Concurrent topology optimization design of stiffener layout and cross-section for thin-walled structures

2021 ◽  
Author(s):  
Quhao Li ◽  
Yongxin Qu ◽  
Yunfeng Luo ◽  
Shutian Liu
Keyword(s):  
Topology Optimization ◽  
Cross Section ◽  
Optimization Design ◽  
Concurrent Topology Optimization ◽  
Thin Walled Structures ◽  
Stiffener Layout ◽  
Thin Walled

Numerical Investigation of Cross-Section on Aluminum A6063 Thin-Walled Structures under Low-Velocity Impact Loading

2014 ◽  
Vol 1019 ◽  
pp. 96-102
Author(s):  
Ali Taherkhani ◽  
Ali Alavi Nia
Keyword(s):  
Energy Absorption ◽  
Cross Section ◽  
Cross Sections ◽  
Peak Load ◽  
Circular Cross Section ◽  
Absorption Capacity ◽  
Energy Absorption Capacity ◽  
Thin Walled Structures ◽  
Thin Walled ◽  
Crush Strength

In this study, the energy absorption capacity and crush strength of cylindrical thin-walled structures is investigated using nonlinear Finite Elements code LS-DYNA. For the thin-walled structure, Aluminum A6063 is used and its behaviour is modeled using power-law equation. In order to better investigate the performance of tubes, the simulation was also carried out on structures with other types of cross-sections such as triangle, square, rectangle, and hexagonal, and their results, namely, energy absorption, crush strength, peak load, and the displacement at the end of tubes was compared to each other. It was seen that the circular cross-section has the highest energy absorption capacity and crush strength, while they are the lowest for the triangular cross-section. It was concluded that increasing the number of sides increases the energy absorption capacity and the crush strength. On the other hand, by comparing the results between the square and rectangular cross-sections, it can be found out that eliminating the symmetry of the cross-section decreases the energy absorption capacity and the crush strength. The crush behaviour of the structure was also studied by changing the mass and the velocity of the striker, simultaneously while its total kinetic energy is kept constant. It was seen that the energy absorption of the structure is more sensitive to the striker velocity than its mass.

Concurrent topology optimization design of structures and non-uniform parameterized lattice microstructures

2018 ◽  
Vol 58 (1) ◽  
pp. 35-50 ◽  
Author(s):  
Chuang Wang ◽  
Ji Hong Zhu ◽  
Wei Hong Zhang ◽  
Shao Ying Li ◽  
Jie Kong
Keyword(s):  
Topology Optimization ◽  
Optimization Design ◽  
Concurrent Topology Optimization

Discrete Optimization Design of Tailor-Welded Blanks (TWBs) Thin-Walled Structures Under Dynamic Crashing

2019 ◽  
Vol 20 (2) ◽  
pp. 265-275
Author(s):  
Yisong Chen ◽  
Fengxiang Xu ◽  
Suo Zhang ◽  
Kunying Wu ◽  
Zhinan Dong
Keyword(s):  
Discrete Optimization ◽  
Optimization Design ◽  
Tailor Welded Blanks ◽  
Thin Walled Structures ◽  
Thin Walled

Crashworthiness optimization design for foam-filled multi-cell thin-walled structures

2014 ◽  
Vol 75 ◽  
pp. 8-17 ◽  
Author(s):  
Hanfeng Yin ◽  
Guilin Wen ◽  
Zhibo Liu ◽  
Qixiang Qing
Keyword(s):  
Optimization Design ◽  
Crashworthiness Optimization ◽  
Thin Walled Structures ◽  
Foam Filled ◽  
Thin Walled

scholarly journals Primary Response Assessment Method for Concept Design of Monotonous Thin-Walled Structures

10.14311/750 ◽  
2005 ◽  
Vol 45 (4) ◽  
Author(s):  
V. Zanic ◽  
P. Prebeg
Keyword(s):  
Cross Section ◽  
Response Assessment ◽  
Assessment Method ◽  
Primary Response ◽  
Concept Design ◽  
Fem Model ◽  
Feasibility Assessment ◽  
Thin Walled Structures ◽  
Thin Walled ◽  
The Cross

A concept design methodology for monotonous, tapered thin-walled structures (wing/fuselage/ship/bridge) is presented including modules for: model generation; loads; primary (longitudinal) and secondary (transverse) strength calculations; structural feasibility (buckling/fatigue/ultimate strength criteria); design optimization modules based on ES/GA/FFE; graphics. A method for primary strength calculation is presented in detail. It provides the dominant response field for design feasibility assessment. Bending and torsion of the structure are modelled with the accuracy required for concept design. A ‘2.5D-FEM’ model is developed by coupling a 1D-FEM model along the ‘monotonity’ axis and a 2D-FEM model(s) transverse to it. The shear flow and stiffness characteristics of the cross-section for bending and pure/restrained torsion are given, based upon the warping field of the cross-section. Examples: aircraft wing and ship hull. 

Topology optimization for crashworthiness of thin-walled structures under axial impact using hybrid cellular automata

2016 ◽  
Vol 54 (3) ◽  
pp. 415-428 ◽  
Author(s):  
Fabian Duddeck ◽  
Stephan Hunkeler ◽  
Pablo Lozano ◽  
Erich Wehrle ◽  
Duo Zeng
Keyword(s):  
Topology Optimization ◽  
Cellular Automata ◽  
Axial Impact ◽  
Hybrid Cellular Automata ◽  
Thin Walled Structures ◽  
Thin Walled
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