Fatigue is the progressive, localized, permanent structural change that occurs in materials subjected to fluctuating stresses and strains that may result in cracks or fracture after a sufficient number of fluctuations. Fatigue fractures are caused by the simultaneous action of cyclic stress, tensile stress and plastic strain. If any one of these three is not present, fatigue cracking will not i...

Purpose: To determine the more effective ankle brace (lace-up or Aircast ankle brace) at providing dynamic postural control in volleyball players with unstable ankle under functional fatigue conditions. Methods: Subjects of this study participated in 3 separate testing sessions and did not use or used a different brace at each session i.e. no brace (NB), lace-up ankle brace (AB), and Airca...

abstract – aluminium 7075- t651 alloys are widely used in the production of light weight structures requiring a high strength to weight ratio and high corrosion resistance. the effect of processing parameters on fatigue life of 7075- t651 aluminium joints produced by friction stir welding was investigated in the present study. welding samples were made by employing rotating tool speed of 770, 9...