-
-
October 3, 2024 at 7:42 am
1617836513
Subscriber -
October 3, 2024 at 7:44 am
1617836513
SubscriberThere are also plastic strain curves that do not conform to the curves in Figure 3 at all.
-
October 3, 2024 at 12:53 pm
Armin
Ansys EmployeeHello,
Could you describe more about your model? Is the first plot associated with a uniaxial tensile simulation versus experiment? I can see that one of the simulation curves (red) is overshooting the experiment (black) while the other red curve is in good agreement.
-
October 3, 2024 at 1:53 pm
1617836513
SubscriberHello, I am doing a torsion test on such a screw: nail the bottom of the bone nail, apply the distal displacement to the transmission section, and output the maximum reaction torque. The black curve is the stress-strain curve of the screw material through uniaxial tension. In the simulation results, in a certain area after the yield point is exceeded, the calculation seems to be calculated according to the linear elasticity, resulting in a sudden change in the data near the yield point, so the simulation results in the elastic phase are consistent with the test, but not in the plastic stage. I've turned on the big deformation and increased the value of the substep, and still haven't captured the yield point and the data near it.
-
-
October 3, 2024 at 3:47 pm
Armin
Ansys EmployeeThanks. I assume you're plotting the equivalent stress versus strain. Do you see the same behavior in all regions or only in the element where stress is the highest? If so, I suggest that you try refining the mesh in that area to see if the predictions improve.
-
October 3, 2024 at 4:01 pm
1617836513
SubscriberThanks, I did take the stress-strain curve for the maximum value only. I want to test the following effect of different materials on the maximum torque of the screw, the stress-strain curve of the simulation result of material 1 is in line with the real curve of the material. So I based on this model, keeping the meshing and other conditions the same, and just changed material 1 to material 2, but the results for material 2 are as you can see. If the mesh is changed, does that still give the effect of comparing the effect of screws of different materials on the maximum torque?
-
-
- You must be logged in to reply to this topic.
- At least one body has been found to have only 1 element in at least 2 directions
- Script Error Code:800a000d
- Element has excessive thickness change, distortion, is turning inside out
- Image to file in Mechanical is bugged and does not show text
- Help to do quasistatic analysis in static structural module
-
1942
-
865
-
599
-
591
-
366
© 2025 Copyright ANSYS, Inc. All rights reserved.