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Experimental and numerical investigation on pre-stressed lattice structures
Abstract The effect of pre-stress on the buckling behaviour of geometric unit cells of collinear square lattices is investigated experimentally and numerically. The geometric unit cells are manufactured using fused deposition modelling. Manufacturing strategies are presented which incorporate fibres subjected to pre-stress within the unit cell. The effect of pre-stressed fibres is analysed by comparing the compressive behaviour of unit cells with and without fibre reinforcement. The buckling behaviour of the unit cells is also investigated numerically by employing a parametric study within Abaqus varying the pre-stress in the fibres. The experimental test series shows that the addition of pre-stressed fibres to the system results in an increase in buckling and maximum load of 260%–480% and 220%–350% respectively. The increase strongly relates to the manufacturing quality, i.e. the bonding between the lattice material and the fibres, where a sufficient bonding yields significantly larger loads. The experimental findings on the qualitative and quantitative buckling behaviour correspond well with results obtain from the numerical study.
Highlights New concept of introducing pre-stress in lattice structures by using carbon fibres and additive manufacturing. Experimental load vs. displacement curves for geometric unit cells. Comprehensive numerical analysis of the buckling behaviour studying the effect of pre-stress. Analysis of the buckling behaviour in comparison with large-scale civil engineering prestressed stayed columns.
Experimental and numerical investigation on pre-stressed lattice structures
Abstract The effect of pre-stress on the buckling behaviour of geometric unit cells of collinear square lattices is investigated experimentally and numerically. The geometric unit cells are manufactured using fused deposition modelling. Manufacturing strategies are presented which incorporate fibres subjected to pre-stress within the unit cell. The effect of pre-stressed fibres is analysed by comparing the compressive behaviour of unit cells with and without fibre reinforcement. The buckling behaviour of the unit cells is also investigated numerically by employing a parametric study within Abaqus varying the pre-stress in the fibres. The experimental test series shows that the addition of pre-stressed fibres to the system results in an increase in buckling and maximum load of 260%–480% and 220%–350% respectively. The increase strongly relates to the manufacturing quality, i.e. the bonding between the lattice material and the fibres, where a sufficient bonding yields significantly larger loads. The experimental findings on the qualitative and quantitative buckling behaviour correspond well with results obtain from the numerical study.
Highlights New concept of introducing pre-stress in lattice structures by using carbon fibres and additive manufacturing. Experimental load vs. displacement curves for geometric unit cells. Comprehensive numerical analysis of the buckling behaviour studying the effect of pre-stress. Analysis of the buckling behaviour in comparison with large-scale civil engineering prestressed stayed columns.
Experimental and numerical investigation on pre-stressed lattice structures
Köllner, Anton (author) / Todt, Melanie (author) / Ganzosch, Gregor (author) / Völlmecke, Christina (author)
Thin-Walled Structures ; 145
2019-09-10
Article (Journal)
Electronic Resource
English
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