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4. Resilience testing
4.1 Metal brittleness
Knowledge of the mechanical properties deduced from the tensile test may be insufficient, since fractures may be obtained below the elastic limit under particular conditions that render the metal brittle.
Weakening factors include :
triaxiality of stresses: when a part is subjected to compressive stresses in three mutually perpendicular directions, a crack may propagate in the most brittle direction of the part; this triaxiality can be artificially induced by the presence of a notch or a stress concentration zone;
lowering the temperature: at very low temperatures, the ductility of the metal decreases considerably, which can lead to brittle fracture;
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Resilience testing
Fatigue tests
Bibliography
Standards and norms
NF EN 1090, which defines the requirements for the manufacture, inspection and certification of steel and aluminum products used in construction.
NF EN ISO 6892-1, which describes the method for tensile tests on metals.
NF EN ISO 6506-1, which describes the Brinell hardness test method for metallic materials.
NF EN ISO 6507-1, which describes...
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