Inverse analysis of traction-separation relationship based on sequentially linear approach

Vorel, Jan; Kabele, Petr

doi:10.1016/j.compstruc.2018.10.005

Cited by 20 publications

(7 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, accounting for toughening mechanisms at the microscale was not undertaken in this work [ 31 , 32 ] and is left for further developments. Future work may also involve refining the TSL by either further optimizing the softening function or by using an established inverse method to fit a TSL to experimental data [ 33 ]. Our simulations also do not account for complex phenomena such as the occurrence of modes of plastic deformation, crack tip-blunting, and explicit dependencies on both crack tip position and velocity.…”

Section: Discussionmentioning

confidence: 99%

Modeling Brittle Fractures in Epoxy Nanocomposites Using Extended Finite Element and Cohesive Zone Surface Methods

et al. 2021

View full text Add to dashboard Cite

Linear elastic fracture modeling coupled with empirical material tensile data result in good quantitative agreement with the experimental determination of mode I fracture for both brittle and toughened epoxy nanocomposites. The nanocomposites are comprised of diglycidyl ether of bisphenol A cured with Jeffamine D-230 and some were filled with core-shell rubber nanoparticles of varying concentrations. The quasi-static single-edge notched bending (SENB) test is modeled using both the surface-based cohesive zone (CZS) and extended finite element methods (XFEM) implemented in the Abaqus software. For each material considered, the critical load predicted by the simulated SENB test is used to calculate the mode I fracture toughness. Damage initiates in these models when nodes at the simulated crack tip attain the experimentally measured yield stress. Prediction of fracture processes using a generalized truncated linear traction–separation law (TSL) was significantly improved by considering the case of a linear softening function. There are no adjustable parameters in the XFEM model. The CZS model requires only optimization of the element displacement at the fracture parameter. Thus, these continuum methods describe these materials in mode I fracture with a minimum number of independent parameters.

show abstract

Section: Discussionmentioning

confidence: 99%

Modeling Brittle Fractures in Epoxy Nanocomposites Using Extended Finite Element and Cohesive Zone Surface Methods

et al. 2021

View full text Add to dashboard Cite

show abstract

“…However, accounting for toughening mechanisms at the microscale was not undertaken in this work [31,32] and is left for further developments. Future work may also involve refining the TSL used by either further optimizing the softening function or using an established inverse method to fit a TSL to experimental data [33]. Our simulations also do not account for complex phenomena such as the occurrence of modes of plastic deformation, crack tip blunting, and explicit dependencies on crack tip position and velocity.…”

Section: Discussionmentioning

confidence: 99%

Modeling Brittle Fracture in Epoxy Nanocomposites using Extended Finite Element and Cohesive Zone Surface Methods

Biswakarma¹,

Cruz²,

Bain³

et al. 2021

Preprint

View full text Add to dashboard Cite

Linear elastic fracture modeling coupled with empirical material tension data result in good quantitative agreement with experimental measurements of fracture failure for both brittle and tough epoxy nanocomposites. The nanocomposites comprise diglycidyl ethers of bisphenol A cured with O,O’ bis (2-aminopropylpropylene glycol) (Jeffamine D230) and doped with rubber nanoparticles of varying concentrations. Toughness, critical load, and critical displacement in quasi-static single edge-notched three-point bending are predicted accurately using both surface-based cohesive zone (CZS) and extended finite element (XFEM) methods implemented in Abaqus software. Fracture initiation within a crack is taken at the yield stress from uniaxial tension data. Prediction of fracture processes using a generalized truncated linear traction-separation law was significantly improved by considering the case of a linear softening function. There are no adjustable parameters in the XFEM model. The CZS model requires only optimization of the element displacement at fracture parameter. Thus, these continuum methods describe these materials in mode I fracture with a minimum number of independent parameters.

show abstract

“…The majority of these models consider the contribution of fiber-reinforcement mechanisms through a cohesive traction-separation law obtained from semiempirical recommendations, or from experimental results, either directly or from inverse analysis (IA). 44 However, there is still considerable uncertainty regarding the most adequate methodology to derive the values of the model parameters for analyzing a given structure. An inadequate assessment of these values provides results without any representativeness of the real behavior of the structure.…”

Section: Numerical Approaches For Modeling the Behavior Of Frc Structuresmentioning

confidence: 99%

Blind competition on the numerical simulation of steel‐fiber‐reinforced concrete beams failing in shear

Barros

Sanz

Kabele

et al. 2020

Structural Concrete

Self Cite

View full text Add to dashboard Cite

Experimental research has shown the extraordinary potential of the addition of short fibers to cement-based materials by improving significantly the behavior of concrete structures for serviceability and ultimate limit states. Software based on the finite element method has been used for the simulation of the material nonlinear behavior of fiber-reinforced concrete (FRC) structures. The applicability of the existing approaches has often been assessed by simulating experimental tests with structural elements, in general of a small scale, where the parameter values of the material constitutive laws are adjusted for the aimed predicting level, which constitutes an inverse technique of arguable Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors' closure, if any, approximately nine months after the print publication.

show abstract

Inverse analysis of traction-separation relationship based on sequentially linear approach

Cited by 20 publications

References 26 publications

Modeling Brittle Fractures in Epoxy Nanocomposites Using Extended Finite Element and Cohesive Zone Surface Methods

Modeling Brittle Fractures in Epoxy Nanocomposites Using Extended Finite Element and Cohesive Zone Surface Methods

Modeling Brittle Fracture in Epoxy Nanocomposites using Extended Finite Element and Cohesive Zone Surface Methods

Blind competition on the numerical simulation of steel‐fiber‐reinforced concrete beams failing in shear

Contact Info

Product

Resources

About