Issue 41

F. Berto et alii, Frattura ed Integrità Strutturale, 41 (2017) 260-268; DOI: 10.3221/IGF-ESIS.41.35 266 R 0 =0.28mm,  =0 mm t=1mm FE W (  10 3 ) W HOT (  10 3 )  *T,K,K II I W (  10 3 )  (MJ/m 3 ) (MJ/m 3 ) (%) (MJ/m 3 ) (%) d/t=0.5 1.412 1.453 2.9 1.765 25.0 1 1.208 1.214 0.5 1.509 25.0 3 1.181 1.193 1.0 1.443 22.2 Table 2 . Mean values of the strain energy density over the control volumes for welded lap joints, with F/(t  1)=10 MPa; values based on T* determined on the ligament, close to the point of singularity, r  0.03 mm Figure 2 : Stress field along the ligament line for the case d/t=1 and t=1 mm. Figure 3 : Stress field along the direction  =90° for the case d/t=1. 0 1 10 100 1000 0.001 0.010 0.100 1.000 r [mm] t=1mm d/t=1  = 0° and 180° Stress components [MPa]   (  = 0°)  rr (  = 0°)  r  (  = 0°) FE results  rr (  = 180°) Theoretical solution considering the parameters a 1 ,…, a 7 Theoretical solution considering the parameters K I , K II and T-stress 1 10 100 1000 0.001 0.010 0.100 1.000 r [mm] Stress components [MPa]    rr  r  t=1mm d/t=1  = +90° Theoretical solution considering the parameters a 1 ,…, a 7 Theoretical solution considering the parameters K I , K II and T-stress FE results range of valitidy of K I , K II , T-stress based solution