Panel member evaluation method, panel member evaluation apparatus, and manufacturing method of panel member for automobiles
An evaluation method and technology of evaluation devices, which are applied in the testing of machine/structural components, measuring devices, vehicle components, etc., can solve the problems of unpredictable tensile stiffness, unpredictable characteristic line stiffness, unpredictable buckling load, etc.
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Embodiment approach 1
[0084] figure 2 It is a figure which shows an example of the door panel for automobiles to which the panel member evaluation method of Embodiment 1 of this invention was applied. figure 2 The illustrated panel part 1 for a motor vehicle has a characteristic line 2 and embosses for handles 3 . The characteristic line 2 is formed by two convex surfaces 4 , 11 .
[0085] image 3 yes means figure 2 A diagram of the finite element analysis model of the automotive panel component shown, Figure 4 yes means image 3 The A-A' section diagram of Figure 5 It is a graph showing a load-displacement curve when a cylinder type penetrator is pressed against a characteristic line.
[0086] also, Figure 4 The A-A' section of A-A' can be, for example, a section perpendicular to the direction in which the characteristic line extends. However, even in the case of a cross section that is not perpendicular to the direction in which the characteristic line extends, the buckling load an...
Embodiment approach 2
[0117] Figure 17 It is a figure which shows an example of the door panel for automobiles to which the panel member evaluation method of Embodiment 2 of this invention was applied. Figure 17 The illustrated panel member 1 for an automobile has a characteristic line 2 formed of a convex curved surface 4 and a concave curved surface 5 and a handle protrusion 3 .
[0118] In the board member evaluation method according to Embodiment 2 of the present invention, as Figure 17 As shown in FIG. 2 , a component whose characteristic line 2 is composed of a convex curved surface 4 and a concave curved surface 5 is taken as an object.
[0119] Same as Embodiment 1, created image 3 The finite element analysis model as shown.
[0120] In Embodiment 2, make Figure 18 The radius of curvature R1 of the convex curved surface 4 and the radius of curvature R2 of the concave curved surface 5 are changed in the range of 500 mm to 3000 mm, so that Figure 18 The opening angle θ of the shown...
Embodiment 1
[0148] According to Embodiment 1 of the present invention, the panel member can be reduced in weight by efficiently disposing the characteristic lines on the panel member.
[0149] As an example of panel parts for automobiles, such as Figure 10 as well as Figure 11 A door panel with a panel thickness of 0.70 mm is shown. As a material of the door panel, a steel plate with a tensile strength of 340 MPa class (elastic modulus: 210 GPa, yield strength: 235 MPa, tensile strength: 345 MPa, total elongation: 40%) was used. pass Figure 12 The method indicated for the determination of Figure 10 as well as Figure 11 The tensile stiffness of the door panel 60 is shown. That is, point A on the door panel 60 (refer to Figure 11 ) pressed the cylindrical rubber indenter 7 with a diameter of 45 mm, and measured the displacement of point A at this time with the displacement meter 8 . Furthermore, the tensile stiffness when the displacement of the point A was 0.5 mm was measured ...
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Abstract
Description
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