Compressive Buckling Test Method and Equipment for Laser Welded Panel Structures

Abstract

The invention provides a compression buckling test method and equipment for laser-welded panel structures, comprising: constructing a first shell-solid model of a laser-welded panel structure; dividing unit grids on the first shell-solid model, and The elastoplastic parameters of the material are applied to the corresponding cell meshes to obtain the second shell-solid model; the displacement boundary conditions and load application methods are set for the second shell-solid model, the eigenvalue buckling equation is solved, and the eigenvalues ​​and critical values ​​are calculated. Buckling load to obtain the compressive buckling mode; copy the second shell-solid model, input the compressive buckling mode, defect size and residual stress into the second shell-solid model, set the RIKS analysis steps and historical output variables, and solve the nonlinear buckling equation , to obtain the reaction force, strain and displacement data information during the compressive buckling process of the panel structure. The invention can quantitatively study the compression failure load, strain and displacement of the laser welded panel structure.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of panel structural strength, and in particular to a compression buckling test method and equipment for laser-welded panel structures. Background technique [0002] The future development trend of civil aircraft is green, efficient, and fast. Compared with traditional civil aircraft, future civil aircraft will have more stringent requirements for weight reduction and emission reduction. Therefore, lighter aircraft structural materials and more reasonable structural connections are selected. It is particularly important to realize the lightweight of the aircraft in form. It has become a general trend to replace the traditional riveting process with double-sided laser simultaneous welding technology, but this laser welding technology is still in a blank state in related fields, especially for the compressive buckling performance test of the laser simultaneous welded panel structure is bas...

AI Technical Summary

Problems solved by technology

The double-sided laser simultaneous welding technology has become the general trend to replace the traditional riveting process, but this laser welding technology is still in a blank state in related fields, especially for the compressive buckling performance test of the laser simultaneous welding wall plate structure is basically zero

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