Crashworthiness Reliability Design Optimization of Aluminum Foam Filled Thin-wall Structures

2011 ◽  
Vol 47 (22) ◽  
pp. 93 ◽  
Author(s):  
Yong ZHANG
Keyword(s):  
Design Optimization ◽  
Aluminum Foam ◽  
Thin Wall ◽  
Reliability Design ◽  
Wall Structures ◽  
Foam Filled

scholarly journals Aluminum Foam-Filled Pipe Using Thin-Wall Aluminum Pipe Fabricated from Plate

2016 ◽  
Vol 80 (6) ◽  
pp. 386-389 ◽  
Author(s):  
Yoshihiko Hangai ◽  
Yukiko Nakano ◽  
Takao Utsunomiya ◽  
Osamu Kuwazuru ◽  
Soichiro Kitahara ◽  
...  
Keyword(s):  
Aluminum Foam ◽  
Thin Wall ◽  
Foam Filled ◽  
Aluminum Pipe

scholarly journals Analysis of Thin Wall Structures for Energy Absorption Applications by ABAQUS

10.29007/6w78 ◽  
2022 ◽  
Author(s):  
Cong Hoa Vu ◽  
Thi Hieu Thao Le ◽  
Phuoc Khanh Huy Nguyen
Keyword(s):  
Energy Absorption ◽  
Evaluation Criteria ◽  
Absorption Capacity ◽  
Thin Wall ◽  
Foam Material ◽  
Energy Absorption Capacity ◽  
Cross Sectional ◽  
Car Crash ◽  
Wall Structures ◽  
Foam Filled

Crash-dynamics research has always concentrated significantly in the safety, survivability of passengers in a car crash. To identify the capability of energy absorption of a crash box, a thin-walled structure will be modeled and simulated by ABAQUS software. Investigate the influence of material, cross-sectional, thickness factors on the energy absorption capacity of the tube, using MCDM – Multi-Criteria Decision-Making to get the best option and testing the improvement while filling the tube with Foam material. In this study, beside the cross-sectional, aluminum alloys and steel materials and thickness are factors that influence the energy absorption evaluation criteria, the foam material with difference density are surveyed to compare effectiveness between the foam-filled and hollow crashboxes. The results show that the folds of the foam-filled tube after deformation along the compressive direction will be more continuous and stable. More, the higher foam density, the greater the energy absorption. This prevents the crashbox from deviating from the direction of the force, help directing the collapse of the tube, thereby improving energy absorption without significantly increasing the weight of the structure.

Crashworthiness design for foam filled thin-wall structures

2009 ◽  
Vol 30 (6) ◽  
pp. 2024-2032 ◽  
Author(s):  
Shujuan Hou ◽  
Qing Li ◽  
Shuyao Long ◽  
Xujing Yang ◽  
Wei Li
Keyword(s):  
Thin Wall ◽  
Wall Structures ◽  
Crashworthiness Design ◽  
Foam Filled

scholarly journals Fabrication of Aluminum Foam-Filled Thin-Wall Steel Tube by Friction Welding and Its Compression Properties

Materials ◽  
2014 ◽  
Vol 7 (9) ◽  
pp. 6796-6810 ◽  
Author(s):  
Yoshihiko Hangai ◽  
Masaki Saito ◽  
Takao Utsunomiya ◽  
Soichiro Kitahara ◽  
Osamu Kuwazuru ◽  
...  
Keyword(s):  
Friction Welding ◽  
Aluminum Foam ◽  
Steel Tube ◽  
Thin Wall ◽  
Compression Properties ◽  
Foam Filled

Optimization of thin-wall structures using hybrid gravitational search and Nelder-Mead algorithm

2016 ◽  
Vol 58 (1) ◽  
pp. 75-78 ◽  
Author(s):  
Ali Rıza Yıldız ◽  
Enes Kurtuluş ◽  
Emre Demirci ◽  
Betul Sultan Yıldız ◽  
Selçuk Karagöz
Keyword(s):  
Thin Wall ◽  
Wall Structures ◽  
Gravitational Search ◽  
Nelder Mead Algorithm

scholarly journals Automated Reconditioning of Thin Wall Structures Using Robot-Based Laser Powder Coating

