C2 — Materials Science

compressive strength ||| The maximum stress a material can withstand under a compressive (squeezing) load before failure. Measured in MPa or psi. For concrete, denoted f'c or fck. Example: "The specified compressive strength of this concrete mix is 30 MPa."

acier

steel
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steel ||| A structural metal alloy of iron and carbon, combining high tensile and compressive strength. Used for beams, columns, reinforcement bars (rebar), and connections. Key properties: yield strength (fy), ultimate strength (fu), and ductility.

ductilité

ductility
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ductility ||| The ability of a material to undergo significant plastic deformation before fracturing. Critical in seismic design — ductile structures absorb energy without sudden collapse. Steel is highly ductile; unreinforced concrete is brittle.

module d'élasticité

modulus of elasticity
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modulus of elasticity ||| Also called Young's Modulus (E). The ratio of stress to strain in the elastic range — a measure of material stiffness. Measured in GPa or ksi. Steel: E ≈ 200 GPa. Concrete: E varies with compressive strength.