Assignment 3-2D Element Formulation Challenge
Aim:
Comparison of results with base simulation and improved shell element properties
Before shell element property change
CYCLE TIME TIME-STEP ELEMENT ERROR I-ENERGY K-ENERGY T K-ENERGY R EXT-WORK MAS.ERR TOTAL MASS MASS ADDED
29150 54.88 0.1965E-02 NODE 711 -10.3% 0.1928E+08 0.3569E+08 0.2223E+05 -3801. 0.1659E-03 0.5040E+06 83.59
29160 54.90 0.1965E-02 NODE 711 -10.3% 0.1929E+08 0.3568E+08 0.2203E+05 -3971. 0.1659E-03 0.5040E+06 83.59
29170 54.92 0.1965E-02 NODE 711 -10.3% 0.1930E+08 0.3567E+08 0.2207E+05 -3973. 0.1659E-03 0.5040E+06 83.59
29180 54.94 0.1963E-02 NODE 711 -10.3% 0.1930E+08 0.3566E+08 0.2193E+05 -3974. 0.1659E-03 0.5040E+06 83.59
29190 54.96 0.1964E-02 NODE 711 -10.3% 0.1931E+08 0.3564E+08 0.2193E+05 -3974. 0.1659E-03 0.5040E+06 83.59
29200 54.98 0.1965E-02 NODE 711 -10.3% 0.1932E+08 0.3563E+08 0.2197E+05 -3980. 0.1659E-03 0.5040E+06 83.59
Energy Error: -0.0% to -10.3% which is within the acceptable range
Mass Error: 0.0001659
No of Cycles:29211
Simulation time:38ms
After shell element property change:
CYCLE TIME TIME-STEP ELEMENT ERROR I-ENERGY K-ENERGY T K-ENERGY R EXT-WORK MAS.ERR TOTAL MASS MASS ADDED
28890 54.81 0.1799E-02 NODE 708 -0.1% 0.1744E+08 0.4382E+08 2109. -1089. 0.1659E-03 0.5040E+06 83.59
28900 54.83 0.1802E-02 NODE 708 -0.1% 0.1745E+08 0.4381E+08 2312. -1089. 0.1659E-03 0.5040E+06 83.59
28910 54.85 0.1803E-02 NODE 708 -0.1% 0.1745E+08 0.4381E+08 2522. -1089. 0.1659E-03 0.5040E+06 83.59
28920 54.87 0.1805E-02 NODE 708 -0.1% 0.1746E+08 0.4380E+08 2645. -1089. 0.1659E-03 0.5040E+06 83.59
28930 54.88 0.1797E-02 NODE 708 -0.1% 0.1746E+08 0.4380E+08 2704. -1089. 0.1659E-03 0.5040E+06 83.59
28940 54.90 0.1796E-02 NODE 708 -0.1% 0.1747E+08 0.4379E+08 2808. -1089. 0.1659E-03 0.5040E+06 83.59
28950 54.92 0.1794E-02 NODE 708 -0.1% 0.1747E+08 0.4379E+08 2905. -1089. 0.1659E-03 0.5040E+06 83.59
28960 54.94 0.1796E-02 NODE 708 -0.1% 0.1747E+08 0.4378E+08 2982. -1089. 0.1659E-03 0.5040E+06 83.59
28970 54.96 0.1792E-02 NODE 708 -0.1% 0.1748E+08 0.4378E+08 3100. -1089. 0.1659E-03 0.5040E+06 83.59
28980 54.97 0.1791E-02 NODE 708 -0.1% 0.1748E+08 0.4377E+08 3247. -1089. 0.1659E-03 0.5040E+06 83.59
28990 54.99 0.1797E-02 NODE 708 -0.1% 0.1749E+08 0.4377E+08 3364. -1089. 0.1659E-03 0.5040E+06 83.59
Energy error: -0.1% which is acceptable range.
Mass error:0.0001659
No of cycles:28990
Simulation time:38ms
Simulation Results
Condition1: @base simulation condition
Displacement contour plot:
Von mises stress:
Energy plots:
Resultant force Vs Time:
Condition2:
Simulation after Improved shell elements properties
Displacement contour plot:
Von mises stress:
Energy plots:
Resultant force Vs time:
Comparison between base simulation and improved shell element property
|
perameters |
Base simulation |
Improved shell element property |
Remark |
|
Energy error |
-10.3% |
-1.0% |
Both cases It is within acceptable range |
|
Mass error |
0.0001659 |
0.0001659 |
Remain same |
|
Total energy |
Total energy decreases as time increases |
Total energy remain constant as time increases |
|
|
Hourglass energy |
Hourglass energy increases as time increases |
Hourglass remain constant against increase of time |
|
|
Displacement |
Max:761@169 node, min:0.0@81502 node |
Max:781@165 node, min:0.0@81502 node |
Displacement got increased slightly after shell improved property |
|
Von mises stress |
Max:343.7@582 node, min:0.0@716ode |
Max:332.3@615 node, min:0.0@716 node |
Small decrease of Max Von mises stress after shell improved property |
Files:
Base simulation:shell3 assignment.h3d,shell3 assignmentT01
improved shell property:beam.h3d,beamT01
Modle:beam.hm