scholarly journals Selection of Die Material and Its Impact on the Multi-Material Extrusion of Bimetallic AZ31B–Ti6Al4V Components for Aeronautical Applications

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7568
Author(s):  
Daniel Fernández ◽  
Alvaro Rodríguez-Prieto ◽  
Ana María Camacho
Keyword(s):  
Material Selection ◽  
Normal Pressure ◽  
Element Model ◽  
Extrusion Process ◽  
Extrusion Force ◽  
Damage Distribution ◽  
Material Extrusion ◽  
Key Factor ◽  
Die Material ◽  
Selection Of

This paper investigates the effect that the selection of the die material generates on the extrusion process of bimetallic cylindrical billets combining a magnesium alloy core (AZ31B) and a titanium alloy sleeve (Ti6Al4V) of interest in aeronautical applications. A robust finite element model is developed to analyze the variation in the extrusion force, damage distribution, and wear using different die materials. The results show that die material is a key factor to be taken into account in multi-material extrusion processes. The die material selection can cause variations in the extrusion force from 8% up to 15%, changing the effect of the extrusion parameters, for example, optimum die semi-angle. Damage distribution in the extrudate is also affected by die material, mainly in the core. Lastly, die wear is the most affected parameter due to the different hardness of the materials, as well as due to the variations in the normal pressure and sliding velocity, finding critical values in the friction coefficient for which the die cannot be used for more than one forming stage because of the heavy wear suffered. These results can potentially be used to improve the efficiency of this kind of extrusion process and the quality of the extruded part that, along with the use of lightweight materials, can contribute to sustainable production approaches.

scholarly journals Effect of Process Parameters and Definition of Favorable Conditions in Multi-Material Extrusion of Bimetallic AZ31B–Ti6Al4V Billets

2020 ◽  
Vol 10 (22) ◽  
pp. 8048
Author(s):  
Daniel Fernández ◽  
Alvaro Rodríguez-Prieto ◽  
Ana María Camacho
Keyword(s):  
Influencing Factor ◽  
Element Model ◽  
Extrusion Process ◽  
Extrusion Force ◽  
Core Diameter ◽  
The Core ◽  
Ram Speed ◽  
Definition Of ◽  
Favorable Conditions ◽  
Influential Parameters

This paper investigates the extrusion process to manufacture bimetallic cylinders combining a magnesium alloy core (AZ31B) and a titanium alloy sleeve (Ti6Al4V) of interest in aeronautical applications. A robust finite element model has been developed to determine the most influential parameters and to study the effect of them on the extrusion force and damage induced by means of Design of Experiments (DOE) and Taguchi method. The results show that the most influential parameters in the extrusion forces are the friction between sleeve and container/die and the height of the cylinder; and the less influential ones are the process temperature and ram speed. Moreover, minimum values of forces along with low damage can be reached by favorable interface contact conditions, minimizing the friction at the core-container/die interface, as the main influencing factor; followed by the geometrical dimensions of the billet, being the billet height more important when paying attention to the minimum forces, and being the core diameter when considering the minimum damage as the most important criterion. The results can potentially be used to improve the efficiency of this kind of extrusion process and the quality of the extruded part that, along with the use of lightweight materials, can contribute to sustainable production approaches.

Design and Analysis on Fan-Shape Four Pyramid Grid with Single Point Supporting

2012 ◽  
Vol 166-169 ◽  
pp. 207-210
Author(s):  
Ke Li ◽  
Jing Ji
Keyword(s):  
Material Selection ◽  
Single Point ◽  
Canopy Structure ◽  
Element Model ◽  
Internal Force ◽  
Structure Design ◽  
Structural Deformation ◽  
Grid Structure ◽  
Shape Variable ◽  
Selection Of

Combined with canopy structure design of a old-man university, this paper introduces the selection of scheme, material selection and Load value of fan-shape variable height four pyramid grid structure. Using the software ANSYS, finite element model of grid structure is established, and internal force and deformation of the members are got, the bearing capacity of the members and structural deformation are checked, finally design and construction for the node of members and the detail of structure are given, these can provide references for the design of similar engineering.

scholarly journals Heat transfer of insulation structure for large cryogenic wind tunnel

2020 ◽  
pp. 253-253
Author(s):  
Yuan-Jia Song ◽  
Wan-Hua Chen ◽  
Huan Lai ◽  
Da-Xiong Liao ◽  
Yu Hou
Keyword(s):  
Heat Transfer ◽  
Wind Tunnel ◽  
Material Selection ◽  
Element Model ◽  
Conduction Model ◽  
Work Condition ◽  
Testing Platform ◽  
Cryogenic Wind Tunnel ◽  
The Finite Element Model ◽  
Selection Of

