Week-6 Calculate the Stretch Ratio by comparing the ELFORM (-2,-1,1,2) with Ogden_Material Model.
OBJECTIVE:
To simulate tensile behaviour in lsdyna
Using Engg stress strain and stretch ratio
Create implicit cards for the simulation
Plot the Nominal stress and stretch ratio on graph
EXPLANATION :
The given model is imported in lsdyna
Created a solid box 10mmx10mmx10mm solid box is created
This was done by shape mesher from element and mesh
Defined a section card using model section solid
Here the ELFORM is 1 for the simulation
This is done to understand the uniaxial behaviour and compare the results
Using Elform 1 -1 2 -2 are simulated
Material card was created for poissons ratio Mass density
Boundary condition was created for the tensile test
Two boundary conditions like spc and prescribed motion set was used
Conrol cards for implicit analysis was used
control implicit general here the imflag was set 1
control implicit time was used for the timestep for the simulation
control termination for the end time of simulation
Database :
Used to generate the output results
Database binary D3 plot was used which it stores stress strain
database extent binary STRFLG 1 which writes strain tensor data D3plot ELOUT
Results :
Solid blocks of given dimensions was created for tensile test and various results was observed
in simulation was observed while using ELFORM and compared using stretch ratio 5
| ELFORM 1 | |||||
| ID 550 | |||||
| Time(sec) | True stress | True strain | Eng stress | Eng strain | stretch ratio |
| 0.00E+00 | 0.00E+00 | 0.00E+00 | 0 | 0 | 1 |
| 1.05E-01 | 2.39E-01 | 1.86E-01 | 0.198429741 | 0.20402801 | 1.20402801 |
| 2.11E-01 | 4.46E-01 | 2.64E-01 | 0.342757817 | 0.30225762 | 1.30225762 |
| 3.16E-01 | 6.54E-01 | 3.43E-01 | 0.464183492 | 0.408501168 | 1.408501168 |
| 4.21E-01 | 8.61E-01 | 4.21E-01 | 0.565340648 | 0.523412594 | 1.523412594 |
| 5.26E-01 | 1.07E+00 | 4.99E-01 | 0.648596103 | 0.647698975 | 1.647698975 |
| 6.32E-01 | 1.28E+00 | 5.78E-01 | 0.716074983 | 0.782125107 | 1.782125107 |
| 7.37E-01 | 1.48E+00 | 6.56E-01 | 0.769683636 | 0.927518281 | 1.927518281 |
| 8.42E-01 | 1.69E+00 | 7.35E-01 | 0.811130544 | 1.084773359 | 2.084773359 |
| 9.47E-01 | 1.90E+00 | 8.13E-01 | 0.841945453 | 1.254857836 | 2.254857836 |
| 1.05E+00 | 2.11E+00 | 8.92E-01 | 0.863496554 | 1.438818366 | 2.438818366 |
| 1.16E+00 | 2.31E+00 | 9.70E-01 | 0.877006019 | 1.637787149 | 2.637787149 |
| 1.26E+00 | 2.52E+00 | 1.05E+00 | 0.883564447 | 1.852988449 | 2.852988449 |
| 1.37E+00 | 2.73E+00 | 1.13E+00 | 0.884143404 | 2.08574729 | 3.08574729 |
| 1.47E+00 | 2.94E+00 | 1.21E+00 | 0.879607881 | 2.337495182 | 3.337495182 |
