diseño terminado
DESCRIPTION
zkdfksjfksTRANSCRIPT
UNIVERSIDAD PERUANA UNIONFACULTAD DE INGENIERIA Y ARQUITECTURAESCUELA DE INGENIERA CIVIL
DETERMINACION DE PROPIEDADES DE ACERO A PARTIR DE LA CURVA ESFUERZO - DEFORMACIONTrabajo encargado en cumplimiento parcial del curso de Diseo en Acero y Madera
DOCENTE:Ing. Wilson Paredes Gmez.
Alumno:.Elvis Jhordy Mamani Uscamayta
Juliaca, 14 de septiembre del 20151. Se tiene datos de un ensayo en traccin de una varilla de 5/8" de calidad ASTM A615 Grado 60. Los datos locales, estn referidos a una longitud de 50 mm y los datos globales estn referidos a una longitud 200 mm. Se pide:
Determinar el esfuerzo de fluencia y la deformacin de fluencia. Determinar el mdulo de elasticidad. Determinar el esfuerzo ltimo. Determinar el porcentaje de elongacin o ductilidad por elongacin. Determinar el mdulo de resiliencia. Determinar el mdulo de tenacidad.
rea de una varilla de 5/8" = Av =
1.98Cm2
1.98E-04M2
Longitud inicial para datos locales = L= Longitud Inicial para datos globales = L =
50.00Mm
200.00Mm
Ahora tenemos la tabla de datos ya completos para graficar:
LVDTLVDTCargaDeform.Deform.Esfuerzo
GlobalLocalKNL/L, GlobalL/L, Local = Carga/Av
mmmm(Fuerza)(Adim.)(Adim.)MPa
0.0000000.4412870.4748470.5023170.5419870.5786070.6060770.6487970.7006770.7525570.7952870.8288570.8837870.9478771.1004671.2347371.3751171.5185571.6619871.7932071.9091772.0373472.1533172.2357172.3303172.3944072.4706972.5225772.5927672.6415970.0000000.0016480.0028680.0028680.0019530.0025630.0034790.0034790.0043940.0047000.0050050.0053100.0050050.0050050.0053100.0083620.0089720.0104980.0114130.0129390.0156860.0166010.0166010.0190430.0193480.0220950.0205690.0227050.0227050.0220950.0000001.6595541.8182342.0013342.1478342.3614542.5018342.6361142.8680343.1976343.3563343.5760543.8507144.1986144.9920745.9442146.8902547.7203348.5992349.78943410.55237411.54113412.43835413.31115414.01305414.75769415.17273415.88683516.13097416.6192540.0000000.0022060.0023740.0025120.0027100.0028930.0030300.0032440.0035030.0037630.0039760.0041440.0044190.0047390.0055020.0061740.0068760.0075930.0083100.0089660.0095460.0101870.0107670.0111790.0116520.0119720.0123530.0126130.0129640.0132080.0000000.0000330.0000570.0000570.0000390.0000510.0000700.0000700.0000880.0000940.0001000.0001060.0001000.0001000.0001060.0001670.0001790.0002100.0002280.0002590.0003140.0003320.0003320.0003810.0003870.0004420.0004110.0004540.0004540.0004420.008.389.1910.1110.8511.9312.6413.3214.4916.1616.9618.0719.4521.2125.2230.0334.8139.0043.4549.4653.3158.3162.8467.2570.8074.5676.6680.2681.5083.96
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19.52392619.72838719.92675720.10680720.28991820.51879720.69579720.85754720.97961721.11693721.26647821.44652721.45263721.45873621.49230821.48620721.47399721.48009621.47704721.48009621.48315721.48620721.48009621.48925621.48620721.59911721.61437821.61437821.62353821.62658821.63268621.63268621.62658821.62963721.63573821.62047721.62963721.72423721.88293821.99279622.09350622.20031822.35900722.53295722.71911722.91137823.09753723.28368723.43932723.58886823.73229823.87878724.00695624.1381771.4616091.4915161.5168461.5424801.5720821.6038211.6297611.6538691.6706541.6926271.7164301.7387081.7426761.743286124.389029125.206910125.255738126.000377126.848756127.184459127.440797127.819215128.203736128.472291129.284058128.344117127.355357126.867076123.882457123.864137123.851930123.827515123.815318123.815318123.796998123.809214123.784791123.766471123.784791128.881236128.045054127.642213127.385875127.208854127.037974126.976930126.873170126.812135126.683951126.592418126.513053130.199595130.639029130.486451131.212769131.463014131.896354132.213755132.738658132.994996133.684693133.837272134.191295134.246217134.472056134.710074135.271617135.3936780.0976200.0986420.0996340.1005340.1014500.1025940.1034790.1042880.1048980.1055850.1063320.1072330.1072630.1072940.1074620.1074310.1073700.1074000.1073850.1074000.1074160.1074310.1074000.1074460.