Mingkun Du’s scientific contributions

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Publications (2)


Numerical and experimental evaluations on the defect sensitivity of the performance of BCC truss-lattice structures
  • Article

February 2024

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47 Reads

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4 Citations

Mechanics of Materials

Zhenyang Huang

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Hu Niu

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Mingkun Du

Additive manufacturing (AM) routes have brought abundant geometric defects into as-fabricated lattice materials. Researchers take it for granted that any defects in lattice struts would decrease the mechanical properties of lattice structures, which has also been a rule followed by all engineering designers. In this paper, novel design strategies of actively utilizing defects to improve the mechanical properties of BCC lattice structures are proposed. Firstly, effects of non-periodic microstructure, waving struts and missing struts on the mechanical properties (i.e. compressive modulus and initial yield strength) of BCC lattice structures are investigated through finite element analysis. Simulation results indicate that mechanical properties of the BCC lattice structures exhibited certain sensitivity to the defects. Then, strategies to enhance the performance of BCC lattice patterns by utilizing the imperfections actively are also proposed. Finally, some typical lattice specimens are fabricated and experimental tests are also conducted to validate the accuracy of design strategies. We believe that the proposed new strategy could markedly expand the design space for the development of future materials by actively utilizing the geometric defects.


Citations (2)


... 13 Lattice structures can be divided into two main categories according to their structural configuration characteristics: (i) 2D lattice structures including honeycomb structures, [14][15][16][17] auxetic structures, [18][19][20] and hierarchical 2D lattice structures 21,22 ; and (ii) 3D lattice structures including truss-based, [23][24][25][26] plate-based, 27,28 shell-based, [29][30][31] and hierarchical 3D structures. 32,33 Truss-based 3D lattice structures include solid and hollow truss, and their cell shapes mainly comprise simple cubic, 34,35 body-centered cubic, 24,[36][37][38] face-centered cubic, 34,39 edge centered cubic, 40 octagonal truss, 23,41 octahedron, 42 double pyramid dodecahedron, 43 rhombic dodecahedron, 44 tetrakaidecahedron, 25 diamond, 36 Kagome, 45 circle, 46 and re-entrant cube. 47 Lattice structures can be categorized based on whether they exhibit bending or stretch-dominated mechanical behavior. ...

Reference:

On the mechanical behavior of polymeric lattice structures fabricated by stereolithography 3D printing
Numerical and experimental evaluations on the defect sensitivity of the performance of BCC truss-lattice structures
  • Citing Article
  • February 2024

Mechanics of Materials

... The most common design method of improving mechanical performance of LS is to combine different sub-structures [12][13][14]. Tancogne-Dejean et al. [15] combined body-centered cubic (BCC), simple cubic (SC), and face-centered cubic (FCC) in different ratios to form isotropic plate-lattices that feature the high stiffness, superior yield strength, and excellent energy-absorption. Furthermore, this isotropic plate-lattices depicted 70 % increase in toughness than the conventional lattices [16]. ...

Response of Topological Soliton lattice structures subjected to dynamic compression and blast loading
  • Citing Article
  • July 2023

Thin-Walled Structures