In-phase multiaxial fatigue experimental analysis of welded cylindrical 6063-T66 aluminium alloy specimens

Abstract

This paper is concerned with an experimental and numerical study of the fatigue behaviour of cylindrical 6063-T66 welded specimens subjected to biaxial loading. In-phase torsion-bending fatigue tests under constant amplitude loading were performed in a standard electromechanical machine with a suitable gripping system. The experimental part was focused on the modeling of combined biaxial loading and determining the number of cycles to fracture in the region of low-cycle fatigue. In-phase loading can be treated fairly well using the conventional hypotheses (von Mises or Tresca) on basis of the nominal, structural or local strains or stresses. Based on the experimental results the fatigue design curves are compared to the fatigue data from base metal and weldments.

Multiaxial Fatigue Experimental Analysis of 6063-T66 Aluminum Alloy of the Base Material and the Welded Material

“…As a welding wire material there was used aluminium wire AlSi5 with diameter 2mm. The joint strength of TIG-welded joints was evaluated bz fatigue testing, using the test specimens shown in Figure 2 ( Kopas and Sága, 2013).…”

“…For evaluation of fatigue curves it is necessary to know stress and strain conditions on individual loading levels. A sinusoidal waveform was used as command signal (Kopas and Sága, 2013).…”

Influence of Stress Mode on Failure Micromechanisms of Nodular Cast Iron

“…The fatigue tests were made by STN 42 0362 at high-frequency sinusoidal cyclic push-pull loading (frequency f ≈ 20 kHz, stress ratio R = -1, temperature T = 20 ± 5 °C) using the ultrasonic testing equipment KAUP-ZU [8][9][10].…”

Fatigue Resistance of Self-hardening Aluminium Cast Alloy

“…Fatigue tests were performed on a rotating bending fatigue device in Politecnico di Milano in Italy, with the use of parameters (temperature T = 20 ± 5 °C, frequency 40 Hz, stress ratio R = -1). The set of smooth specimens (11PCS) have been carried out at a different cyclic stresses based on Wöhler´s curve [12]. The samples were fatigue tested at different stress levels, ranging from 100 MPa to 90MPa, 80 MPa, 70 MPa and 60 MPa.…”