Equation 8 · Part 1 · Why Materials Fail: Fracture, Flaws and the Inspection Interval
Symbol gamma_s
What this part means
the modulus e and surface energy.
Its job in the formula
gamm is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol gamma_s→Article meaning
Where the article explains it
For a through-thickness crack of half-length a in a linear-elastic plate with modulus E and surface energy , the critical remote stress is
The passage around this formula
Griffith’s criterion is an accounting statement. Extending a crack by a small increment releases stored elastic strain energy from the material that unloads around the new crack faces, and consumes energy in creating those faces. If the release exceeds the cost, extension is spontaneous and the crack runs. For a through-thickness crack of half-length a in a linear-elastic plate with modulus E and surface energy , the critical remote stress is
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
Open the illustrated subscripts: which member of a family? guide →
See this notation across published equations →
The article lists its research sources here.