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July 11, 2025 at 7:09 am
keisuke.karikomi.7v
Subscriberお世話になっております。
ANSYS AUTODYNにて、「Contour」や「Gauge Point」などで「P. STRESS. 1」や「P. STRESS. 2」などで出力される最大主応力、最小主応力の値が+の値であれば引張応力、-の値であれば圧縮応力を示すと認識しているのですが、その引張や圧縮がどの方向に働いているのかの確認方法があれば教えていただきたいです。
また、上記の値や、方向は2Dの「Axial」の場合と、「Planar」の場合でどのように扱いが合わるのか、座標系がどのようにかわるのかも併せて教えていただきたいです。よろしくお願いいたします。
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July 15, 2025 at 4:11 pm
Chris Quan
Ansys EmployeeFor 2D strucutred Lagrangian solvers like Lagrange/ALE as well as SPH Particles, there is a variable called P.ST. ANG, which is the Angle of Principal Stress. This variable can be "Examined" in Autodyn GUI or included in Time History plot at a gauge point. This variable cannot be contour-plotted. See the pictures below. Its unit is degree. This variable can be used in either "Axial" or "Planar" symmetry.
Due to stress wave propagation and interactions, this variable is not necessarily a constant and may exhibit a lot of oscillations.
Please be aware that this variable is not available for 2D structured shell solver, Euler solver, and FCT solver. It is also not available for 2D unstructured Lagrange solver.
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July 16, 2025 at 3:30 am
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July 16, 2025 at 2:21 pm
Chris Quan
Ansys EmployeeYou can run a simple model to test the direction of p.st.ang. I think that the axis of the reference axis is the X axis.
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