I'm trying to model a pavement made of area elements. The loading pulls the pavement at one end and link elements are used to simulate friction. A temperature decrease is also applied. This puts the material intension. However, when I plot the output stress-strain values, the stresses are much higher than the material strength (see attached images). I've checked the units and that is not the problem. Please explain, what is the reason behind this and how can this be fixed?