What is it about?
The accumulation of plastic deformation and strain over asymmetric loading cycles promotes damage particularly when coupled with fatigue cycles. The existence of stress raisers (notch) on the load-bearing components requires a reliable design against failure.
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Why is it important?
Components with stress raisers and notches are highly prime to catastrophic failure when subjected to cyclic stresses. To safeguard load-bearing notched components against progressive plastic deformation, a reliable design and stress analysis is essential.
Perspectives
The presented research work is unique to address local ratcheting response of steel samples with different notch sizes subjected to various stress levels. This study conducts ratcheting experiments and measures local strains at the vicinity of notch roots at various loading conditions. Such data are very rare in the literature. Data and assessment presented in this study will provide researchers in the field with better understanding of ratcheting response at notch roots.
A. Varvani-Farahani
Ryerson University
Read the Original
This page is a summary of: Ratcheting Examination of 1045 Notched Steel Plates under Low-High and High-Low Sequences, Journal of Testing and Evaluation, April 2020, ASTM International,
DOI: 10.1520/jte20190728.
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