Assignment 3

Simulation Report

• Without any of the recommended properties

• Input RAD and Engine RAD files were imported to Hypermesh using “Import Solver deck” option.
• Units for the simulation run were checked in the "Begin Card” and found to be exact.
• Simulation run time was changed from 60 ms to 55 ms in the “Engine Run” card.
• Time frequency was changed to 0.93 ms and 2.3 ms to obtain 25 and 60 animation files respectively.
• No properties of Shell elements were changed.

RUN 1	TIME=55 ms ANIM_DT=60
Hourglass Stabilization	No Hourglass Stabilization
Mass Error	-10.3%

• Mass Error of -10.3% was reported because of no Hourglass Stabilization.
• Graphs for all the mentioned properties were plotted.
• Result file is attached.

Simulation Report

Parameter	Comment
Ishell = 24	QEPH 4- nodded shell elements are the best in terms of cost and accuracy.
Ismstr = 2	Full Geometric Non linearity’s (default) with possible small strain formulation activation in RADIOSS Engine.
Ish3n = 2	Standard 3-nodded shell with modification for large rotation.
N = 5	Number of integration points set to 5 for maximum accuracy.
Ithick = 1	Thickness change is taken into account for accuracy.
Iplas = 1	Iterative plasticity for good accuracy.

• With best practice guidelines

• Input RAD and Engine RAD files were imported to Hypermesh using “Import Solver deck” option.
• Units for the simulation run were checked in the "Begin Card” and found to be exact.
• Simulation run time was changed from 60 ms to 55 ms in the “Engine Run” card.
• Time frequency was changed to 0.93 ms and 2.3 ms to obtain 25 and 60 animation files respectively.
• Element properties were altered to above mentioned parameters.

RUN 2	TIME=55 ms ANIM_DT=60
Hourglass Stabilization	Physical Hourglass Stabilization
Mass Error	-0.1%

• Result files are attached.
• Hourglass stabilization are found to be in the required range.