MohrCoulombszilárdsági

MohrCoulombszilárdsági refers to a failure criterion used in soil mechanics and rock mechanics to predict the shear strength of a material. It combines the concepts of the Mohr failure criterion and the Coulomb failure criterion. The Mohr failure criterion states that failure occurs when the shear stress on a plane reaches a critical value that depends on the normal stress acting on that plane. The Coulomb failure criterion, a specific application of the Mohr criterion for soils, introduces two parameters: cohesion (c) and the angle of internal friction (phi). Cohesion represents the shear strength of a material in the absence of normal stress, while the angle of internal friction accounts for the interlocking and frictional resistance between particles.

The MohrCoulombszilárdsági criterion expresses the shear strength (tau_f) as a linear function of the normal stress (sigma_n) acting on the failure plane: tau_f = c + sigma_n * tan(phi). This means that as the normal stress increases, the shear strength of the material also increases. The criterion is widely used in geotechnical engineering to analyze the stability of slopes, foundations, and retaining walls, as well as to design tunnels and other underground structures. It provides a fundamental basis for understanding how soils and rocks behave under shear loading and predicting when failure will occur. The parameters c and phi are typically determined through laboratory testing, such as triaxial compression tests or direct shear tests.