Cohesive frictional-contact model for dynamic fracture simulations under compression

Hyunil Baek, Kyoungsoo Park

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study, a cohesive frictional-contact model is developed by integrating the cohesive zone model and the frictional-contact model to predict fracture behaviors under compression. In the cohesive zone model, a potential-based model, named as the PPR model, is employed to define the traction-separation relation. A frictional force is approximated using a Coulomb frictional model, which accounts for a stick/slip condition. A normal contact force is estimated by employing a penalty method. In order to evaluate stable normal contact forces, penalty parameters are defined by introducing non-dimensional contact parameters. This leads to less sensitive error of contact pressure with respect to the change in material properties and time increments. Furthermore, an example of an earthquake rupture and masonry shear tests under compression are simulated using the proposed framework. The computational results demonstrate that the cohesive frictional-contact model reproduces slip-weakening behaviors along a fault plane and captures experimental shear stress-slip relations according to the change in compressive stress on the fracture surface.

Original languageEnglish
Pages (from-to)86-99
Number of pages14
JournalInternational Journal of Solids and Structures
Volume144-145
DOIs
Publication statusPublished - 2018 Jul 1

Fingerprint

Dynamic Fracture
Frictional Contact
Compression
Cohesive Zone Model
Simulation
simulation
Contact Force
Slip
slip
penalties
Model
Contact
Masonry
Slip Condition
Stick-slip
Penalty Method
Rupture
Earthquake
Shear Stress
masonry

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

Cite this

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Cohesive frictional-contact model for dynamic fracture simulations under compression. / Baek, Hyunil; Park, Kyoungsoo.

In: International Journal of Solids and Structures, Vol. 144-145, 01.07.2018, p. 86-99.

Research output: Contribution to journalArticle

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AB - In this study, a cohesive frictional-contact model is developed by integrating the cohesive zone model and the frictional-contact model to predict fracture behaviors under compression. In the cohesive zone model, a potential-based model, named as the PPR model, is employed to define the traction-separation relation. A frictional force is approximated using a Coulomb frictional model, which accounts for a stick/slip condition. A normal contact force is estimated by employing a penalty method. In order to evaluate stable normal contact forces, penalty parameters are defined by introducing non-dimensional contact parameters. This leads to less sensitive error of contact pressure with respect to the change in material properties and time increments. Furthermore, an example of an earthquake rupture and masonry shear tests under compression are simulated using the proposed framework. The computational results demonstrate that the cohesive frictional-contact model reproduces slip-weakening behaviors along a fault plane and captures experimental shear stress-slip relations according to the change in compressive stress on the fracture surface.

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