REG NACA-TN-868-1942 The influence of impact velocity on the tensile characteristics of some aircraft metals and alloys.pdf

1、sU4mmmi=WJqututu-lmn-i “-1 .k.+4-T-TECHNICALNOTESf-+,f“.-,%blgre”aterthanthe:Increaseof elong,atlon.,Underh.e-”.conditionsof thbsetests, copp$rdoes notseem “tobevbloci,ty-sensiti.ve.“.,.,. .“. .,., :.b.,E.r.ass. T.h.echfige“of“ten-iie,prgpe”rties ofbrsswith velocityseemsto“followthesametendancyfound

2、“withcopper;however,.+hein,cr.e.qs.eof.one”rgyab-sorbedbythealloy is grea”terthag the-increaseshownbpurercopper; . .“ characteristicsseem to var In ahQutQo”e,wayas withptirt3co#per;that i6,:,$ncresoof.ltiWa-ep$rength, ro-ductlonof area,elongationand Anergy”with”iricroasing ve-locity. At first,the in

3、fluenceof velocitySeemsto %esomowhatgl?etiterip the silicon-bron?pthan in pure copper,althoughthis.tendencyis roducedathighervo:locitios.-.,.3.”Steels. “ “” “,. a. SAE 1112 free-cuttingstool.cold-draw% Theyield stresso:fthis mtq.rialincreaq8s,from90,000to130;000ptiundsper squareinchwith rise In rate

4、 of deforma-tion from staticto 20 feet.per,secorid.The,energyrtiqulredto rupturerises from 26.to45 foot-poundsin the same”range.In this.materialthe yie,ldstresswas alw6,yehigherthan theultimatestrengthexcepti.fithe statjictest. d,.b. SAE 1020.hot-ro,lL,ed“steej.-The most effectiveinflu6nce”ofvelocit

5、yon the propertieso.fthis steeZoc- icurs ia the ultimatestrengthwhich ih.qeasesfromabbut65,000to about80,000poundsper sqtireinch.”The reduc-tion of Arearemainsapproxiate.ly:constantthroughoutthevoloci%yrangewhilethe+pe”rce”rik:olonga,tdnis decreasedslightly. Here, again,is a relativelyductilemntoria

6、l xsProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-b+ I?AOATechnicalMote No, 868 15.,.9and ft istebe noted that the yieldy6int in te low-P610Cityrangeincreasesvery markedy- .“ “. . .,.c. SAE 1035 steelfully annealed.-hissteelshowsa markedincrease”of

7、 yield stressfrom 4iiOOOto92,000poundsper squareinch. The ultimate strerigthin-creasesfrom 75,000to 100,000poundsper squareinch. .-The energyrisesfrom”49to 62 foot-pounds. These.in-creasesoccurwithina changein rate of deformationfromstaticto 20 feetper second. At higlter”rates“ofdefor-mation,theyiel

8、d stressrises to 125,000poundsper square inchat 140 feetpe”rsecond,while the ultimatestrengthrisesto a maximumof 115,000pounds-persquareinch at 90feetper secondand then .Unscertain.conditiong,mtixirnuns-”in”the2,400!5,300n,400!7,900NACA TechnicalNote No. 858TABLE IV - ALUMINUMUltimate(lb/sqin.)20,00

9、020,00021,50020,50022,40020,70023,40022,goo2g,20026,50023,20020,60022,goo23,gO022,10020,00025,60020,700Brealklh/sqin.)10,ooo7,0001,()()(110,30011,2009,70010,50011,400n,50015,100lg,ooo15,40017,00016,00015,20013,30014,00011,600015.- 1515.154545%/30* gogo120v 1201201501501504,%;:%57,Om67,500TReduc-Ener

10、gy tionofarea(ftTlb)$7.175.g610.210.4g.g11.p-l11.711.010.311.39.613.111.9I.I -ml!n.gg3,2131m5g204g2.g6.4L .239.246.74-J.:L62g.g30.42G.523 ,Y m12 DN11 DN10 DNzlDNlDN13 m17 m16 DN1311121617 .181920a2223242625 *IN”27 m2g DN29 DN“P Averageness - 59R*DN= doubleneck.Provided by IHSNot for ResaleNo reprodu

