Abstract
In this chapter, the probabilistic porous-solid model is used to simulate the
tensile strength of unsaturated soils tested at different water contents. The strength of
unsaturated soils can be split into two parts: one related to the net stress and the other
to suction stress. The strength generated by suction has its origin in the additional
contact stresses induced to solid particles by water meniscus. This additional contact
stress is called matric suction stress when it is solely related to matric suction. In such
a case, the tensile strength of soils represents the matric suction stress of the material
at that particular water content. The numerical and experimental comparisons of the
tensile strength of unsaturated soils tested at different water contents show that the
probabilistic porous-solid model can simulate this phenomenon quite accurately.