| 1.58E+00 | 3.14E+00 | 1.28E+00 | 0.870726132 | 2.609781697 | 3.609781697 |
| 1.68E+00 | 3.35E+00 | 1.36E+00 | 0.858179449 | 2.904282461 | 3.904282461 |
| 1.79E+00 | 3.56E+00 | 1.44E+00 | 0.842571437 | 3.222809801 | 4.222809801 |
| 1.89E+00 | 3.77E+00 | 1.52E+00 | 0.824435162 | 3.567324451 | 4.567324451 |
| 2.00E+00 | 3.97E+00 | 1.60E+00 | 0.804240982 | 3.939946649 | 4.939946649 |
| ELFORM 2 | |||||
| ID 550 | |||||
| Time(sec) | True stress | True strain | Eng stress | Eng strain | stretch ratio |
| 0.00E+00 | 0.00E+00 | 0.00E+00 | 0 | 0 | 1 |
| 1.05E-01 | 2.39E-01 | 1.86E-01 | 0.198422006 | 0.20402801 | 1.20402801 |
| 2.11E-01 | 4.46E-01 | 2.64E-01 | 0.34260769 | 0.30225762 | 1.30225762 |
| 3.16E-01 | 6.53E-01 | 3.43E-01 | 0.463912489 | 0.408501168 | 1.408501168 |
| 4.21E-01 | 8.61E-01 | 4.21E-01 | 0.564967858 | 0.523412594 | 1.523412594 |
| 5.26E-01 | 1.07E+00 | 4.99E-01 | 0.648138424 | 0.647698975 | 1.647698975 |
| 6.32E-01 | 1.28E+00 | 5.78E-01 | 0.715547342 | 0.782125107 | 1.782125107 |
| 7.37E-01 | 1.48E+00 | 6.56E-01 | 0.769099191 | 0.927518281 | 1.927518281 |
| 8.42E-01 | 1.69E+00 | 7.35E-01 | 0.810500811 | 1.084773359 | 2.084773359 |
| 9.47E-01 | 1.90E+00 | 8.13E-01 | 0.841280747 | 1.254857836 | 2.254857836 |
| 1.05E+00 | 2.10E+00 | 8.92E-01 | 0.862805587 | 1.438818366 | 2.438818366 |
| 1.16E+00 | 2.31E+00 | 9.70E-01 | 0.876296581 | 1.637787149 | 2.637787149 |
| 1.26E+00 | 2.52E+00 | 1.05E+00 | 0.882843338 | 1.852988449 | 2.852988449 |
| 1.37E+00 | 2.73E+00 | 1.13E+00 | 0.883416268 | 2.08574729 | 3.08574729 |
| 1.47E+00 | 2.93E+00 | 1.21E+00 | 0.878879802 | 2.337495182 | 3.337495182 |
| 1.58E+00 | 3.14E+00 | 1.28E+00 | 0.870001323 | 2.609781697 | 3.609781697 |
| 1.68E+00 | 3.35E+00 | 1.36E+00 | 0.85746168 | 2.904282461 | 3.904282461 |
| 1.79E+00 | 3.56E+00 | 1.44E+00 | 0.841863715 | 3.222809801 | 4.222809801 |
| 1.89E+00 | 3.76E+00 | 1.52E+00 | 0.823740055 | 3.567324451 | 4.567324451 |
| 2.00E+00 | 3.97E+00 | 1.60E+00 | 0.803560613 | 3.939946649 | 4.939946649 |
| ELFORM -1 | |||||
| ID 550 | |||||
| Time(sec) | True stress | True strain | Eng stress | Eng strain | stretch ratio |
| 0.00E+00 | -2.23E-16 | 0.00E+00 | -2.231E-16 | 0 | 1 |
| 1.05E-01 | 2.39E-01 | 1.86E-01 | 0.198428873 | 0.204031024 | 1.204031024 |
| 2.11E-01 | 4.46E-01 | 2.64E-01 | 0.342502474 | 0.302238875 | 1.302238875 |
| 3.16E-01 | 6.53E-01 | 3.42E-01 | 0.463717005 | 0.408457136 | 1.408457136 |
| 4.21E-01 | 8.60E-01 | 4.21E-01 | 0.564700906 | 0.523339227 | 1.523339227 |
| 5.26E-01 | 1.07E+00 | 4.99E-01 | 0.647816238 | 0.647591733 | 1.647591733 |
| 6.32E-01 | 1.27E+00 | 5.78E-01 | 0.7151836 | 0.781979056 | 1.781979056 |
