Failure analysis of 3D printed glass fiber/PA12 composite lattice structures using DIC

2019 ◽  
Vol 225 ◽  
pp. 111192 ◽  
Author(s):  
Wenfeng Hao ◽  
Ye Liu ◽  
Tao Wang ◽  
Guangping Guo ◽  
Haosen Chen ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Glass Fiber ◽  
Lattice Structures ◽  
3D Printed ◽  
Composite Lattice

Scalable fiber composite lattice structures via continuous spatial weaving

2021 ◽  
Vol 262 ◽  
pp. 113651
Author(s):  
Guangtao Zhai ◽  
Jiarui Zhang
Keyword(s):  
Fiber Composite ◽  
Lattice Structures ◽  
Composite Lattice

scholarly journals EXPERIMENTAL INVESTIGATION AND SIMULATION OF 3D-PRINTED LATTICE STRUCTURES

2019 ◽  
Vol 25 ◽  
pp. 52-57
Author(s):  
Eva Heiml ◽  
Anna Kalteis ◽  
Zoltan Major
Keyword(s):  
Mechanical Performance ◽  
Bulk Material ◽  
Deformation Behaviour ◽  
Lightweight Design ◽  
Thermoplastic Polyurethane ◽  
Selective Laser Sintering ◽  
Structural Performance ◽  
Lattice Structures ◽  
3D Printed ◽  
Manufacturing Techniques

Lattice structures are currently of high interest, especially for lightweight design. They generally have better structural performance per weight than parts made of bulk material. With conventional manufacturing techniques they are difficult to produce, but with additive manufacturing (AM) fabricationisfeasible. To better understand their behaviour under various loading conditions two lattice structures in different configurations were observed. For each structure three different test specimens were designed and manufactured using selective laser sintering (SLS). To investigate the mechanical performance under large deformations the specimens were made of a thermoplastic polyurethane(TPU), which shows a hyperelastic material behaviour. Beside the experimental observations also finite element analyses (FEA) were conducted to investigate the deformation behaviour in more detail.

scholarly journals Design of Shape Reconfigurable, Highly Stretchable Honeycomb Lattice With Tunable Poisson’s Ratio

2021 ◽  
Vol 8 ◽  
Author(s):  
Le Dong ◽  
Chengru Jiang ◽  
Jinqiang Wang ◽  
Dong Wang
Keyword(s):  
Theoretical Model ◽  
Ambient Temperature ◽  
Shape Memory ◽  
Poisson’S Ratio ◽  
Lattice Structure ◽  
Poisson's Ratio ◽  
Lattice Structures ◽  
Straight Beam ◽  
Highly Stretchable ◽  
3D Printed

The mechanical behaviors of lattice structures can be tuned by arranging or adjusting their geometric parameters. Once fabricated, the lattice’s mechanical behavior is generally fixed and cannot adapt to environmental change. In this paper, we developed a shape reconfigurable, highly stretchable lattice structure with tunable Poisson’s ratio. The lattice is built based on a hexagonal honeycomb structure. By replacing the straight beam with curled microstructure, the stretchability of the lattice is significantly improved. The Poisson’s ratio is adjusted using a geometric angle. The lattice is 3D printed using a shape memory polymer. Using its shape memory effect, the lattice demonstrates tunable shape reconfigurability as the ambient temperature changes. To capture its high stretchability, tunable Poisson’s ratio and shape reconfigurability, a phase evolution model for lattice structure is used. In the theoretical model, the effects of temperature on the material’s nonlinearity and geometric nonlinearity due to the lattice structure are assumed to be decoupled. The theoretical shape change agrees well with the Finite element results, while the theoretical model significantly reduces the computational cost. Numerical results show that the geometrical parameters and the ambient temperature can be manipulated to transform the lattice into target shapes with varying Poisson’s ratios. This work provides a design method for the 3D printed lattice structures and has potential applications in flexible electronics, soft robotics, and biomedicine.

Localization of Deformation in Lattice Structures of 3D-Printed Samples of 03X17H14M2 Steel

2020 ◽  
Vol 46 (7) ◽  
pp. 683-686
Author(s):  
D. G. Firsov ◽  
S. D. Konev ◽  
O. N. Dubinin ◽  
S. A. Evlashin ◽  
I. V. Shishkovsky
Keyword(s):  
Lattice Structures ◽  
Localization Of Deformation ◽  
3D Printed
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