1074310.1079960.1080720.1080720.1081180.1081330.1081630.1081630.1081330.1081480.1081790.1081020.1081480.1086210.1094150.1099640.1104680.1110020.1117950.1126650.1135960.1145570.1154880.1164180.1171970.1179440.1186610.1193940.1200350.1206910.0292320.0298300.0303370.0308500.0314420.0320760.0325950.0330770.0334130.0338530.0343290.0347740.0348540.034866628.44632.57632.82636.58640.87642.56643.86645.77647.71649.07653.17648.42643.43640.96625.88625.79625.73625.60625.54625.54625.45625.51625.39625.30625.39651.14646.91644.88643.58642.69641.82641.52640.99640.68640.04639.57639.17657.80660.02659.25662.92664.18666.37667.97670.63671.92675.41676.18677.96678.24679.38680.59683.42684.04
24.26025724.38842624.53185624.66003724.76073824.84313824.93468625.04150725.16662725.30089725.45348725.57860725.73730825.86547725.98449826.08214726.18896826.28356826.39037726.48803826.57348726.68334826.77184626.86950726.93664627.01293827.06786727.15636827.26623627.38219827.49816727.61718827.74230827.83996627.94067728.02611728.09630728.19396828.27636828.35876828.42589728.51745728.58459828.68224728.72802828.78600728.82567728.90197828.98131729.06066729.14916829.24071629.34753729.432977135.387574135.875855135.820914136.193238136.058951136.290894136.419078136.931754136.950074137.413932137.670298137.804576138.067017138.018189138.262330138.219615138.482056138.549195138.732291138.787232138.970338139.354850139.202271139.269410138.982554139.379273139.446412139.891978139.952994140.270396140.276490140.545054140.697633140.520631140.728150140.636598140.850211140.752574140.935670140.892955141.045533141.484996141.265250141.301871141.015015141.155396141.112672141.680299141.643678142.058717142.003795142.168570142.186890142.1197520.1213010.1219420.1226590.1233000.1238040.1242160.1246730.1252080.1258330.1265040.1272670.1278930.1286870.1293270.1299220.1304110.1309450.1314180.1319520.1324400.1328670.1334170.1338590.1343480.1346830.1350650.1353390.1357820.1363310.1369110.1374910.1380860.1387120.1392000.1397030.1401310.1404820.1409700.1413820.1417940.1421290.1425870.1429230.1434110.1436400.1439300.1441280.1445100.1449070.1453030.1457460.1462040.1467380.147165684.01686.48686.20688.08687.40688.57689.22691.81691.90694.25695.54696.22697.55697.30698.53698.32699.64699.98700.91701.18702.11704.05703.28703.62702.17704.18704.51706.77707.07708.68708.71710.07710.84709.94710.99710.53711.61711.11712.04711.82712.59714.81713.70713.89712.44713.15712.93715.80715.62717.71717.44718.27718.36718.02
29.50622629.57641729.63134629.68322829.75036729.79919729.86022829.90905629.97924630.03722730.07079730.11352630.13488630.18066730.23559630.29967630.38512830.45531830.54687830.62316730.70556730.77880730.83678830.89477630.94359731.00768631.05346731.09618731.15722731.21825831.26708831.31286731.34948831.38000831.42577731.46850631.53258631.61498631.69433731.78283831.84692731.92931731.98424632.04528632.08495732.13988632.21313832.25280632.29247632.36266732.42065732.46032832.51525732.545777142.119752141.997672141.997672142.107554142.351695142.150269142.058717142.418834142.327271142.315074142.192994141.906138141.887818142.357798142.589713142.992555143.041373143.120738143.242799143.206178143.114634143.004752142.962037143.053590143.023072143.139029142.962037143.010875143.364879143.255015143.157349142.919312142.894898142.846070143.291636143.407594143.865357143.920298143.999635143.981334143.926392143.853150143.761598143.645631143.792115143.712769143.847056143.657838143.810435144.072877143.975211143.798219143.602916143.5906900.1475310.1478820.1481570.1484160.1487520.1489960.1493010.1495450.1498960.1501860.1503540.1505680.1506740.1509030.1511780.1514980.1519260.1522770.1527340.1531160.1535280.1538940.1541840.1544740.1547180.1550380.1552670.1554810.1557860.1560910.1563350.1565640.1567470.1569000.1571290.1573430.1576630.1580750.1584720.1589140.1592350.1596470.1599210.1602260.1604250.1606990.1610660.1612640.1614620.1618130.1621030.1623020.1625760.162729718.02717.40717.40717.96719.19718.18717.71719.53719.07719.01718.39716.94716.85719.22720.40722.43722.68723.08723.69723.51723.05722.49722.28722.74722.58723.17722.28722.52724.31723.76723.26722.06721.94721.69723.94724.53726.84727.12727.52727.43727.15726.78726.32725.73726.47726.07726.75725.79726.56727.89727.40726.50725.51725.45
