text: FATIGUE STRENGTH OF TYPICAL AIRCRAFT METAL 
  
  HIGH CYCLIC STRESS 
  VERY FEW CYCLES REQUIRED 
  TO CAUSE FAILURE 
  
  MODERATE CYCLIC STRESS 
  
  RELATIVELY 
  APPLICATIONS NECESSARY TO 
  CAUSE FAILURE 
  
  LARGE NUMBER OF 
  
  LOW CYCLIC STRESS 
  
  ALMOST INFINITE CYCLES 
  TO CREATE FATIGUE FAILURE 