Aircraft Operating Life and Durability

                                   Laboratory work №4
                          FATIGUE DURABILITY OF HINGE JOINTS

          Student:           Group:1
          Variant:1

          Initial data for calculation:
          Bolt and eye matirial:     30ХГСА
                                     Sigma_b=120kg/mm^2
                                     Sigma_т=80kg/mm^2
                                     E=21000kg/mm^2
          P =      
          k=Рrep/Р= 
          Loading cycle stress ratio  r=

          Calculation of the joint static strength:
             diameter of the hole in the eye d= mm Accepted d= 14мм
             толщина проушины Delt=44.15мм. Accepted Delt=44мм
             ширина проушины в сечении, ослабленном  болтом В=16.56мм. Accepted B=17мм

                   for k=  
          Fatigue life of a transversely loaded bolt:
          LgNб=      Nб=  
          Fatigue life of the eye, taking into account the bending of the bolt:
          LgNп=      Nп=   

                   for k=  
          Fatigue life of a transversely loaded bolt:
          LgNб=         Nб=    
          Fatigue life of the eye, taking into account the bending of the bolt:
          LgNп=        Nп=      

                   for k=  
          Fatigue life of a transversely loaded bolt:
          LgNб=        Nб=     
          Fatigue life of the eye, taking into account the bending of the bolt:
          LgNп=        Nп=