Week 1 Stress Concentration on a Plate with hole

case 1:

Max Total deformation=2.7492e-4 mm

Max Equivalent stress=0.60542 Mpa

case 2:

Max Total deformation=2.9728e-4 mm

Max Equivalent stress=0.5826 Mpa

1.From an analysis standpoint, i would select the model in case1, It provides less damage to the model, because the stress developed is slightly higher,deformation in lower than case 2.

But if you consider the case in crash, the metal are designed to get deformed where the stress get distributed and deformation is higher like in case 2.Here we are not considering the crash. so, i would select the case 1 in analysis point of view.

2.From a manufacturing standpoint,i would select the model in case 1, because in machining, to drill the metal (300*120*30) with 60mm dia at center is easy, 1 step process.But with 30mm dia on both sides is 2 step process, might be a need to change in drill tool.so, i would select case 1 in manufacturing standpoint.