Shear force

Shear force is the force that acts parallel to the surface of a material, causing one layer to slide or slide past another. Imagine a deck of cards; if you push on the top card while holding the bottom steady, the top card slides relative to the others. In structures, shear force occurs when external loads, like wind or weight, create a sliding tendency between parts, which can lead to deformation or failure if not properly managed. It’s a crucial concept in engineering, ensuring buildings and bridges are designed to withstand these sliding stresses safely.