应力集中区预诱发微裂纹对下悬臂应力强度因子影响的数值估计

IF 0.6 4区 工程技术 Q4 MECHANICS
Mechanika Pub Date : 2023-04-19 DOI:10.5755/j02.mech.31660
Kishorekanna Gunasekaran, Isaac Solomon, P. Griškevičius
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引用次数: 0

摘要

结构钢具有延展性,这就是它被用于制造业大多数部门的原因。尽管它具有结构强度,但由于不稳定、疲劳、动态和冲击载荷,它面临着令人信服和具有挑战性的故障。本研究使用有限元方法评估了其中一种荷载条件下的结构响应。汽车下悬架臂的设计在Solidworks 2020中进行了建模,并在Ansys 2021 R1中针对静态弹性条件进行了求解。然后,在身体不同部位的应力集中区,将一组预诱发骨折集成到计算模型中,并独立求解。共产生五个微裂纹,每个裂纹由六个轮廓组成。对于下悬架臂的数值模拟,必须获得实时加载条件,以模拟真实世界的加载场景。因此,选择了4种求解模式,这些模式将描述悬架下臂可以获得最大载荷的真实故障场景。在每个模式中估计最大载荷值,并将其集成到具有用于计算方法的预定义边界条件的模型中。对于每种模式的应力强度因子以及与最大裂纹扩展速率相关的裂纹,给出了详细的数值比较结论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical estimation of the influence of pre-induced micro-cracks in the stress concentration zone on the SIFs of a lower suspension arm
Structural steel is ductile in nature, this is the reason it is used in most of the Sectors in the manufacturing industry. Despite its structural strength, it faces compelling and challenging failures due to unstable, fatigue, dynamic and shock loads.                This research study evaluates the structural response on one of these loading conditions using the finite element method. The design of a lower suspension arm of an automobile is modelled in Solidworks 2020 and is solved for static elastic conditions in Ansys 2021 R1. A set of pre-induced fractures are then integrated into the computational model in the Stress concentration zones in different parts of the body and solved independently. A total of five micro-cracks are induced with each crack consisting of six contours. For the numerical simulation of lower suspension arm, real-time loading conditions must be attained to resemble real-world loading scenario. Hence, 4 modes of solving were chosen which would depict the real-world failure scenario where the suspension lower arm can attain maximum loads. The maximum load values are estimated in each mode and is integrated into the model with predefined boundary conditions for the computational approach.                A detailed numerical comparative conclusion is drawn regarding the SIFs of every mode and the crack that pertains maximum crack propagation rate.
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来源期刊
Mechanika
Mechanika 物理-力学
CiteScore
1.30
自引率
0.00%
发文量
50
审稿时长
3 months
期刊介绍: The journal is publishing scientific papers dealing with the following problems: Mechanics of Solid Bodies; Mechanics of Fluids and Gases; Dynamics of Mechanical Systems; Design and Optimization of Mechanical Systems; Mechanical Technologies.
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