Recently, I am assigned a project to find reason why our lasor welded part has porosity in the welding bead. Under the microscope, gas bubbles are as large as 5/1000''. The porosity usually exists at the boundary between the bead and the substrate.
As I have little experience with welding...
Dear all:
I just have a question for my curiosity. For a normal linear isotropic structure, how does the stress converge to the theoretical value, as the mesh is refined? Is it asymptotically converge from bellow the theoretical value or above or first from bellow followed by an over shoot then...
I am trying to run a test problem involving Contact171 elements. It is a contact problem between two cantilevered beams. The upper beam bended over and touch the lower beam. But when I plot the von Mises stress, the lower beam has zero stress. It seems that I missed some settings for the contact...
I am looking for a linear displancement sensor to sense the displacement of a linear actuator. The idea is to make the actuator close loop controlled. Could any one point me to some such sensor makers?
Desired Spec
Volume < 1''X1''
Sensing technoledge: any
working temperature : -0 - 250F...
Dear friends:
I am in the process of selecting an eletric actuated globe valve. One of the specs I encountered is: Motor Running Time, 150sec. What does running time means?
thanks a lot,
I am transferring myself from solid mechanical FEM to electro-magnetic field FEM, due to job assignments. Could anybody suggest a good book on this topic.
Thanks a lot,
Due to a job assignment, I have to simulate the magnetic flux density of an actuator using ANSYS. Have are the two questions I have.
1) the soft magnetic material we are using is 1018. Its saturation point is about 2 Tesla. But the results I got have max 4 Tesla. Is it meaningful for this...
When the fatigue life is considered. Mean Stress and stress amplitude governs according to Goldman’s theory. Does the stress refer to von Mises or principle stress?
Thanks,
Some articles say that never assume single point load or support upon your model, because it will introduce stress singularity. Sounds reasonable. But I remember the FEA will always parse the load or restraint to each node, when the matrix function Kx=F is being built. How to explain this? The...
