Reply To: Plasticity: Extract nodal solution from specific steps, substep

[Debanjan Debnath]

Hello,

Stress is initially calculated at the integration points within each element and subsequently interpolated to nodes through linear extrapolation. When multiple elements (e.g., three) share a node, each element provides an extrapolated stress value at that node (such as σ₁, σ₂, σ₃), referred to as unaveraged stress. With the average display option enabled, the stress value shown at the node is the mean of these extrapolated values, calculated as: σ₁ + σ₂ + σ₃ 3 .

For midside nodes, you may be required to use input computeMidSideNodes = True as shown in the figure below.

The following sample script might be helpful. Where ENS stores the elemental-nodal result.

analysis = Model.Analyses[0]
reader = analysis.GetResultsData()
elem_id = 32
Sp = reader.GetResult('PRIN_S')
Sp.SelectComponents(['1'])
ENS = Sp.GetElementValues([elem_id], True)

Thank you.