Abstract
Different strength mismatched laboratory specimens that contain the compact tension (CT), single edge-notched tensile (SENT), and central-cracked tension (CCT) specimens with various specimen geometries, loading configurations, and initial cracks were selected to investigate the effect range of the material constraint systematically. The results showed that the effect range of material constraint exists in all the strength mismatched specimens and structures. The numerical value of the effect range is influenced by the geometry constraint. The high geometry constraint reduces the effect range of material constraint. When a material is located outside the effect range of material constraint, the fracture resistance curves and crack propagation paths of the specimens and structures are no longer influenced by the mechanical properties of the material. In addition, an interaction exists between the geometry constraint and material constraint. The high geometry constraint strengthens the effect of material constraint, whereas the fracture resistance curve and crack propagation path are insensitive to the material constraint under the low geometry constraint. The results in this study may provide scientific support for the structure integrity assessment and the design of strength mismatched structures.
Highlights
Constraint is the resistance of a specimen or structure against plastic deformation
When a material located outside the effect range of material constraint, the fracture resistance curves, and crack propagation paths of the specimens and structures are no longer influenced by the mechanical properties of the material
Irrespective of the geometries and loading configurations, the center crack or interface crack, the shallow crack or deep crack, the effect range of material constraint exists in all the strength mismatched specimens and structures
Summary
Constraint is the resistance of a specimen or structure against plastic deformation. It contains geometry constraint and material constraint. The geometry constraint is affected by the dimension of specimen, whereas the material constraint is affected by the strength mismatch between different materials. Both of them can affect the fracture behavior of the material significantly. Some parameters were established to characterize the material constraint. Yang et al [5,6,7] proposed a unified constraint parameter Ap which can characterize both material constraint and geometry constraint
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
