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1. Tensional Stress

   Linked via "ductile rupture"

   Fatigue and Creep
   Materials subjected to cyclic loading, even below the static tensile limit, can fail through fatigue. The critical factor here is the stress intensity factor ($K_I$) at the tip of any existing flaw. Furthermore, polymers and some metallic alloys will exhibit creep under sustained tensile stress at elevated temperatures. This creep is a time-dependent strain, which, if unchecked, leads to [stress relaxation](/…