Open victorkemp opened 1 year ago
The ends of the element seems to be connected to constraints, other truss elements, and forces by only the corner nodes so their stiffness is lower than what you specify.
*NODE 1,0,0.0005,0 2,0,0.00025,0 3,0,0.00075,0 4,0,0.001,0 5,0,0,0 *ELEMENT,TYPE=T3D3,ELSET=Eall 1,1,3,4 2,5,2,1 *MATERIAL,NAME=Material *ELASTIC,TYPE=ISOTROPIC 2000000000,0 *SOLID SECTION,ELSET=Eall,MATERIAL=Material 4E-08 *BOUNDARY 4,1,3,0 *STEP *STATIC *CLOAD 5,2,-10 *NODE FILE,GLOBAL=YES,OUTPUT=3D U *END STEP
The axial displacement should be u = F L / (E A) = -10×0.001/(2e9×4e-8) = -0.000125 but it's more like -0.00022
The ends of the element seems to be connected to constraints, other truss elements, and forces by only the corner nodes so their stiffness is lower than what you specify.
The axial displacement should be u = F L / (E A) = -10×0.001/(2e9×4e-8) = -0.000125 but it's more like -0.00022