A concentrated point of stress in a material is known as what?

A concentrated point of stress in a material is referred to as a stress riser. This term is used to describe locations in a structure where stress concentration occurs due to geometric discontinuities like notches, holes, or sharp corners. These alterations in the geometry can result in localized increases in stress, which may lead to failure or fatigue in the material.

Understanding that stress risers can significantly impact the structural integrity of an aircraft is crucial for engineers and technicians. This knowledge helps in designing components that minimize potential failure points and in conducting proper inspections and repairs on existing structures. Each of the other terms listed does not accurately encapsulate this specific phenomenon. For example, "stress concentrator" might imply similar concepts but is not the precise terminology used in engineering practices. Meanwhile, "stress mitigator" and "stress point" do not specifically indicate the localized increase in stress due to geometrical features.