In order to maintain the cryogenic environment of cryogenic wind tunnel in service, heat transfer of insulation structure is investigated in this work. Firstly, the design and material selection of insulation structure is conducted. Afterwards, theoretical calculation on heat transfer of insulation structure is carried out based on one-dimensional heat conduction model. Subsequently, the finite element model of insulation structure is established, on this basis, involving the actual work condition of cryogenic wind tunnel, heat transfer of the insulation structure is numerically calculated. Finally, the testing platform able to simulate the work environment of cryogenic wind tunnel is built and the temperature measurement experiments at the cryogenic condition and at the cryogenic pressure condition are carried out respectively. The obtained results show that the designed insulation structure is in possession of great insulation characteristics to ensure the cryogenic environment of cryogenic wind tunnel. Additionally, the established testing platform can provide a testing method to investigate the heat transfer character of other materials or structures in cryogenic environment.

scholarly journals Research on Curved Layer Slicing and Spatial Path Generation Method in Five-axis Material Extrusion Process

2021 ◽  
Vol 1884 (1) ◽  
pp. 012013
Author(s):  
Anpei Li ◽  
Lianggang Li ◽  
Yaxiong Liu ◽  
Bin Cui ◽  
Yongkang Li ◽  
...  
Keyword(s):  
Extrusion Process ◽  
Path Generation ◽  
Material Extrusion ◽  
Five Axis

scholarly journals Finite Element Method modeling of Additive Manufactured Compressor Wheel

2021 ◽  
Author(s):  
Márton Tamás Birosz ◽  
Mátyás Andó ◽  
Sudhanraj Jeganmohan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Finite Element Method Simulation ◽  
Element Model ◽  
Tensile Tests ◽  
Raw Material ◽  
Isotropic Hardening ◽  
Compressor Wheel ◽  
Material Extrusion ◽  
Element Method

AbstractDesigning components is a complex task, which depends on the component function, the raw material, and the production technology. In the case of rotating parts with higher RPM, the creep and orientation are essential material properties. The PLA components made with the material extrusion process are more resistant than VeroWhite (material jetting) and behave similarly to weakly cross-linked elastomers. Also, based on the tensile tests, Young’s modulus shows minimal anisotropy. Multilinear isotropic hardening and modified time hardening models are used to create the finite element model. Based on the measurements, the finite element method simulation was identified. The deformation in the compressor wheel during rotation became definable. It was concluded that the strain of the compressor wheel manufactured with material extrusion technology is not significant.

scholarly journals Procedure for the Selection of Rubber Compound in Rubber-Metal Springs for Vibration Isolation

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1737
Author(s):  
Milan Banić ◽  
Dušan Stamenković ◽  
Aleksandar Miltenović ◽  
Dragan Jovanović ◽  
Milan Tica
Keyword(s):  
Numerical Simulation ◽  
Constitutive Model ◽  
Vibration Isolation ◽  
Correct Selection ◽  
Virtual Experiment ◽  
Rubber Compound ◽  
Key Factor ◽  
Railway Engineering ◽  
Selection Of

The selection of a rubber compound has a determining influence on the final characteristics of rubber-metal springs. Therefore, the correct selection of a rubber compound is a key factor for development of rubber-metal vibration isolation springs with required characteristics. The procedure for the selection of the rubber compound for vibration isolation of rubber-metal springs has been proposed, so that the rubber-metal elements have the necessary characteristics, especially in terms of deflection. The procedure is based on numerical simulation of spring deflection with Bergström-Boyce constitutive model in virtual experiment, with a goal to determine which parameters of the constitutive model will lead to spring required deflection. The procedure was verified by case study defined to select rubber compound for a rubber–metal spring used in railway engineering.

scholarly journals Selection of Adequate Species for Degraded Areas by Oil‐Exploitation Industry as a Key Factor for Recovery Forest in the Ecuadorian Amazon

2016 ◽  
Vol 27 (7) ◽  
pp. 1771-1780 ◽  
Author(s):  
Jaime Villacís ◽  
Cristina Armas ◽  
Susana Hang ◽  
Fernando Casanoves
Keyword(s):  
Oil Exploitation ◽  
Ecuadorian Amazon ◽  
Key Factor ◽  
Selection Of

Research on Material Selection with Multi-Attribute Decision Method and G1 Method

2014 ◽  
Vol 952 ◽  
pp. 20-24 ◽  
Author(s):  
Xue Jun Xie
Keyword(s):  
Material Selection ◽  
Selection Process ◽  
Selection Problem ◽  
Topsis Method ◽  
Attribute Weight ◽  
Multi Attribute Decision Making ◽  
Judgment Matrix ◽  
Optimal Material ◽  
Selection Of ◽  
Better Than

The selection of an optimal material is an important aspect of design for mechanical, electrical, thermal, chemical or other application. Many factors (attributes) need to be considered in material selection process, and thus material selection problem is a multi-attribute decision making (MADM) problem. This paper proposes a new MADM method for material selection problem. G1 method does not need to test consistency of the judgment matrix. Thus it is better than AHP. In this paper, firstly, we use the G1 method to determine the attribute weight. Then TOPSIS method is used to calculate the closeness of the candidate materials with respect positive solution. A practical material selection case is used to demonstrate the effectiveness and feasibility of the proposed method.

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