Failure analysis of 1D lattice truss composite structure in uniaxial compression

Sui, Qianqian; Fan, Hualin; Lai, Changliang

doi:10.1016/j.compscitech.2015.09.003

Cited by 39 publications

(18 citation statements)

References 16 publications

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“…The scope of this initial strength testing is admittedly limited, but it provides a useful benchmarking point for the direct stiffness method, as will be seen. A much more thorough treatment of failure modes in composite truss structures is given in [8]. In this case, the torsional loading was primarily being carried by the shear web, as would be expected, and the portions of the shear web under compression are the likely points of failure initiation as they are prone to buckling.…”

Section: Torsional Strength Testingmentioning

confidence: 99%

“…These supports must be able to translate along the length of the truss as it is wound, and must remain there until the polymer matrix bonding the tows together is fully cured. Other work by the same research group and others has used internal mandrels to make the same basic structure, [6][7][8] and have considered winding based methodologies instead of braiding, but in this case the non-continuous cross section, visible in Figure 2, and the need to support the material at each node creates captive mandrel geometries, which requires the use of complex multi-component mandrel solutions that can be disassembled, collapsed, or dissolved for removal after the composite has cured. Other researchers have considered modified forms of braided truss structures that greatly simplify the geometry, but they do so using a circular cross section mandrel which creates curved segments.…”

Section: Introductionmentioning

confidence: 99%

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Ultra-efficient wound composite truss structures

Woods

Ioan

Friswell

2016

Composites Part A: Applied Science and Manufacturing

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/pure/about/ebr-terms AbstractThis paper presents the design, analysis, manufacturing, experimental testing, and multiobjective optimization of a new family of ultra-efficient composite truss structures. The continuously wound truss concept introduced here is a versatile, low cost and scalable method of manufacturing truss structures based on a simple winding process. A prototype truss configuration is shown and experimentally characterized under torsion and three point bending loads.A large deformation implementation of the direct stiffness method is shown to provide good prediction of the stiffness properties of the prototype truss. This model is extended to include strength prediction with multiple failure modes. The design space achievable with these truss structures is then explored through multiobjective optimization using the NSGA II genetic algorithm. These continuously wound truss structures have the potential to provide between one and two orders of magnitude increase in structural efficiency compared to existing carbon fiber composite tubes.

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Section: Torsional Strength Testingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultra-efficient wound composite truss structures

Woods

Ioan

Friswell

2016

Composites Part A: Applied Science and Manufacturing

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“…Consequently, it is necessary to determine the optimal parameters of lattice structure for a specific application [28,29]. Qianqian et al [30] developed theoretical and finite element methods for analyzing one-dimensional lattice truss composite structures under uniaxial compression and found that the buckling modes significantly depend upon the length of the column. Magnucki et al [31] derived an analytical solution for investigating critical buckling load of a unidirectional isotropic beam made of porous material.…”

Section: Introductionmentioning

confidence: 99%

Buckling and Post-Buckling Behavior of Uniform and Variable-Density Lattice Columns Fabricated Using Additive Manufacturing

2019

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Lattice structures are known for their high strength-to-weight ratio, multiple functionalities, lightweight, stiffness, and energy absorption capabilities and potential applications in aerospace, automobile, and biomedical industry. To reveal the buckling (global and local) and post-buckling behavior of different lattice morphologies, both experimental and simulation-based studies were carried out. Additionally, a variable-density lattice structure was designed and analyzed to achieve the optimal value of critical buckling load. Latticed columns were fabricated using polyamide 12 material on multi jet fusion 3D printer. The results exhibited that the buckling in lattice columns depends on the distribution of mass, second moment of inertia I, diameter and position of vertical beams, number of horizontal or inclined beams, and location and angle of the beams that support the vertical beams. The number of horizontal and inclined beams and their thickness has an inverse relation with buckling; however, this trend changes after approaching a critical point. It is revealed that vertical beams are more crucial for buckling case, when compared with horizontal or inclined beams; however, material distribution in inclined or horizontal orientation is also critical because they provide support to vertical beams to behave as a single body to bear the buckling load. The results also revealed that the critical buckling load could be increased by designing variable density cellular columns in which the beams at the outer edges of the column are thicker compared with inner beams. However, post-buckling behavior of variable density structures is brittle and local when compared with uniform density lattice structures.

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“…Lattice truss composite structures (LTCSs) are known for their high specific stiffness and strength 1,2 and potential applications in aeronautic and astronautic structures. LTCSs can be divided into the one-dimensional (1D) LTCS, [3][4][5] two-dimensional (2D) LTCS, [6][7][8][9][10][11][12] and three-dimensional (3D) LTCS. 1,2 Among them, 2D LTCSs have been well developed in last two decades.…”

Section: Introductionmentioning

confidence: 99%

Buckling failure modes of one-dimensional lattice truss composite structures

Sui

Lai

Fan

2017

Proceedings of the Institution of Mechanical Engineers, Part G:

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To reveal compression buckling, flexural buckling and torsional buckling of one-dimensional lattice truss composite columns, parameterized finite element modelling and theoretical analyses were carried out. Global and local buckling modes of six-node lattice truss composite columns in compression were revealed by finite element modelling. The buckling styles and the critical buckling forces depend on the column length, the constraints, and the bay length. For flexural and torsional lattice truss composite columns, local buckling is the dominant failure mode. The flexural or torsional buckling moment is related to the bay length and independent of the column length. The moment decreases when the bay length gets longer. Including all these factors, theoretical models were proposed based on equivalent column theory. These models correctly predict the buckling force or moment. Imperfection analyses indicate that the lattice truss column is sensitive to imperfections when the column fails at local buckling and non-sensitive at global buckling.

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Failure analysis of 1D lattice truss composite structure in uniaxial compression

Cited by 39 publications

References 16 publications

Ultra-efficient wound composite truss structures

Ultra-efficient wound composite truss structures

Buckling and Post-Buckling Behavior of Uniform and Variable-Density Lattice Columns Fabricated Using Additive Manufacturing

Buckling failure modes of one-dimensional lattice truss composite structures

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