hod of</span>
<span class="sd">        subclassing numpy ndarrays.</span>

<span class="sd">        Args:</span>
<span class="sd">            stress_matrix (3x3 array-like): the 3x3 array-like</span>
<span class="sd">                representing the stress</span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="n">obj</span> <span class="o">=</span> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__new__</span><span class="p">(</span><spa