Explicitly justify the symmetry relations (4.2.4). Note that the first relation follows directly from the symmetry of the stress, while the second condition requires a simple expansion into the form e_kl = 1/2 (e_kl + e_lk) to arrive at the required conclusion.

Equation 4.2.4

Transcribed Image Text:

Cijkl = Cjikl Cijkl = Cijlk