ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,564, issued on Jan. 13, was assigned to The Boeing Co. (Arlington, Va.).
"Determination of structure fatigue properties" was invented by Joseph D. Schaefer (Richmond Heights, Mo.) and Brian P. Justusson (Saint Peters, Mo.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for determining fatigue properties of a structure includes mounting the structure in a load frame. The structure has a crack with a crack size. The method includes applying repeatedly an adjustable stimulus to the structure over multiple cycles. The adjustable stimulus is an adjustable load or an adjustable displacement applied to the structure. The method further includes sto...