Abstract: Titanium aluminum, non-frangible structural wire, when assembled into axially symmetric and contrahelically wrapped cable has high fatigue strength and loading linearity for uniquely high work efficiency. Dynamic stresses are moderated by more suitable mechanical, physical and dynamic properties so that stress and fatigue control are passively achieved. Structural wire is specially processed from selected titanium base alloys having high drop test tear energy, wherein new construction designs and specifications are then suitable and used during cable assembly to substantially advance work performance and increase service life.Work characteristics are basically improved and changed by (1) adding elastic and constructional stretch, (2) materially reducing mass density, and (3) loading cable with hard and soft spring. These cable attributes translate into much higher fatigue strength, mainly by absorbing, storing and dissipating induced work loads at rapid rates.

Abstract: A synthesis of four (4) factors is applied, through a test approach, to eliminate wire fractures, and fractures and overstressing of other cable components. This approach shows this "crucial flaw" is prevented from occurring amidst other flaws within the "flaw state" of the complex structure of work performing cable. These other flaws prove to be minor during the cable's service life.Non-frangible, ductile aluminum (al) and titanium (ti) wire are used in the cable assembly wherein their high dynamic properties and other attributes prevent wire fractures, and neutralize or reduce wire wear, depending upon load level, to change and improve the cable's "flaw state" so that a "fail-safe" cable may be designed to provide a protracted service life.Steel and copper wire fail to qualify for "fail-safe" cable constructions due to their low dynamic properties and other flaws in the cable structure.