Determination of mixed-mode fracture characteristics due dynamic opening and in-plane shear cases

Abstract

This work analyses the material fracture problem due to mixed-mode: dynamic opening and in-plane shear cases. Fracture criterions are analysed and new regularities are established, that mixed-mode fracture can be determined using critical characteristics of fracture and toughness: shear modulus and Poison's ratio.Stress intensity factor dependence curves are determined due opening and in-plane shear cases with different angle of initial crack trajectory. The opening and inplane shear fracture influence ratio is set.

Mechanical properties and cyclic fracture behavior of differently heat-treated steel

“…Larger and deeper material destructions, wider dimples are caused by non-metallic inclusions between grains of different size. Fractured views of tension specimens, CT and Charpy specimens (macro-and micromechanisms of failure of specimens cut of the CCM roll surface with crack-like defects [10,11]) are compared with material microstructure, described by different sized and shaped crystals of ferrite and pearlite, various inhomogeneities effecting static, dynamic and cyclic fracture. Insignificant change of chemical content, heattreatment allowed to obtain materials usable for structural elements with different functionality.…”