Investigation of the stress-strain state and stability of solid and mesh adapters

The aim of the study is to compare the stress fields and stability of adapters of various configurations made of aluminum Al – 2024 and composite M46. The adapters have a constant mass. The solid and mesh adapters were reinforced with rigid frames along the edges of the structures, the lower edges were fixed with rigid sealing. Parametric discrete models were modeled using the ANSYS finite element software package. A two-node beam end element with six degrees of freedom BEAM4 was used for the mesh adapter. A four-node, six-degree-of-freedom terminal element SHELL181 was inserted into the solid adapter. The load on the structure was transferred using topological connections with an imaginary node located in the center of the upper frame. Topological connections were modeled by a rigid MPC 184 element. An axial compressive load of 108 t.s. was applied to the imaginary node. Analysis of the stress-strain state of the continuous adapters showed that the adapter made of carbon fiber holds the load better than aluminum. The values of the critical load of the stability loss of the aluminum adapter are less than the values of the critical load of the carbon fiber adapter. The analysis of stress and displacement fields has shown that in the mesh adapter, the spiral fins work for compression, and the annular fins work for tension. A comparison of the stress fields of the mesh and solid adapters, as well as the values of critical loads, allows us to conclude that it is more efficient to use a mesh structure in the product.