Experimental and numerical analyses on aluminium alloy H-section members under eccentric cyclic loading

2021 ◽  
Vol 162 ◽  
pp. 107532
Author(s):  
Jinzhi Wu ◽  
Jianhua Zheng ◽  
Guojun Sun
Keyword(s):  
Cyclic Loading ◽  
Aluminium Alloy ◽  
Numerical Analyses

Numerical analyses of caisson breakwaters on soft foundations under wave cyclic loading

2016 ◽  
Vol 30 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Yuan-zhan Wang ◽  
Zhen Yan ◽  
Yu-chi Wang
Keyword(s):  
Cyclic Loading ◽  
Numerical Analyses

Crystal Plasticity Finite Element Simulations of Polycrystalline Aluminium Alloy under Cyclic Loading

2014 ◽  
Vol 891-892 ◽  
pp. 1609-1614 ◽  
Author(s):  
Ling Li ◽  
Lu Ming Shen ◽  
Gwénaëlle Proust
Keyword(s):  
Finite Element ◽  
Cyclic Loading ◽  
Aluminium Alloy ◽  
Crystal Plasticity ◽  
Three Dimensional ◽  
Grain Morphology ◽  
Element Model ◽  
Electron Back Scatter Diffraction ◽  
Plastic Deformation Zone ◽  
Mesh Density

A three-dimensional crystal plasticity (CP) finite element model is developed to reproduce the grain level stress concentration and deformation of polycrystalline aluminium alloy 7075 (AA7075) during fatigue experiments. The grains contained in the model possess the same size and crystallographic orientations obtained from electron back-scatter diffraction experiments. A modified CP constitutive model, which considers the backstress evolution, is employed to describe the mechanical behaviour of AA7075 under cyclic loading. A round-notched specimen from a fatigue test is simulated using the proposed CP model. Convergence studies in terms of mesh density and plastic deformation zone size are carried out to determine the appropriate conditions for the simulation. The simulation results are compared with those obtained using the elasto-plastic model and the CP model without grain morphology. The comparison indicates that with the embedded grain morphology, the proposed model can capture very well the local response induced by the microstructure features, which is vital to the accurate fatigue life prediction of aluminium alloys.

Steel-Concrete Bond Deterioration under Repeated Loading for Different Confinement Levels

2012 ◽  
Vol 217-219 ◽  
pp. 188-191 ◽  
Author(s):  
Marco Valente
Keyword(s):  
Cyclic Loading ◽  
Bond Strength ◽  
Three Dimensional ◽  
Experimental Tests ◽  
Experimental Results ◽  
Numerical Analyses ◽  
Repeated Loading ◽  
Loading History ◽  
Steel Rebar ◽  
Bond Deterioration

This paper presents the results of experimental tests and numerical analyses concerning the influence of repeated cyclic loading and reinforcement confinement on bond between steel rebar and concrete. Experimental tests of push-pull type were carried out at the Politecnico di Milano on concrete specimens provided with a steel cage of longitudinal bars and stirrups, and reinforced with a single steel rebar. The experimental tests were conducted under monotonic and repeated loading history. Bond strength degradation was observed due to repeated cyclic loading. Detailed three-dimensional finite element models of the specimens were developed to reproduce laboratory tests and parametric analyses were performed to provide a better understanding of the experimental results. The numerical analyses showed good agreement with the experimental results and confirmed that the applied repeated loading history caused significant bond deterioration. High values of reinforcement confinement enhanced bond strength and delayed the onset of bond deterioration.

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