AA2024铝合金冷挤压成形的有限元分析研究

Q2 Engineering

INCAS Bulletin Pub Date : 2022-09-09 DOI:10.13111/2066-8201.2022.14.3.14

Anupama Francy Kothasiri, S. R. Chalamalasetti

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引用次数: 0

摘要

近年来，人们对挤压过程建模的兴趣导致了几种分析和数值方法的发展。本工作优化了AA 2024铝合金材料的冷挤压工艺变量（模具角度（DA）、冲压速度（RS）、摩擦系数（CoF））对挤压力、位移、损伤和时间的影响。使用DEFORMTM-3D软件进行了数值模拟，并研究了AA2024铝坯料在锥形模具上塑性变形过程中的行为。模具/容器和冲头（顶模）被视为刚体，在挤压过程中保持室温。按照L27田口正交阵列进行模拟。对获得的结果进行方差分析。通过灰色关联分析（GRA）进行使用多个变量的优化。在DA级别2、RS级别2和CoF级别3（最小挤压力、损伤和时间）下进行的实验获得了最高的灰色关联度（GRG），并且通过GRA获得了（最大位移）。系统地考察了冲压速度、摩擦系数和模具角度对冲压成形的影响。在30°DA、冲压速度为3mm/min的条件下，损伤系数相当大。

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Investigation of Cold Extrusion of Aluminum AA 2024 Alloy using Finite Element Analysis

In recent years, the interest in modeling extrusion processes has resulted in the development of several analytical and numerical methodologies. The present work optimizes cold extrusion process variables (Die angle (DA), Ram speed (RS), Coefficient of friction (CoF)) on extrusion force, displacement, damage and time for the Aluminum AA 2024 alloy material. DEFORMTM-3D software is used to carry out numerical simulations and to study the behavior of the Aluminum AA 2024 billet during the plastic deformation over the conical die. The die/ container and ram (top die) are considered as rigid bodies and the room temperature is maintained during the extrusion process. The simulations are conducted as per L27 Taguchi orthogonal array. The obtained results are analyzed in ANOVA. An optimization using multiple variables is performed by grey relational analysis (GRA). The highest grey relational grade (GRG) is obtained for experiments conducted at DA level 2, RS level 2, and CoF level 3 (minimum extrusion force, damage and time) and (maximum displacement) is achieved by GRA. Systematically, the influence of the ram speed, coefficient of friction, and die angle are examined. The damage factor is considerable at 30° DA under the ram speed of 3mm/min.

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来源期刊

INCAS Bulletin Engineering-Aerospace Engineering

自引率

0.00%

发文量

审稿时长

8 weeks

期刊介绍： INCAS BULLETIN is a scientific quartely journal published by INCAS – National Institute for Aerospace Research “Elie Carafoli” (under the aegis of The Romanian Academy) Its current focus is the aerospace field, covering fluid mechanics, aerodynamics, flight theory, aeroelasticity, structures, applied control, mechatronics, experimental aerodynamics, computational methods. All submitted papers are peer-reviewed. The journal will publish reports and short research original papers of substance. Unique features distinguishing this journal: R & D reports in aerospace sciences in Romania The INCAS BULLETIN of the National Institute for Aerospace Research "Elie Carafoli" includes the following sections: 1) FULL PAPERS. -Strength of materials, elasticity, plasticity, aeroelasticity, static and dynamic analysis of structures, vibrations and impact. -Systems, mechatronics and control in aerospace. -Materials and tribology. -Kinematics and dynamics of mechanisms, friction, lubrication. -Measurement technique. -Aeroacoustics, ventilation, wind motors. -Management in Aerospace Activities. 2) TECHNICAL-SCIENTIFIC NOTES and REPORTS. Includes: case studies, technical-scientific notes and reports on published areas. 3) INCAS NEWS. Promote and emphasise INCAS technical base and achievements. 4) BOOK REVIEWS.