Estimation of the Lifetime of Bonded Joints under Cyclic Loads at Different Temperatures

摘要: The fatigue lifetime of joints bonded with a toughened epoxy adhesive has been estimated using the stress-life method, based on experimental SN curves. Five temperatures (35°C, −10°C, RT, +50°C, +80°C) were considered. estimations performed direct approach, for having near-homogeneous stress distributions (scarf joints), and; an optimised inhomogeneous (single lap joints). calculated considering linear-elastic material behaviour analytical methods and finite element analysis. For effective was defined in terms theory critical distances. calculations considering: (i) uniaxial stress, evaluating maximum principal (ii) multiaxial influence relationship between hydrostatic deviatoric stresses. validated experiments under tension–tension load...