32.56408832.61291832.65868732.72887832.80212732.87841632.96386833.04626833.10424633.17138733.22326733.28124633.31481833.38195633.44298733.48571633.54064833.59862633.65661733.68102633.72069733.75121733.79699833.85192733.89770833.97399734.05334834.12658834.20898734.27611734.33715634.39818734.45006734.50500834.56908834.60570634.65758634.71557734.77660734.81933734.86510834.89562834.93529634.97497635.02379735.09093635.17638735.24963735.33202735.41747635.48766735.56090735.62194635.670777143.511353144.005738144.030152144.518433144.524537144.634391144.603873144.567252144.390250144.371959144.243775144.347535144.335338144.414674144.274293144.335338144.689332144.451295144.365855144.140015144.103394144.017955144.426871144.542857144.890757144.994517144.970094145.116578144.994517144.915152144.786998144.756471144.738150144.683238144.860230144.664918144.719849144.957896144.872437144.744254144.585572144.463492144.420777144.854136144.963990145.342418145.342418145.440074145.501090145.440074145.293570145.208131145.086051145.1165780.1628200.1630650.1632930.1636440.1640110.1643920.1648190.1652310.1655210.1658570.1661160.1664060.1665740.1669100.1672150.1674290.1677030.1679930.1682830.1684050.1686030.1687560.1689850.1692600.1694890.1698700.1702670.1706330.1710450.1713810.1716860.1719910.1722500.1725250.1728450.1730290.1732880.1735780.1738830.1740970.1743260.1744780.1746760.1748750.1751190.1754550.1758820.1762480.1766600.1770870.1774380.1778050.1781100.178354725.05727.55727.67730.14730.17730.73730.57730.39729.49729.40728.75729.28729.21729.62728.91729.21731.00729.80729.37728.23728.04727.61729.68730.26732.02732.54732.42733.16732.54732.14731.50731.34731.25730.97731.87730.88731.16732.36731.93731.28730.48729.86729.65731.84732.39734.30734.30734.80735.10734.80734.06733.62733.01733.16
35.72265735.79284735.84777735.89049635.95153636.03088736.08886836.15600636.18957636.23839736.26891736.32384636.39403636.45507636.54662736.63512836.71142636.81213736.87011836.94030637.00439837.06847737.13256737.20580637.26684637.33703737.38891737.46520637.52624837.58117737.63000837.67577737.71850637.79479837.84667837.94433738.02672738.12743738.20983738.29833838.38378738.45397838.51501838.58214738.66454738.73778638.80187838.87206638.94836739.02465639.08263739.13756739.19555739.244388145.055533145.293570145.177613145.092154145.391236145.397330145.281373145.128795144.829713144.927379144.915152145.372935145.324098145.629273145.659791145.739137145.733033145.641471145.519410145.470572145.348512145.488892145.397330145.501090145.379039145.458375145.690318145.531617145.421754145.214234145.177613145.079957145.464478145.519410145.836793145.824595145.879517145.916139145.836793145.617076145.726930145.568238145.562135145.586558145.757457145.641471145.501090145.678092145.745231145.580455145.464478145.202037145.336314145.2996740.1786130.1789640.1792390.1794520.1797580.1801540.1804440.1807800.1809480.1811920.1813450.1816190.1819700.1822750.1827330.1831760.1835570.1840610.1843510.1847020.1850220.1853420.1856630.1860290.1863340.1866850.1869450.1873260.1876310.1879060.1881500.1883790.1885930.1889740.1892330.1897220.1901340.1906370.1910490.1914920.1919190.1922700.1925750.1929110.1933230.1936890.1940090.1943600.1947420.1951230.1954130.1956880.1959780.196222732.85734.06733.47733.04734.55734.58733.99733.22731.71732.21732.14734.46734.21735.75735.91736.31736.28735.81735.20734.95734.33735.04734.58735.10734.49734.89736.06735.26734.70733.65733.47732.98734.92735.20736.80736.74737.02737.20736.80735.69736.25735.44735.41735.54736.40735.81735.10736.00736.34735.51734.92733.59734.27734.09
