关于合金变化对铝型材破碎行为影响的数值研究

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-10-30 DOI:10.1016/j.tws.2024.112618

Marcos Fernandez, Miguel Costas, Odd Sture Hopperstad, David Morin

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引用次数: 0

摘要

通过基于壳体的有限元分析，研究了铝合金 AA6005 的化学成分变化对双腔挤压型材的轴向挤压和弯曲性能的影响。采用了一种新颖的顺序建模方法，包括纳米结构建模、虚拟拉伸试验和定位分析，以确定 AA6005 合金几种变体的屈服强度、加工硬化和延展性。从模型中获得的数据用于校准各向同性弹塑性构成模型的参数和非耦合损伤准则。针对所有温度为 T6 的 AA6005 合金变体，对双腔挤压型材的轴向挤压和三点弯曲进行了显式有限元分析。通过将有限元分析结果与现有实验数据进行比较，结果揭示了化学成分的变化如何显著影响挤压铝型材在轴向挤压和弯曲时的结构完整性。

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Numerical study on the effects of alloying variations on the crushing behaviour of an aluminium profile

The effects of variations in the chemical composition of an aluminium alloy AA6005 on the axial crushing and bending behaviour of a double chamber extruded profile are investigated by shell-based finite element analyses. A novel sequential modelling method, including nanostructure modelling, virtual tensile testing and localisation analyses, is used to determine the yield strength, work-hardening, and ductility of several variants of the AA6005 alloy. The data obtained from the models are used to calibrate the parameters of an isotropic elastic–plastic constitutive model and an uncoupled damage criterion. Explicit finite element analyses of axial crushing and three-point bending of the double chamber extruded profile are conducted for all variants of the AA6005 alloy in temper T6. By comparing the results of the finite element analyses with existing experimental data, the results reveal how variations in the chemical composition significantly influence the structural integrity of the extruded aluminium profile in axial crushing and bending.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.