Dynamic and Fatigue Study of the Automotive Upper Arm Suspension System

Abstract

Optimum design of an automotive part under random loading must satisfy two principal conditions: a safe fatigue life and a natural frequency far from the road power spectral density spectrum. Dynamic behaviour of the upper arm suspension was modelled solving the equation of motion. The quasi-static analysis was used in this study as it is highly efficient when the frequency of excitation is below the resonance frequency. The fatigue life was calculated from the multiaxial criterion equivalent to the uniaxial one based on Strain Energy Density. Finally, the critical elements were detected using a Matlab interface developed in previews work.

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].…”