2020 ◽  
Vol 12 (4) ◽  
pp. 1477
Author(s):  
Shahram Sheikhi ◽  
Eduard Mayer ◽  
Jochen Maaß ◽  
Florian Wagner
Keyword(s):  
Laser Scanner ◽  
Powder Coating ◽  
Basic Knowledge ◽  
Thin Wall ◽  
Economic Potential ◽  
Financial Investment ◽  
Work Space ◽  
Wall Structures ◽  
Cad Cam ◽  
Relevant Component

Implementing digitalization in the field of production represents a major hurdle for some small- and medium-sized enterprises (SMEs) due to the ensuing demands on employees and, in some cases, the significant financial investment required. The RobReLas research project has developed a system whose purpose is to enable an economical solution to this dilemma for SMEs in the field of automated, robot-based reconditioning of components. A laser scanner was integrated in the robot’s control. The data generated by the scanner are used to mathematically describe the virtual area of the surface to be laser-treated. The scanner recognizes the relevant area within the robot’s predefined work space by defining the maximum length and width of the relevant component. The system then automatically applies predefined and qualified repair strategies in the virtual area. Tests on nickel-based blades demonstrated the system’s economic potential, showing a reduction in reconditioning time of about 70% compared to the conventional reconditioning method. The main advantage of the system is the fact that a basic knowledge of operating robots is sufficient for the attainment of repeatable results. Further, no additional CAD/CAM workstations are required for implementation.

scholarly journals Low-Roughness-Surface Additive Manufacturing of Metal-Wire Feeding with Small Power

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4265
Author(s):  
Bobo Li ◽  
Bowen Wang ◽  
Greg Zhu ◽  
Lijuan Zhang ◽  
Bingheng Lu
Keyword(s):  
Additive Manufacturing ◽  
High Surface ◽  
Deposition Process ◽  
High Energy ◽  
Width Ratio ◽  
Thin Wall ◽  
Small Power ◽  
High Surface Quality ◽  
Wall Structures ◽  
Wire Feed

Aiming at handling the contradiction between power constraint of on-orbit manufacturing and the high energy input requirement of metal additive manufacturing (AM), this paper presents an AM process based on small-power metal fine wire feed, which produces thin-wall structures of height-to-width ratio up to 40 with core-forming power only about 50 W. In this process, thermal resistance was introduced to optimize the gradient parameters which greatly reduces the step effect of the typical AM process, succeeded in the surface roughness (Ra) less than 5 μm, comparable with that obtained by selective laser melting (SLM). After a 10 min electrolyte-plasma process, the roughness of the fabricated specimen was further reduced to 0.4 μm, without defects such as pores and cracks observed. The ultimate tensile strength of the specimens measured about 500 MPa, the relative density was 99.37, and the Vickers hardness was homogeneous. The results show that the proposed laser-Joule wire feed-direct metal deposition process (LJWF-DMD) is a very attractive solution for metal AM of high surface quality parts, particularly suitable for rapid prototyping for on-orbit AM in space.

Reliability-Based Design Optimization for Nonlinear Energy Harvesters

2015 ◽  
Author(s):  
Sumin Seong ◽  
Christopher Mullen ◽  
Soobum Lee
Keyword(s):  
Energy Harvesting ◽  
Design Optimization ◽  
Reliability Based Design Optimization ◽  
Vibration Energy Harvester ◽  
Reliability Design ◽  
Energy Harvesters ◽  
Reliability Based Design ◽  
Stable Characteristic ◽  
Tip Mass ◽  
Nonlinear Energy

This paper presents reliability-based design optimization (RBDO) and experimental validation of the purely mechanical nonlinear vibration energy harvester we recently proposed. A bi-stable characteristic was embodied with a pre-stressed curved cantilever substrate on which piezoelectric patches were laminated. The curved cantilever can be simply manufactured by clamping multiple beams with different lengths or by connecting two ends of the cantilever using a coil spring. When vibrating, the inertia of the tip mass activates the curved cantilever to cause snap-through buckling and makes the nature of vibration switch between two equilibrium positions. The reliability-based design optimization study for maximization of power density and broadband energy harvesting performance is performed. The benefit of the proposed design in terms of excellent reliability, design compactness, and ease of implementation is discussed. The prototype is fabricated based on the optimal design result and energy harvesting performance between the linear and nonlinear energy harvesters is compared. The excellent broadband characteristic of the purely mechanical harvester will be validated.

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