An energy based regression method to evaluate critical CTOA of pipeline steels by instrumented drop weight tear tests
Source abstract
Abstract
An energy based regression method to estimate critical crack-tip-opening-angle (\(\hbox {CTOA}_\mathrm{C}\)) of high strength and toughness pipeline steels has been established derived from the Martinelli-Venzi ductile fracture model. Key curve method was applied onto the load-displacement curves of standard pressed-notch drop-weight-tear-test specimens to evaluate the dynamic crack extension, providing a way to verify the correlation between the load and remaining ligament width. In the meanwhile, the material based parameter (\(\hbox {A}* \upsigma _\mathrm{f}\)), usually required by other \(\hbox {CTOA}_\mathrm{C}\) estimation algorithm, could also be determined experimentally. As a result, \(\hbox {CTOA}_\mathrm{C}\) of a typical high grade pipeline steel plate was acquired as a constant over steady-state stage during crack propagation, independent of specimen geometry.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · Metal Forming Simulation Techniques · Non-Destructive Testing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (19)
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