11、ction or networking permitted without license from IHS-,-,-. NAGA TechnicalNote Ho. 868 24 J-24S-T ALUMINUMALLOYVelocity Yield Ultinate Break,(ftfsec)(lhfsqtn.) (lb/sqin.) (lbfsqin.)IStatic 46,000 65,600 64,00010 56,000 73s000 63,00037 67,100 77, 65,40064 75,000 a,?300 70,000gg 71,300 76,200 63,o117

12、 79,600 78,000 61,wlW g4,goo 7g,ow 61,500LEnergy(ft-lb)32.046.040.446.946.6Reduc-tionofaea$33.032,740.636a4).041.541.0Elon-gation$.“20.020.222.3 “23.522.02La25.0Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N.ACATechnialNote No. 868TABLEVII - DOWME

13、TAIIJ, MAGNESIUMALLOY253qleduc-tionofareaI$27.g379537*539.13%436.939.140.139.139.19.1?039:39.1E:ClOnga-tion$5pec-ircenulm-2erCnergy:ft-lb;* velocity Yieldlb/sqin.)30*000jg,gooL9,800,70042,30047,10051,60053,20046,mo58,00062,00069,MO73,20061,70070,30050,000Ultimate(lb/sqin.)Break(lb/sqin.)(ft/see)M2$5

14、67.;10 *DH11 D.N12 DNI-3 DN15 DN16 DN17 DN44,500y,Efoo9,E$ooio,70040,100Zg,goo43,00046,!300i9,500Ji:x9,ooi1,000$2,300lQooW,loo41,00032,10029,30032,50030,60030,600y3,20036,9002g,70032,goo32,20029,goo33,40029,60037,20033370016.715.516.917.41s.217.314.7Ig.116.324.6m.1lg.1s,9lge520.620.315.716.316.716.!

15、317.417.019*319.619.0E1.g20.t322.722.519.122.422*1o101 103030305050z7575100100120120.* Averagehardness-55RTABLEVIII-noln.muX,:3L4GMSIUMALIOYT29.k 14*27.7 14.229.5 1.12g*7 z1 .515.3%: 16.239.1 17.439.2 19030 z1,5002,300U2,6005,000g,40051,60046,700kl,oo46,10042,700z ,000,5009IL212.9-19.3M.g23.4-20.119

16、.525.322.322.7.201234561515M,%353560 41;700Q2,40UQI,500-43,20045,30045,20050,moy,goo45,2004g,4uoo,gooz3,6006060“ ;:9090, 220120. 120y3.429.641.w. 2M3.!318.722.223.521.3Z!l.o20.323.419.720,1910 m11 m12 m?.09:3g.640.g37.640.g 15 DN16 m150150% 150 17 R?T1$ m-40.$ -lg.9rdnevs5/3R-gAverage1*. = doubleneo

17、kProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. Telocit(ft/secl.b.0001010102020;:gEo50$;:7070gogog9090100100100120120120150150ILACATechnicalNote No. 868TABLE IX - DOWMETALM, MAGNESIUMALLOYYield:Ib/sqin.)31,/30031,gooi3,goo7,40046,500.44,900kg,6004

18、6,20053,200“43,000Zt?,Em-.-57s959,20041,70042,300$X0;kl:mo49,600$s:23:600,100g,oooL ,30032,100?41,200,200.-55,Ultimate(lh/sqill.)35,50033,0004,5007,4m46,50044,90049,60046,20055,60044,200so64:000599555,00050,90051,20045,50057s90059,20041,70042,30046,goo44,20041,10049,600.49,30044,10050,00054,10043,00

19、0W;:“5i:555.3Q4.7gz.$3.72z:%5.145.444.236.596.6559336.957*996.33g.;5:q79W6.997.005.ogg.g3Leduc-tionofarea5:26.9599.tf5.0g.g9=76.97a96.96.96.05.0-g.g$.gg.$9*79m7;.;$:gg.gt3.7516.916.42.64.2.94.7L7;:;-2a7153:;2:3*95.66.1;:4.79zb,9Q.73.Q.Mmoi:5.$6.16.97.g4.5b.u5.05.626pec-Qauum-er3s39401232“7;10n1211z1

20、516U31920a22232k2526272 -29303132333b3537Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-LNA.CATechnicalNote No. 868 27.TABLEX - COPPERUltimate(lb/sqin.:Breakhb/sqiEnergy(ft-lb:Reduc-tionofarea$Spec-imen?nuIl-ImrElonga-tion$a71 Vclocit(ft/see)Yield(l

