A new evaluation procedure for crack closure

Abstract Bending fatigue tests can be used as a simple method for the determination of load-displacement curves near threshold for specimens containgng surface cracks. The test method involves a strain gauge technique that yields highly reproducible results for cyclic loading from positive to negative stress ratios. Applying a new evaluation procedure one obtains ΔKth,eff values that are considered to be more realistic compared with those determined by conventional methods.

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