Analysis of Compressive Mechanics Properties of Body Centered Cubic Lattice with Pillars in Different Reinforcement Directions and Their Filling Structures
To study the compressive mechanics properties of pillar centered cubic lattice with dif-ferent reinforcement directions and their filling structures,silicone rubber filled lattice structure test specimens were prepared herein.The compressive mechanics properties of two lattice structures(BCC1 or BCC2,loading direction was either the same or perpendicular to the direction of pillar rod in body centered cubic lattice with pillars)filled with silicone rubber were studied through experimental and simulation methods.The equivalent elastic modulus and compressive platform stress of two lattice structures were conducted using Timoshenko beam theory and ultimate load method.The results indi-cate that the proposed theoretical model may effectively predict the equivalent elastic modulus and compressive platform stress of two type lattice structures.After filling,the compression strength and energy absorption performance of the two lattice structures are enhanced,while the enhancement effect of the BCC2 structure is more significant.For the BCC1 lattice,rubber filling enhances the bearing capacity of the internal members.However,for the BCC2 lattice structure,rubber filling re-duces the bending deformation of the members near the V-shaped shear band.As the radius of the lattice structure increases,the energy absorption coupling factors of both lattice structures first increase and then decrease,yet the energy absorption coupling factor of BCC1 type structure changes more signifi-cantly.
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