Mathematical Problems in Engineering Joint Structure Stiffness Analysis of an Automotive Body in White with the Finite Element Method

Table 6

Ratio of stiffness between unrigid and rigid joints of sub-branch 2 of pillar B.

B pillar lower joint	Front and back bending stiffness (N·mm/rad)	Internal and external bending stiffness (N·mm/rad)	Torsional rigidity (N·mm/rad)
Unrigid joint	4.808E + 08	1.731E + 08	8.143E + 08
Rigid joint	9.311E + 08	4.963E + 08	1.852E + 08