El 28/09/2011, a las 09:17, D. Mukhopadhyay escribió: > Stress across a particular surface is a vector; stress at a point connotes surface stresses on planes of all possible orientations passing through the point; it is a symmetric tensor of 3rd rank. If I am not wrong (wouldn't be the first time, nor the last), stress is a second order tensor, not third. All the best! ______________________________ Dr. Luis Arlegui Area de Geodinámica Interna Dpto. Ciencias de la Tierra Universidad de Zaragoza [log in to unmask]