Crack-opening-displacement measurements of a dynamically loaded crack

Influence of flaw inclination angle and loading condition on crack initiation and propagation

“…Theoretical studies related to cracking processes can be broadly classified into three categories, namely, development and verification of crack initiation criteria, studies based on analytical methods, and studies based on numerical methods. Most of the studies of crack initiation criteria focus on criteria based on Linear Elastic Fracture Mechanics (LEFM) (Griffith, 1920;Hoelzer et al, 1986;Irwin et al, 1968;Lajtai et al, 1990;Maiti and Smith, 1984;McMillan and Pelloux, 1970;Palmer et al, 1974;Rossmanith, 1983;Sommer and Soltész, 1971;Sullivan and Crooker, 1977;Wang and Shrive, 1995;Wells, 1969) and criteria based on the Materials Strength (MS) (Atkinson, 1987). Compared with the MS criteria, the LEFM criteria have the advantage and capability of predicting the length of crack propagation (Atkinson, 1987).…”

Fracture dynamics problem on mode I semi-infinite crack

“…However, a lot of engineering structures are instable under the conditions of dynamic loadings, and the static theory cannot efficaciously solve a series of dynamic queries; therefore, it is essential to research the dynamic fracture problems. In view of the complexity and difficulty in mathematical operations for fracture dynamics, both numerical solutions and half analytical solutions are obtained by fewer researchers [6][7][8][9][10][11]; moreover, analytical solutions are attained much less [12][13][14]. On account of those situations mentioned above, so it is necessary to study fracture dynamics problem of mode I semi-infinite crack.…”

Fracture dynamics problems of mode I semi-infinite crack for anisotropic orthotropic body

“…Re ξ(τ ) = 0, τ >V Im ξ(τ ) = 0, 0 < τ < V (11) Considering synthetically asymmetry and the conditions of the infinite point of the plane corresponding to the origin of coordinates of the physical plane as well as singularity of the stress at the crack tip [23,24], the elementary solution of the above problems can be obtained as…”

“…However, a lot of engineering structures are usual instable under the conditions of dynamic loadings, and the static theory cannot effectively resolve a series of dynamic problems, so it is essential to investigate the dynamic fracture problems. In view of the complexity, cockamamie, and difficulty in mathematics for fracture dynamics, both numerical solutions and half analytical solutions are obtained by fewer researchers [6][7][8][9][10][11]; moreover, analytical solutions are gained much less [12][13][14]. So, it is necessary to study the dynamic fracture problem of a mode I crack surfaces subjected to the moving increasing loads.…”