English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

A method of the estimation of approximate stress intensity factor for a semi-elliptical crack at notch root was proposed. The stress distribution in the vicinity of notch root was divided into two components: uniform and linear components. The linear component was correlated with the notch root radius ρ. The stress intensity factors for these two stress components were calculated using the equations which were made on the basis of numerical results for a semi-elliptical crack at the surface of a semi-infinite body.First, the accuracy of the proposed method was checked by comparing the present values with the accurate numerical results for a semi-elliptical crack at the inner wall of a pressurized hollow cylinder with an infinite outer radius. And then, the method was applied to a semi-elliptical crack in a pressurized hollow cylinder with a finite outer radius and to a semi-elliptical crack at notch root of CT specimen.The following closed form formula is proposed for the estimation of stress intensity factors for a semi-elliptical crack at notch root in other problems.KI, D=KIT+KIBKIT=σ1√πbFIT(λ), λ=b/aFIT(λ)=1.122-0.230λ-0.901λ2+0.949λ3-0.280λ4KIB=(σ2-σ1)√πbFIB(λ)FIB(λ)=0.443-0.310λ-0.104λ2+0.206λ3-0.061λ4where σ2 is the maximum stress at notch root and σ1 is that at the point corresponding to the deepest point of the elliptical crack front.

Stress intensity factor for small surface cracks at the site of stress concentration.