PLate Impact based on Johnson Cook Parameters

Finite Element Analysis (FEA) Tutorial Project: Impact Loading using the Johnson-Cook Plasticity-Damage Model Problem • Analyze the impact loading of an object on aluminum plates using FEA tool ABAQUS Plate Dimensions: t= 26.3 mm w=304 mm L= 304 mm Projectile Dimensions: d= 12.9 mm lp= 88.9 mm lp L=304 mm • Determine: • Plot d t= 26.3 mm Preprocessing Creating The Geometry • Open ABAQUS/CAE and create a new parts: – Aluminum Plate – Projectile . Creating The Geometry • Aluminum Plate . Creating The Geometry • Projectile . 3 8.7E-009 Projectile 202000 0.6E-009 .35 2.Material Properties • Aluminum Plate and Projectile Model Part Young Modulus (MPa) Poisson Ratio Density (Tonne/mm^3) Aluminum Plate 69000 0. 03 0.2783 1.0 [1/s] .1 0.Material Properties • Aluminum Plate and Projectile Plastic Data m C ε0 Johnson-Cook Plasticity A [Mpa] B [Mpa] n Aluminum Plate 262 162.7 1.014 15.34 - - Projectile 1430 2545 0. 85 20.6 651.45 0.05 1 .47 0 1.77 1.Material Properties • Aluminum Plate Johnson-Cook Dynamic Failure Model Material d1 d2 d3 d4 d5 Melting Temperature (°C) Transition Temperature (°C) Reference Strain Rate 1/s Aluminum Plate -0. 1 ABAQUS Material Definition 4 3 5 2 . 9 .ABAQUS Material Definition • Add Damage Evolution • Set the displacement at failure to 0. Creating an Assembly • Double click on instances • Set the projectile 100 mm from the origin (center of the plate ) . Normal Behavior . select contact. Select Mechanical.Interactions properties • Double click in interaction properties. Interaction properties continued • Select the default set and click OK . All with self and add the created IntProp-1 in individual property assignment .Interactions • Double click on Interactions. General Contact. Creating Mesh (partitioning) Aluminum Plate • Create a Partition of the plate • Seed edges and select the partition lines . Creating Mesh (Continued) • Repeat the procedure in the opposite directions for the rest of the internal lines . Creating Mesh . Creating Mesh Projectile • Create a Partition of the projectile • Select an the approximate global size . Creating Mesh • From Mesh Element Type Select Element Deletion for the Plate and the projectile . Creating a Step • Double click Steps under Model tree and Create step window will pop up • This time you will modify the time period . Field Output Request • Select SDEG scalar Stiffness degradation and Status as output variables . Boundary Conditions . Results with v3 =-700000 and displacement at failure 0.9 Time t0 Time t2 Time t1 Time t3 . Results Time t4 Time t6 Time t5 Time t7 . Results Time t8 Time t9 Time t10 Time t11 . Results . Rebound of the projectile • Change the value of predefined velocity field • Delete the damage evolution in Materials Aluminum Plate . Boundary Conditions . Delete the Damage Evolution . Results Time t0 Time t2 . 9 and keep damage evolution. • Comment on the results for Von Mises stress.Conduct simulations • Change the values of displacements at failure from 0. . the trajectory of the projectile and the velocity • Improve the model using your favorite meshing technique to refine the center of the plate or reduce the geometry to the half or a quarter. the morphology of the plate and the hole.1 to 0. 000 mm/s to 1.Notes • By modifying the velocity from 100. .000 000 mm/s consider the time that you need to input on step-time period.