Definition
In aircraft structures and materials, strength is the ability of a material or structural component to resist an applied load without failing. It is typically measured as the maximum stress (force per unit area) the material can withstand before it deforms permanently or breaks. Different types of strength are specified depending on how the load is applied: tensile strength (pulling apart), compressive strength (squeezing), shear strength (sliding layers past each other), and bearing strength (a concentrated load pressing against a surface, as around a bolt hole).
Plain English
How much load a material or part can take before it bends out of shape or breaks. Different kinds of pulling, pushing, or twisting forces are measured separately.
Context Anchor
Seen in aircraft structures, maintenance, inspections, weight-and-balance discussions, and explanations of flight loads.
Derivation
From Old English 'strengthu', meaning the quality of being strong. In engineering, the everyday idea of 'how strong something is' was made precise by tying it to specific kinds of loads and a measurable point of failure.
Why Pilots Care
Ensures critical components like wings and landing gear can withstand flight loads, turbulence, and landings without structural failure.
Analogy
A shelf has strength if it can hold weight without sagging or breaking. An aircraft part is similar: it must hold the forces placed on it without failing.
Intuition Check
Strength does not mean an aircraft part is unbreakable. It means the part can handle a specified amount of force safely, as long as the aircraft is used within its limits.
Example Sentence 1
The repair manual specifies a doubler of sufficient thickness to restore the original tensile strength of the skin.
Example Sentence 2
Technicians inspect the landing gear for any reduction in strength after a hard landing.