240 024240 050000500006 61 11 11 1 AF MPa.N/m.2N1 11 110101 11 137370 037370 01500001500006

4、 62 22 22 2 AF max 31ABCF1m32ABCF1mFAxy33FAxy0 030300 01 1 FFFysinN0 00 01 12 2 cos30NNFFFxFFFF7327321 12 22 21 1.NN 22mm6 62 26 61 11010286028602 2143014301010217221722 210861086 AA34AFmaxN FFFF732. 122N1N kN.N24243693691 11 1 AF kN.N20204864862 22 2 AF kN.N6 61841842 21 11 1 FFkN.N7 72802807327321

5、 12 22 2 FF352aaFABDC362aaFABDCCDFACBFFMCDA230N /N232119MPa4CDFFAd N AFCDCD37F=33.5kN2aaFABDCCDFACB2 23 3FAFCD N N AFCDCD/N 2 23 3FFACD / 2324dF 38 3940 dl標(biāo)距標(biāo)距41FOlefhabcddgfl042 p E p fOfha43e p fOfhab es 44 s b b e p fOfhabce45 s b e p fOfhabce46 %1001001 1 lll %1001001 1 AAA 47 abcefOgfhdd48pe ab

6、cdefOdgfhd49 50dh0 03 35 51 1. dh51 sO 52nu ssn bbn 53max max 54max max Kmax 55 FFbh h1 lllll 1 156bbbbb 1 1 FFbhh1 bbb 157 AFN ll E EAlFlN 58F1F2F3l1l2l3ABCD59F1F2F3l1l2l3ABCDF1FN1)(kN2001N1N1 FFF60F2F1FN2F1F2F3l1l2l3ABCD)(kN1502N2N21 FFFFFFN3)(kN5003NR3N FFFD61FN2 =-15kN （-）FN1 =20kN （+）FN3 =- 50k

7、N （-）15+-2050F1F2F3l1l2l3ABCD62FN2 =-15kN ( - )FN1 =20kN （+）FN3 =- 50kN ( - )F1F2F3l1l2l3ABCD)(MPa.N 8 81761761 11 1AFAB )(MPa.N 6 674742 22 2AFBC )(MPa.N 5 51101103 33 3AFDC 63F1F2F3l1l2l3ABCDm102.534-N 1 11 11 1EAlFlABm101.424-N 2 22 22 2EAlFlBCm101.584-N 3 33 33 3EAlFlCD-0.3mm BCCDBllumm10-0.474-

8、 CDBCABADllll64ABC12 65ABC12 , ,FyA12 x0coscos00sinsin02N1N1N2N FFFFFFFyx cos22N1NFFF 66AABC12 ABC12 cosNEAFlEAlFll2 21 11 12 21 1 67ABC12 A A2 2A1Al 1 12AAAAA )(mm293. 1cos2cos21 EAFllAAA68F FA12x30yA1 1l 12mABCF301 12 2FFFF732. 122N1N A2 2l 2mm.mm.NN7657650 01981981 12 22 22 22 22 21 11 11 11 11 1

9、 EAlFlAAEAlFlAA693030AA1A2l 1l 2A30A1 1l 12mABCF301 12 2A2 2l 2A330cos1222llAAAAAA 30sin30tantan3012232llAAAA mm.)()(78783 32 23 32 22 22 23 3 AAAAAA707172 CABDF 1 12 23 3xyFA 2 21 10 0NNFFFx 0coscos03N2N1N FFFFFy 73CABDF 1 12 23 3xyFA CABD 1 12 23 3743 3l A1 12 23 3 CABDF 1 12 23 3CABD 1 12 23 31 1

10、l cos3 31 1ll 1 11 11 11 1EAlFlN 3 33 33 33 3AElFl cosN 2 23 33 33 31 1cosNNAEEAFF 75CABDF 1 12 23 33 3l A1 12 23 3 1 1l 2 23 33 32 21 12 21 1coscosNNAEAEFFF 2 21 1NNFF 0 03 32 21 1 FFFFNNNcoscos 2 23 33 33 31 1cosNNAEEAFF 2 23 33 33 32 21 1cosNAEEAFF 76ABCF3aal2177ABCF3aal21FABC3aa21FN1FN2FN3F 0 xF

11、0 xF 0 0yF03N2N1N FFFF 0 0BM0 02 22 21 1 aFaFNN78ABCF3aal21ABCl 3l 2l 1ABC3212 23 31 12 2 lll 1 11 11 11 1EAlFlN EAlFl3 33 3N EAlFl2 22 2N 2 23 31 12 2NNNFFF 79ABCF3aal21ABCl 3l 2l 1ABC321N2N3N1FFF2 2 0 0 xF0 0 FFFFN3N2N102N2N1 aFaF6/53/6/N3N2N1FFFFFF 80 AABCD 2 21 13 3l81 AABCD 2 21 13 3ll 3l 13 3l

12、1l3l 1cosl cos1 13 3ll3 33 33 31 11 11 1AElFlAElFlN3N1cos 82 AABCD 2 21 13 3ll 3 l 1 2 21 11 13 33 3cosN1N3AElFAElF0coscos0sinsinN2N1N3N2N1 FFFFF 83 ABC12aaB1A1C1l3C1C84l3C1CABC12B1C1A1ell 3 31 185aaxEAlFl1 11 1N1 3 33 33 3AElFlN3 AElFeAElFN1N3 3 33 3CAB0 0 N2N1N3FFFN2N1FF 86AB87 ABABB0 0 lAB88ABAB0 0 FTlllEAlFlBFR lTllT EAlFlTBlR TEAFlBR TEAFlBTR BAB89 （FFFFFF90mFFAB d 1 1 191nnFF 92nnFF93mmF剪切面剪切面FS FFmm00S FFFxFF SAFS 94mmF剪切面剪切面FFmm AFSnu u 95FFFF96FF bsbsbs AFAFbsbs 97 hbsAdh98 bsbs FA bsbs