On the characteristics of automotive low arm-suspension system parts made of aluminum casting alloys

Abstract

Stress behaviour of the vehicle suspension system has received much attention in recent years due to its effect on life time of different parts, especially lower suspension arm. These stresses can be reduced by optimizing and design variables of automotive lower arm suspension system as well as its materials metallurgical parameters. The high strength-to-weight ratio of aluminium casting alloys makes them materials of choice. The studied model is selected to be close to real operation of automotive suspension system. The main objectives of this study are to propose the proper variables required in design of suspension system parts and to reduce the stresses on lower arm-suspension system by materials and design optimum selection. The agreement of the vibration model of vehicle, design variables for optimization and the materials selection validates its positive effect on the mechanical and quality performance of applied parts made of aluminium alloys.

Revisión de las Características de Modelado y Optimización para el Diseño del Sistema de Suspensión Macpherson

“…Para Lee et al, (1995) la metodología de ingeniería asistida por computadora en fatiga sirve para evaluar cuantitativamente la vida de fatiga de las estructuras automotrices y para identificar áreas críticas y no atenuantes mejorándose el diseño y la reducción de peso, esto es aplicable a los resultados de análisis de elementos finitos elásticos porque el método de densidad de energía de Glinka (enfoque de corrección de plasticidad) se usa en aproximaciones de esfuerzos estáticos y elásticos, además tiene componentes para cumplir con los criterios de durabilidad a través del procedimiento de prueba de vida mecánica y prueba de resistencia real. Bouazara et al, (2016) estudiaron el brazo donde se aplicó el software ABAQUS, como un fuerte software de elementos finitos, al ejecutar el programa para imponer las cargas al brazo inferior donde se detecta la distribución del máximo esfuerzo y el desplazamiento como se muestra en la figura 6, se observa que las regiones de esfuerzo del brazo inferior que están cerca del lugar de carga impuesta tienen la mayor cantidad de desplazamiento visto en la fig. 6a.…”

“…Brazo inferior de suspensión se visualiza el máximo esfuerzo y el desplazamiento (Adaptada deBouazara et al, 2016) …”

Fatigue Cycles and Performance Evaluation of Accelerating Aging Heat Treated Aluminum Semi Solid Materials Designed for Automotive Dynamic Components

“…The suspension system usually consists of three main components: springs, dampers, and suspension linkage. Springs and dampers are responsible for the response of the vehicle under random excitations from different road conditions (and they are the subjects of research in many automotive vibration studies), while suspension linkages are the assemblies of mechanical components, linking the whole suspension system and transmitting forces to the chassis of the vehicle [5,6]. Manufacturing this mechanical component from light metals helps with enhancing vehicle performance by decreasing the unsprung mass.…”

“…Manufacturing this mechanical component from light metals helps with enhancing vehicle performance by decreasing the unsprung mass. Several studies indicate superior mechanical performance by using semi-solid casting technology for producing such automotive suspension mechanical components of aluminum alloy [1,[5][6][7].…”