Assignment 4-RADIOSS Material Laws Challenge

aim:

case1:Open Hyper mesh, go to >> import >> solver deck option >> browse File > Import. The “FAILURE_JOHNSON_0000.rad” file is selected and “import"

To run the simulation, Go to Analysis >> Radioss. We need to save the output files in a new folder so that we can access them easily. The file is saved as "Law2_epsmax_failure_0000.rad". After saving, tick the 'include connectors' box and type in '-nt 4' in the options text box as shown below, before clicking 'Radioss'It is recommended to be written as "-nt 4" . This means assigning the task to 4 cores in the system, to perform the simulation faster. It depends upon the process of our computer (it has a quad-core processor, then it should be taken as 4.

CASE2

this case, a few parameters are added to the defined case 1to visualize checking or braking down of elements with the help of 'Ixfem' option in Fail-Johnson failure model card. The necessary changes were made in the parameters

case3

the material model is same in case elastoplastic but the failure model card s removed to look for any difference in results. Hence, the Plas-Johnson card has deleted and the simulation was done.

case4

In this case, import the case 3 starter file - Law2_epsmax_nofail_0000.rad.This time, delete the EPS_p_max value (make it as 0). Going to the model tab, we can go to Materials > Aluminium

case5:

In this case import the main starter file - FAILURE_JOHNSON_0000.rad.After that, go to Materials card > Aluminium and change the card image to M1_ELAST, which is Law 1.Also set the values for Rho_Initial, E & Nu as follows:
Rho_initial = 0.0028, E = 71000.00, nu = 0.33

case6:

n this case, the material is Plas_brit which is an elastic-Plastic Material with additional parameters to define in nature of material such as eps_t1, t2, eps_f1, f2 eps_m1, m2, and dmax1, 2 which are a tensile failure in strain. Maximum tensile failure , tensile strain at element detection and maximum tensile damage to limit in two directions