39.30846839.37560639.47021839.55871639.67162739.76623639.86083839.93713740.02257640.09887540.17821640.24840740.33996940.39794740.48949540.55358740.65124840.73058940.80077540.85570640.92284540.97167841.04796741.12426641.22192741.32567741.44164941.55150741.64916841.74682941.82921741.92382642.01537942.10998842.19848942.28088742.35412942.44872942.53722542.62572642.71117542.77831942.84850942.91869542.99804543.09569743.19640943.31237643.42528643.55346543.67553543.79150743.88915843.995965145.617076145.647574145.830689145.989371145.885611145.964976145.751334145.751334145.635377145.580455145.586558145.519410145.678092145.592652145.482798145.665894145.592652145.470572145.458375145.128795145.208131145.195914145.537711145.446177145.745231145.757457145.781852145.617076145.513316145.391236145.385133145.238658145.330191145.189811145.324098145.147096145.067750145.189811145.098277145.006715144.945670144.603873144.640494144.677134144.854136144.823609144.945670144.970094144.872437144.738150144.524537144.323111144.097291143.9080720.1965420.1968780.1973510.1977940.1983580.1988310.1993040.1996860.2001130.2004940.2008910.2012420.2017000.2019900.2024470.2027680.2032560.2036530.2040040.2042790.2046140.2048580.2052400.2056210.2061100.2066280.2072080.2077580.2082460.2087340.2091460.2096190.2100770.2105500.2109920.2114040.2117710.2122440.2126860.2131290.2135560.2138920.2142430.2145930.2149900.2154780.2159820.2165620.2171260.2177670.2183780.2189580.2194460.219980735.69735.84736.77737.57737.05737.45736.37736.37735.78735.51735.54735.20736.00735.57735.01735.94735.57734.95734.89733.22733.62733.56735.29734.83736.34736.40736.52735.69735.17734.55734.52733.78734.24733.53734.21733.32732.91733.53733.07732.61732.30730.57730.76730.94731.84731.68732.30732.42731.93731.25730.17729.15728.01727.06
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a) GRAFICA DE ESFUERZO-DEFORMACION DEL ACERO GLOBAL.
Diagrama Esfuerzo-Deformacin Global
800
700
600
500
400
300
200
100
00.00 0.05 0.10 0.15 0.20 0.25
700
Diagrama Esfuerzo-Deformacin Local
600
500
400
300
200
100
00.000 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040
Para hallar el esfuerzo y la deformacin de fluencia se trazar una lnea offset paralela al tramo elstico en el diagrama de esfuerzo-deformacin local del elemento.
El inicio del offset ser a partir de una deformacin de 0.002 en el eje de las abscisas:
700
Diagrama Esfuerzo-Deformacin Local
600
500f prop400
300
200
100 0.002 f0
0.000 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040
Graficando una lnea paralela, se tienen los siguientes puntos aproximados del offset:
MPa MPa MPa
MPa
De la grfica se tiene que:Esfuerzo de Fluencia = y =450.00MPa
Deformacin de Fluencia = y =0.0042
Hallamos el lmite de proporcionalidad por inspeccin visual:Lmite de Proporcionalidad = prop = 420.00 MPa
Ahora el mdulo de elasticidad est definido por: = Modulo de Elasticidad = E = 200000.00 MPaPara hallar el esfuerzo ltimo se tiene en el diagrama global:
Diagrama Esfuerzo-Deformacin Global
800
u700
600
500
400
300
200
100
0r
0.00 0.05 0.10 0.15 0.20 0.25
Entonces tenemos:
Esfuerzo ltimo = u = 720.00
MPa
Del grfico anterior se puede extraer que la deformacin unitaria de ruptura es igual a:Deformacin Unitaria de Ruptura = r = 0.2310
Entonces el porcentaje de elongacin o ductilidad por elongacin ser calculado en base al anterior resultado obtenido:% de Elongacin = 100 x r = 23.10 %
Ahora para calcular el mdulo de resilencia debemos hallar el rea bajo la curva del diagrama esfuerzo- deformacin local en el intervalo elstico de la siguiente manera:
Diagrama Esfuerzo-Deformacin Local
700
600
500prop400
300
200100
0
UR
0.00230.000 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040
El grfico anterior tenemos un rea triangular a calcular:Mdulo de Resiliencia = rea Bajo Curva Elstica = UR = 0.483 MPa
Finalmente para calcular el mdulo de tenacidad necesitaremos calcular el rea bajo la curva del diagrama esfuerzo-deformacin global completo de la siguiente manera:
Diagrama Esfuerzo-Deformacin Global
800
700
600
500
400
300
200
100
0
UT 0.00 0.05 0.10 0.15 0.20