| 7.37E-01 | 1.48E+00 | 6.56E-01 | 0.768705619 | 0.927327804 | 1.927327804 |
| 8.42E-01 | 1.69E+00 | 7.35E-01 | 0.810087437 | 1.084532056 | 2.084532056 |
| 9.47E-01 | 1.90E+00 | 8.13E-01 | 0.840855752 | 1.254558816 | 2.254558816 |
| 1.05E+00 | 2.10E+00 | 8.91E-01 | 0.862376089 | 1.438453818 | 2.438453818 |
| 1.16E+00 | 2.31E+00 | 9.70E-01 | 0.875868235 | 1.637348372 | 2.637348372 |
| 1.26E+00 | 2.52E+00 | 1.05E+00 | 0.882420781 | 1.852465759 | 2.852465759 |
| 1.37E+00 | 2.72E+00 | 1.13E+00 | 0.883003535 | 2.085129732 | 3.085129732 |
| 1.47E+00 | 2.93E+00 | 1.21E+00 | 0.878479845 | 2.336770757 | 3.336770757 |
| 1.58E+00 | 3.14E+00 | 1.28E+00 | 0.869616507 | 2.608937079 | 3.608937079 |
| 1.68E+00 | 3.35E+00 | 1.36E+00 | 0.857093691 | 2.903303326 | 3.903303326 |
| 1.79E+00 | 3.55E+00 | 1.44E+00 | 0.841513953 | 3.221679321 | 4.221679321 |
| 1.89E+00 | 3.76E+00 | 1.52E+00 | 0.823409452 | 3.566024448 | 4.566024448 |
| 2.00E+00 | 3.97E+00 | 1.60E+00 | 0.803249545 | 3.938457577 | 4.938457577 |
| ELFORM -2 | |||||
| ID 550 | |||||
| Time(sec) | True stress | True strain | Eng stress | Eng strain | stretch ratio |
| 0.00E+00 | 1.26E-16 | 0.00E+00 | 1.25692E-16 | 0 | 1 |
| 1.05E-01 | 2.39E-01 | 1.86E-01 | 0.198445453 | 0.204035402 | 1.204035402 |
| 2.11E-01 | 4.46E-01 | 2.64E-01 | 0.342812351 | 0.302338387 | 1.302338387 |
| 3.16E-01 | 6.54E-01 | 3.43E-01 | 0.464254438 | 0.408667238 | 1.408667238 |
| 4.21E-01 | 8.62E-01 | 4.21E-01 | 0.56540992 | 0.523677352 | 1.523677352 |
| 5.26E-01 | 1.07E+00 | 5.00E-01 | 0.648649624 | 0.648077424 | 1.648077424 |
| 6.32E-01 | 1.28E+00 | 5.78E-01 | 0.716101571 | 0.782634093 | 1.782634093 |
| 7.37E-01 | 1.48E+00 | 6.57E-01 | 0.769675061 | 0.928176478 | 1.928176478 |
| 8.42E-01 | 1.69E+00 | 7.35E-01 | 0.811080905 | 1.085601731 | 2.085601731 |
| 9.47E-01 | 1.90E+00 | 8.14E-01 | 0.841850775 | 1.25587991 | 2.25587991 |
| 1.05E+00 | 2.11E+00 | 8.92E-01 | 0.863354309 | 1.440060243 | 2.440060243 |
| 1.16E+00 | 2.31E+00 | 9.71E-01 | 0.876815086 | 1.639277899 | 2.639277899 |
| 1.26E+00 | 2.52E+00 | 1.05E+00 | 0.883324884 | 1.854760594 | 2.854760594 |
| 1.37E+00 | 2.73E+00 | 1.13E+00 | 0.883856195 | 2.08783628 | 3.08783628 |
| 1.47E+00 | 2.94E+00 | 1.21E+00 | 0.879274541 | 2.339941328 | 3.339941328 |
| 1.58E+00 | 3.14E+00 | 1.28E+00 | 0.870348768 | 2.612629384 | 3.612629384 |
| 1.68E+00 | 3.35E+00 | 1.36E+00 | 0.857760845 | 2.907580936 | 3.907580936 |
| 1.79E+00 | 3.56E+00 | 1.44E+00 | 0.842114361 | 3.22661368 | 4.22661368 |
| 1.89E+00 | 3.77E+00 | 1.52E+00 | 0.823942877 | 3.571693714 | 4.571693714 |
| 2.00E+00 | 3.97E+00 | 1.60E+00 | 0.803716575 | 3.944948835 | 4.944948835 |