Definition
The maximum compressive (squeezing) load a material can withstand before it fails by crushing, buckling, or permanent deformation. In aircraft structures, it is one of the key measures used to compare materials and to design parts that carry pushing loads.
Plain English
How much squeezing force a material can take before it crushes or gives way.
Context Anchor
Seen in discussions of aircraft materials, especially composite structures that must handle loads in different directions.
Derivation
From Latin 'comprimere,' meaning 'to press together.' So compressive strength literally describes how well a material resists being pressed together.
Why Pilots Care
Composite parts must withstand repeated compressive loads from flight maneuvers, landings, and pressurization without buckling or cracking.
Analogy
A cardboard box may hold weight well until one corner is crushed. After that, it may no longer handle the same squeezing load even if it still looks like a box.
Intuition Check
Compressive strength is not general “toughness.” It specifically means strength against pushing or squeezing loads, not pulling or bending loads.
Example Sentence 1
Carbon fiber composites offer high compressive strength at a fraction of the weight of aluminum.
Example Sentence 2
Engineers selected a core material with high compressive strength to prevent the sandwich structure from collapsing under flight loads.