GEOLOGY

Detailed explanation-1: -Compressive stress is the normal force per area ( = F/A) that causes an object to decrease in length.

Detailed explanation-2: -If the force pulls the member (tension) it results in a tensile stress; if the force pushes the member (compression) it results in compressive stress. Tensile stresses stretch a member and compressive stresses squeeze a member.

Detailed explanation-3: -The different types of strain are longitudinal, lateral, shear and volumetric.

Detailed explanation-4: -Stress is the measure of an external force acting over the cross sectional area of an object. Stress has units of force per area: N/m2 (SI) or lb/in2 (US). The SI units are commonly referred to as Pascals, abbreviated Pa.

Detailed explanation-5: -Just like stress, there are two types of strain that a structure can experience: 1. Normal Strain and 2. Shear Strain. When a force acts perpendicular (or “normal") to the surface of an object, it exerts a normal stress.