Study on the Automated Size Optimization and Structural Analysis Program for Composite Lattice Structures

2022 ◽  
Vol 46 (1) ◽  
pp. 77-83
Author(s):  
Hyo-Hun An ◽  
Min-Ho Jung ◽  
Nam-Hun Kim ◽  
Eun-Bi Lee ◽  
Kwang-Bok Shin
Keyword(s):  
Structural Analysis ◽  
Size Optimization ◽  
Lattice Structures ◽  
Analysis Program ◽  
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

Multi-objective design optimization of additively manufactured lattice structures for improved energy absorption performance

2021 ◽  
pp. 095440622199554
Author(s):  
Recep M Gorguluarslan
Keyword(s):  
Energy Absorption ◽  
Response Surfaces ◽  
Optimization Process ◽  
Truss Optimization ◽  
Size Optimization ◽  
Lattice Structures ◽  
Multi Objective ◽  
Lattice Design ◽  
Highly Nonlinear ◽  
Absorption Performance

This paper aims to improve the energy absorption performance of stiffness-optimized lattice structures by utilizing a multi-objective surrogate-based size optimization that considers the additive manufacturing (AM) constraints such as the minimum printable size. A truss optimization is first utilized at the unit cell level under static compressive loads for stiffness maximization and two optimized lattice configurations called the Face-Body Centered Cubic (FBCC) lattice and the Octet Cubic (OC) are obtained. A multi-objective size optimization process is then carried out to improve the energy absorption capabilities of those lattice designs using non-linear compression simulations with Nylon12 material to be fabricated by the Multi Jet Fusion (MJF) AM process. Thin plate spline (TPS) interpolation method is found to produce very high accuracy as the surrogate model to predict the highly nonlinear response surfaces of energy absorption objectives in the optimization. Compared to the lattice designs with uniform strut diameters, by using the optimization process, the maximum energy absorption efficiency ( EAEm) and the crush stress efficiency ( CSE) of the OC lattice design are further improved up to 33% and 37%, respectively. The FBCC lattice design is also found to have superior EAEm performance compared to the existing lattice types considered for fabricating by the MJF process in the literature.

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

Anisogrid composite lattice structures for spacecraft and aircraft applications

2006 ◽  
Vol 76 (1-2) ◽  
pp. 182-189 ◽  
Author(s):  
V.V. Vasiliev ◽  
A.F. Razin
Keyword(s):  
Lattice Structures ◽  
Composite Lattice

Characterization of edge effects of composite lattice structures

2009 ◽  
Vol 69 (11-12) ◽  
pp. 1896-1903 ◽  
Author(s):  
Hualin Fan ◽  
Fennian Jin ◽  
Daining Fang
Keyword(s):  
Edge Effects ◽  
Lattice Structures ◽  
Composite Lattice

Mechanical Behavior of Lattice Structures Fabricated by Direct Light Processing With Compression Testing and Size Optimization of Unit Cells

2019 ◽  
Author(s):  
Marinela Peto ◽  
Erick Ramirez-Cedillo ◽  
Mohammad J. Uddin ◽  
Ciro A. Rodriguez ◽  
Hector R. Siller
Keyword(s):  
Mechanical Behavior ◽  
Stress Shielding ◽  
Unit Cell ◽  
Compression Testing ◽  
Size Optimization ◽  
Hexagonal Prism ◽  
Lattice Structures ◽  
Dog Bone ◽  
Direct Light ◽  
Unit Cells

Abstract Lattice structures used for medical implants offer advantages related to weight reduction, osseointegration, and minimization of stress shielding. This paper intends to study and to compare the mechanical behavior of three different lattice structures: tetrahedral vertex centroid (TVC), hexagonal prism vertex centroid (HPVC), and cubic diamond (CD), that are designed to be incorporated in a shoulder hemiprosthesis. The unit cell configurations were generated using nTopology Element Pro software with a uniform strut thickness of 0.5 mm. Fifteen cuboid samples of 25mm × 25mm × 15 mm, five for each unit cell configuration, were additively manufactured using Direct Light Printing (DLP) technology with a layer height of 50μm and a XY resolution of 73μm. The mechanical behavior of the 3D printed lattice structures was examined by performing mechanical compression testing. E-silicone (methacrylated silicone) was used for the fabrication of samples, and its mechanical properties were obtained from experimental tensile testing of dog-bone samples. A methodology for size optimization of lattice unit cells is provided, and the optimization is achieved using nTopology Element Pro software. The generated results are analyzed, and the HPVC configuration is selected to be incorporated in the further design of prosthesis for bone cancer patients.

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