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July 4, 2023 at 6:59 pmAavash BudhathokiSubscriber
Hello everyone,
I am trying to simulate the results of a tensile test using Ansys. My research advisor has provided me with the UTS, 0.2% yield strength, elastic modulus, and Poisson's ratio value for four specimens with different build combinations. I entered the values manually and created new materials in the materials library. Then, I proceeded to use Explicit Dynamics with the following parameters:
Mesh size - 0.001m
Fixed boundary condition, displacement - 0.03 m in 0.001 s
Despite having entered 27 MPa as the ultimate tensile strength value, the stress in the model exceeds that value without any signs of failure. I have been trying to replicate the experimental results for two weeks now but to no avail. I would be highly grateful if I could receive some assistance in this matter.
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The material under use is ABS.
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July 4, 2023 at 8:27 pmArminAnsys Employee
Hi Avash,
Have you selected any failure criterion for your material under Engineering Data? You can select from the list of available models (see picture below).
Providing only linear elastic data will not result in failure unless a certain strain limit is reached (accessible via Analysis Settings under "Erosion Controls" in the project schematic).
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