Journal of the American Medical Association · 1940 · 65 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceMechanical Behavior Of MaterialsMetallic MaterialsMetallurgyAlloysCrystallization ProcessesFailure CriteriaFatigueFracture MechanicsMetalsFatigue DamageFatigue Due To VibrationFatigue FailureFatigue Failure AnalysisFatigue Failure CriteriaFatigue Failure TheoryMetal FatigueMetal Fatigue Behavior
<h3>To the Editor:—</h3> My attention has been called to a medicolegal abstract ("Malpractice: Liability for Injury to Patient from Nurse's Operation of Fluoroscope") inThe Journal, September 28. The National Bureau of Standards letter circular LC486, "Metals Do Not 'Crystallize' Under Vibration," has been prepared to answer the many inquiries we receive on this subject. Members of the staff of the National Bureau of Standards are called on to examine many instances of fatigue failure in all sorts of structures. It is our experience that one fatigue failure in a certain part in a given structure which has been in use for a considerable time is all too likely to be followed by a number of like failures in the same part in other structures of the same kind which have given as long or longer similar service. This likelihood is so great that it is frequently thought advisable in