On the study of the effect of Lüders plateau on fracture response with cohesive zone model
| Autor: | Shengwen Tu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Mechanical Engineering medicine.medical_treatment 020101 civil engineering 02 engineering and technology Building and Construction Traction (orthopedics) Plateau (mathematics) 0201 civil engineering The arctic Stress (mechanics) Boundary layer Cohesive zone model 020303 mechanical engineering & transports 0203 mechanical engineering Ultimate tensile strength medicine Fracture (geology) Composite material Civil and Structural Engineering |
| Zdroj: | Thin-Walled Structures. 141:62-72 |
| ISSN: | 0263-8231 |
| DOI: | 10.1016/j.tws.2019.01.049 |
| Popis: | For materials presenting Luders plateau, low temperatures in the Arctic region will prolong the plateau length. In this study, the effect of Luders plateau on crack growth resistance has been investigated with cohesive zone model, bilinear traction-separation and the single edge notched tensile (SENT) specimens. The Luders plateau is simplified by keeping the plateau stress constant and equaling to the yield stress. A family of Luders plateau ranging from 0 to 0.1 are analyzed. Constraint analysis with the modified boundary layer (MBL) model shows that the introduction of the Luders plateau reduces crack tip constraint. Longer Luders plateau corresponds to larger reduction. Numerical results show that the effect of Luders plateau on crack growth resistance is insignificant when the cohesive energy is very small. With the increase of the cohesive energy, the effect of the Luders plateau on crack growth resistance are observed and material with longer Luders plateau yields higher resistance curve. In addition, effects of the crack depth and the maximum traction stress on the resistance curves are also briefly discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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