| 초록 |
Dent resistance is an important factor to meet the demand for automotive outer body panel. It is determined by both effects of test location, i.e., geometries of panel, shapes and boundary condition, and sheet thickness, yield strength. The quasi static denting test of the procedure simulates loading condition that occur at low indenter velocities such as palm-printing, elbow marks, plant handling. The dynamic denting test of the procedure simulates loading conditions that occur at higher indenter velocities, such as hail impact, shopping carts, and door-to-door parking lot impact. So, dynamic dent testing is of interest because it more closely approximates real life denting conditions. In this study, the comparison in dent resistance properties between bake hardenable steels and 490MPa grade dual phase steels is made under both quasi static and dynamic denting conditions. |
