Unifying Monotonic and Hysteresis Material Properties for Notch Plasticity Analysis under Variable Amplitude Loads

Xiao Bo Yu; Qian Chu Liu; Chris Wallbrink

doi:10.4028/www.scientific.net/AMR.891-892.500

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Unifying Monotonic and Hysteresis Material Properties for Notch Plasticity Analysis under Variable Amplitude Loads
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 891-892Unifying Monotonic and Hysteresis Material...

Unifying Monotonic and Hysteresis Material Properties for Notch Plasticity Analysis under Variable Amplitude Loads

Abstract:

This study was performed in support of accurate notch plasticity analysis under variable amplitude loads. Monotonic and cyclic strain-controlled tests were performed on flat dog-bone coupons machined from 6.35mm thick 7075-T651 aluminium alloy plates. The tests with low-high-low strain amplitude transitions revealed both an instant softening following the high strain amplitude cycle and a gradual recovery during the subsequent low strain amplitude cycles. The transition from monotonic-like to hysteresis-like material behaviour was found to be consistent with an overload induced softening and recovery process. A conceptual consideration is thus proposed to unify the characterisation of monotonic and hysteresis material properties. The implications of the present finding on notch plasticity analysis are also discussed.

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Periodical:

Advanced Materials Research (Volumes 891-892)

Pages:

500-505

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.891-892.500

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Online since:

March 2014

Authors:

Xiao Bo Yu*, Qian Chu Liu, Chris Wallbrink

Keywords:

Hysteresis, Monotonic, Notch, Reversible, Softening, Variable Amplitude Loads

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