UNIVERSIDAD DE LAS FUERZAS ARMADAS-ESPE

INGENIERA MECNICA

Nombre: Boris Pumisacho

Fecha: 13 de Noviembre del 2014

NRC: 1896

Una probeta cilndrica con dimetro 12,80 mm y una longitud de prueba de 50,80 mm es estirada a traccin. Con los datos obtenidos: a) Construya la grfica esfuerzo vs. Deformacin ingenieril y real.b) Encuentre k y n.

DATOS:

P (N)Li (mm)

050,800

1270050,825

2540050,851

3810050,876

5080050,902

7620050,952

8910051,003

9270051,054

10250051,181

10780051,308

11940051,562

12830051,816

14970052,832

15900053,848

16040054,356

15950054,864

15150055,880

12470056,642

CALCULOS:

L (mm) (Mpa)Ai (mm)r (Mpa)real cal% error

0,00000,00000,0000128,67960,00000,00000

0,025098,69470,0005128,616398,74330,0005519,56456426,1771

0,0510197,38940,0010128,5506197,58760,0010588,91549198,05286

0,0760296,08410,0015128,4874296,52710,0015631,67022113,02276

0,1020394,77890,0020128,4218395,57150,0020665,1747868,155372

0,1520592,16830,0030128,2958593,94010,0030713,435120,119024

0,2030692,41730,0040128,1675695,18420,0040750,59557,9707367

0,2540720,39370,0050128,0394723,99570,0050780,692027,8310327

0,3810796,55180,0075127,7217802,52600,0075838,188394,4437705

0,5080837,73940,0100127,4056846,11680,0100881,477284,1791504

0,7620927,88580,0150126,7780941,80400,0149946,191540,4658617

1,0160997,04980,0200126,15651016,99080,0198994,84442,1776364

2,03201163,35420,0400123,73041209,88840,03921121,8417,2773164

3,04801235,62680,0600121,39591309,76440,05831202,69398,1747914

3,55601246,50650,0700120,26131333,76190,06771234,70197,4271131

4,06401239,51240,0800119,14781338,67340,07701262,98365,6540858

5,08001177,34250,1000116,98151295,07670,09531311,36621,257798

5,8420969,07330,1150115,40771080,51670,10891342,359424,233098

a)

b)