CAE-Companion-2018-2019

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Modeling of Materials & Connections WISSEN CAE

shown in straight lines and reproduce the measured load bearing capacities quite well. The determined parameters are shown in Table 2 and are specific for the investigated DP600 spot weld with nugget diameter of 5.4 mm and quasi-static loading.

Figure 2: finite element models of spot welded specimens: tension, peel and lap-shear specimen (from left to right)

step procedure

result

1 determination of critical normal force by simulation of tension test 2 determination of critical bending moment by simulation of peel test with fixed value of FN 3 determination of critical shear force by simulation of lap-shear test with fixed value of FN andMB

F N

M B

Figure 3: Comparison of the measured and calculated load vs. displacement curves of lap-shear, tension and peel tests using solid elements and MAT_100 in LS-Dyna

F S

F N

M B

F S

Table 1: stepwise determination of failure parameters

11.1 kN 15.4 kN Table 2: failure parameters for spot welded joints in DP600 with a nugget diameter of 5.4 mm and quasi-static loading 15.7 Nm

Results of parameter determination The result of the determination of parameters is shown in Figure 3. The dashed lines are the measured load vs. displace- ment curves of the three specimen tests used for parameter calibration. The calculated load vs. displacement curves are