Solving Nonlinear Differential Algebraic Equations by an Implicit 𝐺𝐿(𝑛,ℝ) Lie-Group Method

Figure 1

Example 1 of a plastic equation to compute the stresses, showing the numerical errors of (a) 𝑄₁, (b) 𝑄₂, and (c) consistency condition.

(a)

(b)

(c)