Transverse strain behaviour in No. 2011 aluminium alloy subjected to cyclic loading

1992 ◽  
Vol 158 (2) ◽  
pp. 245-256 ◽  
Author(s):  
C.G. Foster ◽  
C. Meimaris ◽  
R.J. Hooker
Keyword(s):  
Cyclic Loading ◽  
Aluminium Alloy ◽  
Transverse Strain ◽  
Strain Behaviour

scholarly journals Influence of the microstructure on the cyclic stress-strain behaviour and fatigue life in hypo-eutectic Al-Si-Mg cast alloys

2018 ◽  
Vol 165 ◽  
pp. 15004 ◽  
Author(s):  
Jochen Tenkamp ◽  
Alexander Koch ◽  
Stephan Knorre ◽  
Ulrich Krupp ◽  
Wilhelm Michels ◽  
...  
Keyword(s):  
Solid Solution ◽  
Fatigue Life ◽  
Cyclic Loading ◽  
Weight Ratio ◽  
Cyclic Stress ◽  
Stress Strain ◽  
Strain Behaviour ◽  
Eutectic Morphology ◽  
Cast Alloys ◽  
Incremental Step

Aluminium alloys are promising candidates for energy-and cost-efficient components in automotive and aerospace industries, due to their excellent strength-to-weight ratio and relatively low cost compared to titanium alloys. As modern cast processing and post-processing, e.g. hot isostatic pressing, result in decreased frequency and size of defects, the weakest link depends on microstructural characteristics, e.g. secondary dendrite arm spacing (SDAS), Si eutectic morphology and α-Al solid solution hardness. Hereby, fatigue investigations of the effect of the microstructure characteristics on the cyclic stress-strain behaviour as well as fatigue mechanisms in the low cycle and high cycle fatigue regime are performed. For this purpose, samples of the aluminium cast alloy EN AC-AlSi7Mg0.3 with different Si eutectic morphology and α-Al solid solution hardness were investigated. To compare the monotonic and cyclic stress-strain curves, quasistatic tensile tests and incremental step tests were performed on two microstructure conditions. The results show that the cyclic loading leads to a hardening of the material compared to monotonic loading. Based on damage parameter Woehler curves, it is possible to predict the damage progression and fatigue life for monotonic and cyclic loading in hypo-eutectic Al-Si-Mg cast alloys by one power law.

Strain behaviour of a friction stir processed superplastic aluminium alloy sheet during free inflation tests

2016 ◽  
Vol 23 ◽  
pp. 287-295 ◽  
Author(s):  
Donato Sorgente ◽  
Sabina Luisa Campanelli ◽  
Alessandro Stecchi ◽  
Nicola Contuzzi
Keyword(s):  
Aluminium Alloy ◽  
Alloy Sheet ◽  
Friction Stir ◽  
Strain Behaviour

The coefficient of transverse strain and strain hysteresis under cyclic loading

1997 ◽  
Vol 29 (4) ◽  
pp. 339-344
Author(s):  
P. A. Fomichev ◽  
I. Yu. Trubchanin
Keyword(s):  
Cyclic Loading ◽  
Transverse Strain

Strain behaviour of sapric peat under long-term cyclic loading

2018 ◽  
Vol 171 (5) ◽  
pp. 405-421 ◽  
Author(s):  
Yu-Feng Gao ◽  
Wei Xiao ◽  
Gui-Zhong Xu ◽  
Yue Gui
Keyword(s):  
Cyclic Loading ◽  
Strain Behaviour

Investigation on the Strain Behaviour of a Precipitation-Hardenable Aluminium Alloy through a Temperature Gradient Based Heat Treatment

2015 ◽  
Vol 639 ◽  
pp. 361-368 ◽  
Author(s):  
Gabriella di Michele ◽  
Pasquale Guglielmi ◽  
Gianfranco Palumbo ◽  
Donato Sorgente
Keyword(s):  
Heat Treatment ◽  
Temperature Gradient ◽  
Aluminium Alloy ◽  
Room Temperature ◽  
Tensile Tests ◽  
Gauge Length ◽  
Image Correlation ◽  
Experimental Campaign ◽  
Strain Behaviour ◽  
Heat Treated

In this work the strain behaviour of the heat-treated 6xxx series aluminium alloy AC170PX is investigated by a not conventional approach. Thanks to the low density combined with good mechanical properties, this aluminium alloy is often adopted for automotive applications. Despite these advantages, its formability at room temperature is low. In order to overcome this limit, a distribution of the material properties can be achieved by a local heat treatment (Tailored Heat Treated Blanks). In this context, to evaluate the effects of those parameters mainly affecting the precipitation hardening (aging temperature and aging time), a first experimental campaign was conducted using conventional furnace heat treatment in different conditions . Tensile tests were run with the aim of determining the flow and the aging curves of the heat treated specimens. Starting from these results, a not uniform heat treatment was designed using a Gleeble physical simulator Heat treatments based on a temperature gradient along the sample were performed. Then, tensile tests of the so heated specimens were carried out at room temperature. Through a digital image correlation system both the distribution and the evolution of the strain along the gauge length of the specimen were analysed in order to obtain the hardening/softening working conditions related to a specific heating cycle. These results were validated by the comparison with the data obtained from the first experimental campaign.

Uniaxial stress–strain behaviour of aluminium alloy foams

1999 ◽  
Vol 47 (8) ◽  
pp. 2323-2330 ◽  
Author(s):  
K.Y.G. McCullough ◽  
N.A. Fleck ◽  
M.F. Ashby
Keyword(s):  
Aluminium Alloy ◽  
Uniaxial Stress ◽  
Stress Strain ◽  
Strain Behaviour

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.

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