21、b/sqin.)h6,00050,60025,4007,70055,4052,200kg,00064,go062,70054,Soo67,20071,30069,70070,70061,goo68,7006g,loo6s,oo73950019120151515;46,00050,60056,60054,400y?,ooo50,900Sk,40051,20052,20054,700,ooy3,50052,20053,aoo,u-oo52,50052,goo54,10054,40024,70031,20038,50038,20037,90032,20033,10032,50032,20035,30

22、04s,0002395001,10043,90045,20047,1009,goo27,40049,30017.327.62.5213.429.23c).2g.t?30.230.032.223.32.123.524.124.224.626.825.g26.156.s62.861.561.63.?E:.;6a:616.222.220.020.322.02%.223.027.227.326.723.9-22.121.821.5i?l.g21*b21.221.02563560 7;101112$0;:9090120120. 120 1314151617M150i 150150Averagehardn

23、ess79Ry “QABLEm -MAEm.?ERYmuss .a.;: O:-6b,00064,00001;15153535i%743.042.354.563.462.g55,00055,00054,10044,900 27.726.0Q9.337.439.244.g47.246.044.544.150.1qo.150.454.652.541.54s.5-.-17.416.425.423.447JO04g,00048,7002Q*o27.027.527.527.956.456.555*S57.t?56.554.565.g56.9g.b60.251,gCm60,S0057,00060,go50

24、,00049,700so,0005,200%$%$. 6060. ;:90120120120150 I150Average27.12g.6 910 *Dii31.330.731.234.8u DN12 DN13 m15 DN57.!358.459.55s.32i3.730.228.726.817 DN20 Ix?18 DH19 m/- - -.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- Velocity(ft/see)o252525;:501

25、00100100150150150Yield(lb/sqin.):, a3:00092,00076,500.70,70079,ogg,100:.;77:477.277.47g.2-79*3Elonga-tionSpec-hllmnum-%er$1IFTr;:.;31:331.732.336.340.Q3312-26.456.*DNmINDNm10 DN11 DN12” “12,FREE-CUl?TINGSTI?ELCOLDDRAWNg4,300 26.3 37.t?10*5gs,ooo y.i 40.6 16.0gl,500d 48.1 15.2g6,500 :5 Q7.5 15.290,00

26、0 53.0 52.4 lg.275$o 36.3 g.: ;$.;91,000 47.1110,000 ?.27.0 47:5 11:2llh,000 .8 44.0 13.0I I I I I I .9,Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-J_.* IlkCA.TechnicalNote Ho. 868TABLEXIV . SAE1020HOT-ROLLEDSTEEL(ft/see)o015151515;35606060:904 1

27、20120150150150Yield(lb/sq,in.)3,5003,500102,aoo75,40073,000p#,500$s:;97:00064,00092,200g2,50075,goo93,200/30,100g8,50093,900126,300121,200117,000Ultimate Break(lb/sqin.) (lb/sqin.)67,ow60,00095,100ao,800gl,20071,90076,10077s900g8,60065,30079,772,9007,40079,00076,10076,30081,500q ,200q ,20077,6.0047,

28、50047,500-.-z2,0003,60048,400g,;:43:60048,20051,30033,00056,60055,20064,00070,400gl,50069,4006g,t3001Energy(ft-lb)50.252.2-7%265.6443.656.467.541*457.653.4;:.:67:560.363.7go.65g.t357*7Leduc-tionoferea$65.265.264.766.364.165./364.6:4.;?a:65:665.7;.;65:266.966.366.7*DN= doubleneckTABLEXV - SA31035STEE

29、ZFullyAnnealedStatic 47,700.10 g7,500*39 g2,80047 105,50057 102,300B 67 107,500e% 1M3,000120 I120;000130 125;000140 El,00076,50095950099,000108,00L105,0210,Ocxl11,000112,000107,00097,00063,600 kg.o69,500 59.96g,000 62.17Jj,80072.07E+,000 62.270,000 60.2,;J:g ;.;57;000 79:155,000 75.gI51.052.5!539753

30、*753.7g*55:756.556.7IGlonga-S-pec-tion imOIln7m-1ior$135.033.h37.2399734.736.131.331.6$.;.35.430.2jj.gg.;30:230.g36.925.229.219o1231549101112*DiJmInm?mmIiMINmmDi?mDXQND?m26.526.026.528.027.025.026.927.530.532.0.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-