The integration constant is obtained by requiring that the strain vanishes when the length \(l\) is equal to the gauge initial, reference length \(l_o\), which gives \(C = − \ln l_o\). It follows from...The integration constant is obtained by requiring that the strain vanishes when the length \(l\) is equal to the gauge initial, reference length \(l_o\), which gives \(C = − \ln l_o\). It follows from the flow rule (to be formulated later) that in uniaxial tension in \(x_1\) direction the components \(\dot{\epsilon}_{22} = \dot{\epsilon}_{33}\).