The Experts below are selected from a list of 219 Experts worldwide ranked by ideXlab platform

Theo Fett - One of the best experts on this subject based on the ideXlab platform.

S Hasan - One of the best experts on this subject based on the ideXlab platform.

  • Crack Opening Displacement for two unequal straight Cracks with coalesced plastic zones a modified dugdale model
    Applied Mathematical Modelling, 2011
    Co-Authors: R R Bhargava, S Hasan
    Abstract:

    Abstract The problem investigated is of an infinite plate weakened by two collinear unequal hairline straight quasi-static Cracks. Uniform constant tension is applied at infinity in a direction perpendicular to the rims of the Cracks. Consequently the rims of the Cracks open in Mode I type deformation. The tension at infinity is increased to the limit such that the plastic zones developed at the two adjacent interior tips of Cracks get coalesced. To arrest the Crack from further Opening normal cohesive variable stress distribution is applied on the rims of the plastic zones. Closed form analytic expressions are obtained for load bearing capacity and Crack Opening Displacement (COD). An illustrative case is discussed to study the behavior of load bearing capacity and Crack Opening Displacement with respect to affecting parameters viz. Crack length, plastic zone length and inter Crack distance between the two Cracks. Results obtained are reported graphically and analyzed.

  • Crack Opening Displacement for two unequal straight Cracks with coalesced plastic zones – A modified Dugdale model
    Applied Mathematical Modelling, 2011
    Co-Authors: R R Bhargava, S Hasan
    Abstract:

    Abstract The problem investigated is of an infinite plate weakened by two collinear unequal hairline straight quasi-static Cracks. Uniform constant tension is applied at infinity in a direction perpendicular to the rims of the Cracks. Consequently the rims of the Cracks open in Mode I type deformation. The tension at infinity is increased to the limit such that the plastic zones developed at the two adjacent interior tips of Cracks get coalesced. To arrest the Crack from further Opening normal cohesive variable stress distribution is applied on the rims of the plastic zones. Closed form analytic expressions are obtained for load bearing capacity and Crack Opening Displacement (COD). An illustrative case is discussed to study the behavior of load bearing capacity and Crack Opening Displacement with respect to affecting parameters viz. Crack length, plastic zone length and inter Crack distance between the two Cracks. Results obtained are reported graphically and analyzed.

R R Bhargava - One of the best experts on this subject based on the ideXlab platform.

  • Crack Opening Displacement for two unequal straight Cracks with coalesced plastic zones a modified dugdale model
    Applied Mathematical Modelling, 2011
    Co-Authors: R R Bhargava, S Hasan
    Abstract:

    Abstract The problem investigated is of an infinite plate weakened by two collinear unequal hairline straight quasi-static Cracks. Uniform constant tension is applied at infinity in a direction perpendicular to the rims of the Cracks. Consequently the rims of the Cracks open in Mode I type deformation. The tension at infinity is increased to the limit such that the plastic zones developed at the two adjacent interior tips of Cracks get coalesced. To arrest the Crack from further Opening normal cohesive variable stress distribution is applied on the rims of the plastic zones. Closed form analytic expressions are obtained for load bearing capacity and Crack Opening Displacement (COD). An illustrative case is discussed to study the behavior of load bearing capacity and Crack Opening Displacement with respect to affecting parameters viz. Crack length, plastic zone length and inter Crack distance between the two Cracks. Results obtained are reported graphically and analyzed.

  • Crack Opening Displacement for two unequal straight Cracks with coalesced plastic zones – A modified Dugdale model
    Applied Mathematical Modelling, 2011
    Co-Authors: R R Bhargava, S Hasan
    Abstract:

    Abstract The problem investigated is of an infinite plate weakened by two collinear unequal hairline straight quasi-static Cracks. Uniform constant tension is applied at infinity in a direction perpendicular to the rims of the Cracks. Consequently the rims of the Cracks open in Mode I type deformation. The tension at infinity is increased to the limit such that the plastic zones developed at the two adjacent interior tips of Cracks get coalesced. To arrest the Crack from further Opening normal cohesive variable stress distribution is applied on the rims of the plastic zones. Closed form analytic expressions are obtained for load bearing capacity and Crack Opening Displacement (COD). An illustrative case is discussed to study the behavior of load bearing capacity and Crack Opening Displacement with respect to affecting parameters viz. Crack length, plastic zone length and inter Crack distance between the two Cracks. Results obtained are reported graphically and analyzed.

Jurgen Rodel - One of the best experts on this subject based on the ideXlab platform.

  • correlation between long and short Crack r curves in alumina using the Crack Opening Displacement and fracture mechanical weight function approach
    Journal of the American Ceramic Society, 1996
    Co-Authors: Theo Fett, Dietrich Munz, Jurgen Seidel, Martin Stech, Jurgen Rodel
    Abstract:

    Both fine grain sized and coarse grain sized alumina has been used as a model material to correlate short Crack R-curves by the surface-flaw-in-flexure method with long Crack R-curves from a compact tension specimen. The analysis has been made using the Crack Opening Displacement from long Cracks combined with the appropriate weight function to compute the Crack closure stresses by Crack bridging as a function of Crack Opening Displacement. Then the long Crack R-curve, the short Crack curve, as well as the Crack Opening Displacement for short Cracks are computed. The agreement with the experimental data is within an absolute value of about 0.3 MPa {radical}m and attributed to uncertainties in determining the Crack tip toughness and effects due to subcritical Crack growth.

Figen Kaya - One of the best experts on this subject based on the ideXlab platform.

  • effect of increased interfacial strength on the fatigue Crack growth resistance and Crack Opening Displacement of β ti21s scs 6 composites
    Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2008
    Co-Authors: Figen Kaya, P Bowen
    Abstract:

    Abstract Fatigue Crack growth resistance of metastable β titanium composite was investigated in different heat treatment conditions. The effects of increased interfacial strength due to peak ageing on the fatigue Crack growth, Crack Opening Displacement and fibre bridging were examined and results of fibre fractures monitored by acoustic emission and fibre push back tests were correlated with fatigue Crack growth and Crack Opening behaviour of the composites. It is shown that at maximum applied intensity factor values higher than Crack arrest/catastrophic failure transition, peak ageing reduces the fatigue Crack growth resistance of composite due to higher number of fibre fractures which occurs as fibre stress is increased due to increased interfacial shear stress. However, below transition heat treated composite shows better Crack growth resistance compared to as-received condition under fixed K max,ini values. This favourable effect of increased interfacial strength on the Crack growth behaviour is prominent in the composites with smaller initial unbridged defect size.

  • In-situ observation of Crack Opening Displacement (COD) in a metastable β titanium composite
    Journal of Materials Science, 2007
    Co-Authors: Figen Kaya, Paul Bowen, Jun Liu
    Abstract:

    The interfacial strength of β-Ti composites was increased via ageing, to investigate the effects of interfacial strength on the Crack Opening. Prior to Crack Opening Displacement (COD) measurements, the number and location of fractured fibres were identified by acoustic emission and fibre probing techniques. This was later used to model the Crack Opening for number of tests conditions, such as different values of applied stress intensity factor, interfacial strengths and test temperatures. COD measurements were performed on bridged Cracks, which were obtained by cycling the specimens under tension–tension loading. Test results have shown that Crack Opening is affected by both intrinsic factors such as interfacial debonding and frictional sliding stresses and extrinsic factors such as the maximum applied stress intensity factor and test temperature.