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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Crack propagations in quasi-static fracture are studied theoretically. TheGriffith theory is applied to discuss a crack extension condition and motion ofcrack tips in straight propagations. Stability of the straight propagations isinvestigated based on the simple assumption that a curvature near the crack tipis determined by a singular shear stress. It is shown that straightpropagations become unstable under ceatain conditions. Combined with boundaryeffects, this instability leads to an oscillatory propagation of cracks. Thecritical conditions are calculated quantitatively.Comment: 11 pages, (Revtex), 2 figures (postscript

Oscillatory instability of crack propagations in quasistatic fracture