Further studies on crack-tip plasticity of rapid tearing

Post

1987

Experimental Mechanics

Self Cite

Along the vertical segment 12, 34, which are tree surfaces, the second 4 term of the integrand as well as all stress components except oyy, which is subject to unaxial tension, in W vanish. Thus, the strain energy density, W, . where i is the ith segment of the contour.Along the horizontal segment 23, dy is zero and the first term of the integrand in Equation ( Again, for the a term, the same stress-strain relation, e.g., Equations (2) '. yy is used. Finally, the J-integral value is given by J = 2(J + J )V 1 04

Section: Introduction _mentioning

confidence: 99%

Stable crack growth in aluminum tensile specimens

Kang

Post

1987

Experimental Mechanics

Self Cite

Effect of Loading Rate on Dynamic Fracture of Reaction Bonded Silicon Nitride

Liaw

Fracture Mechanics: Seventeenth Volume

Emery

1986

Wedge-loaded, modified tapered double cantilever beam (WL-MTDCB) specimens under impact loading were used to determine the room temperature dynamic fracture response of reaction bonded silicon nitride (RBSN). The crack extension history, with the exception of the terminal phase, was similar to that obtained under static loading. Like its static counterpart, a distinct crack acceleration phase, which was not observed in dynamic fracture of steel and brittle polymers, was noted. Unlike its static counterpart, the crack continued to propagate at nearly its terminal velocity under a low dynamic stress intensity factor during the terminal phase of crack propagation. These and previously obtained results for glass and RBSN show that dynamic crack arrest under a positive dynamic stress intensity factor is unlikely in static and impact loaded structural ceramics.

An Impact Damage Model of Concrete

Hawkins

1985

MRS Proc.

Dynamic fracture of two impact loaded, plain concrete, three-point bend specimens was simulated using a dynamic finite element model. A three-segment fracture process zone, which was established in a previous static analysis, together with a tensile overload fracture criterion were used to propagate the crack from the tension side of the unnotched beams. Reasonable agreement between the measured and computed velocities at two points on one beam and estimated and computed average crack velocities was obtained.