Ramp tension on an ideal wide plate containing a central crack. Track stress intensity, the estimated small plastic zone and the toughness criterion; crossing it ends the elastic assessment.
• 3D scene parts: ideal wide plate; central through-crack, length 2a; crack-tip field contours; remote tensile loading; small-scale plastic-zone estimate. • Controls: initial half-crack length a (1–15 mm), requested far-field stress (20–250 MPa), mode-I toughness Kc (15–70 MPa√m), yield strength for zone estimate (200–800 MPa). • Live readouts: applied remote stress; mode-I stress intensity; stress reaching Kc; plane-stress plastic-zone estimate; k / Kc; criterion reached · 1=yes. • Guided experiments: Longer initial flaw; Stay below criterion; Reach fracture criterion. • Four tabs (visual laboratory, curves and measurements, experiments, learn and assess), a model-verification run, a timestamped event log and a trial report.
K=σ√(πa), with a in metres and geometry factor Y=1 σ_c=Kc/√(πa) r_p=(K/σ_y)²/(2π) metres Load ramps over 10 s and stops at the first K≥Kc criterion.
Linear-elastic wide-plate central-crack assessment, not a crack-propagation simulation. The scene highlights the criterion without claiming a computed fracture path. Kc is an entered teaching parameter, not a certified KIC test. If plastic-zone size is not small relative to a, LEFM interpretation is questionable. Try the preset experiments, then compare the live readouts with the equations.
No, it multiplies K by √2. The crack length enters under a square root.
No. The elastic asymptotic assessment needs plasticity confined near the tip.
Linear-elastic wide-plate central-crack assessment, not a crack-propagation simulation. The scene highlights the criterion without claiming a computed fracture path. Kc is an entered teaching parameter, not a certified KIC test. If plastic-zone size is not small relative to a, LEFM interpretation is questionable.