Test geometries | Calculation equation | Dimensions mm |
---|---|---|
| If h ≥ 2a, w ≥ πa. \( K_{IIc} = \frac{\sigma }{4}\left( {\pi a} \right)^{1/2} \) If h ≥ 2a, w ≤ πa \( K_ {IIc} = \frac{\sigma }{4}w^{{{\raise0.5ex\hbox{$\scriptstyle 1$} \kern-0.1em/\kern-0.15em \lower0.25ex\hbox{$\scriptstyle 2$}}}} \) Proposed by Reinhardt et al. (1997) | 2h = 200 2a = 140, 120, 100 w = 100 Thickness = 100 |
| \( K_{IIc}= \frac {5.11{\it {P}_Q}} {2{\it {BW}}}\left( {\pi a} \right)^{1/2} \) | Cube 150 mm a = 45, 60, 75 w = 150 B = w − a |
| \( {K}_{IIc} {\mkern 1mu} = - \frac{{2{P}}}{{t}}\sqrt {\frac{\lambda }{{\pi R}}} \left\{ {\begin{array}{l} {B_{0} - \lambda ^{2} \left( {B_{0} + \frac{1}{2}B_{2} } \right) + \lambda ^{4} \left( { - \frac{1}{8}B_{0} + \frac{1}{4}B_{2} + \frac{3}{8}B_{4} } \right){\text{ }}} \\ { + \lambda ^{6} \left( {B_{0} - \frac{1}{{16}}B_{2} + \frac{1}{8}B_{4} + \frac{5}{{16}}B_{6} } \right)} \\ { + {\text{ }}\lambda ^{8} \left( { - \frac{{17}}{{64}}B_{0} + \frac{3}{8}B_{2} - \frac{5}{{128}}B_{4} + \frac{5}{{64}}B_{6} + \frac{{35}}{{128}}B_{8} } \right)} \\ \end{array} } \right\} \) λ = a/R, and β: the notch inclination angle = 30° B 0 = sin 2β, B2 = 2 [sin4β − sin2β], B4 = 3 [sin6β − 2sin4β]. B 6 = 4 [sin8β − 3sin6β], B 8 = 5 [sin10β − 4sin8β]. Proposed by Irobe and Pen (1992) | β = 30° R = 75 Thickness = 60 2a = 45, 60, 75 |
| \( {K}_{IIc} = {Y}_{II} \sigma \sqrt {\pi a} \) Proposed by Iosipescu (1967) | Prism 100 × 100 × 500 a = 30, 40, 50 Loaded span = 400 |