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Characterisation of rutting in unbound granular material of airfield pavements using time-dependent modified Drucker–Prager cap model.

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Title: Characterisation of rutting in unbound granular material of airfield pavements using time-dependent modified Drucker–Prager cap model.
Authors: Rahmani, Mohammad1 (AUTHOR) yong-rak.kim@tamu.edu, Kim, Yong-Rak1 (AUTHOR), Little, Dallas N.1 (AUTHOR), Rushing, John F.2 (AUTHOR)
Source: International Journal of Pavement Engineering. Dec2025, Vol. 26 Issue 1, p1-18. 18p.
Subjects: Pavements, Pavement design & construction, Deformations (Mechanics), Finite element method, Material plasticity, Granular materials
Abstract: This study presents a mechanistic model simulation of rutting behaviour in the granular layers of airfield pavements using the time-dependent modified Drucker-Prager Cap (MDPC) model. The time-dependent MDPC is hypothesized as a constitutive model for predicting plastic deformation of granular materials with hardening compression. An efficient inverse optimisation approach is developed, integrating finite element analysis results with full-scale test data from a simulated airfield pavement exhibiting significant rutting in unbound layers. The algorithm calibrates the MDPC model to characterise permanent deformation in the granular base layer. Rutting data were obtained from the US Army Engineer Research and Development Centre (ERDC) full-scale tests. Results show that (1) the time-dependent MDPC model effectively predicts plastic deformation in pavement granular layers; (2) low cohesion values cause premature shear failure, low cap aspect ratios lead to early rutting saturation, and hardening parameters strongly influence rutting magnitude; and (3) the model's creep mechanism allows for characterising densification of material due to aggregate rearrangements under cyclic loading. This modelling and optimisation approach effectively identifies key material parameters governing permanent deformation in airfield pavements under repeated loading, providing valuable insights for advancement of pavement design and maintenance strategies for heavy-duty highways and airfields. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Pavement Engineering is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 190411350
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Characterisation of rutting in unbound granular material of airfield pavements using time-dependent modified Drucker–Prager cap model.
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  Data: <searchLink fieldCode="AR" term="%22Rahmani%2C+Mohammad%22">Rahmani, Mohammad</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yong-rak.kim@tamu.edu</i><br /><searchLink fieldCode="AR" term="%22Kim%2C+Yong-Rak%22">Kim, Yong-Rak</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Little%2C+Dallas+N%2E%22">Little, Dallas N.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rushing%2C+John+F%2E%22">Rushing, John F.</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Pavement+Engineering%22">International Journal of Pavement Engineering</searchLink>. Dec2025, Vol. 26 Issue 1, p1-18. 18p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Pavements%22">Pavements</searchLink><br /><searchLink fieldCode="DE" term="%22Pavement+design+%26+construction%22">Pavement design & construction</searchLink><br /><searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink><br /><searchLink fieldCode="DE" term="%22Material+plasticity%22">Material plasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Granular+materials%22">Granular materials</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study presents a mechanistic model simulation of rutting behaviour in the granular layers of airfield pavements using the time-dependent modified Drucker-Prager Cap (MDPC) model. The time-dependent MDPC is hypothesized as a constitutive model for predicting plastic deformation of granular materials with hardening compression. An efficient inverse optimisation approach is developed, integrating finite element analysis results with full-scale test data from a simulated airfield pavement exhibiting significant rutting in unbound layers. The algorithm calibrates the MDPC model to characterise permanent deformation in the granular base layer. Rutting data were obtained from the US Army Engineer Research and Development Centre (ERDC) full-scale tests. Results show that (1) the time-dependent MDPC model effectively predicts plastic deformation in pavement granular layers; (2) low cohesion values cause premature shear failure, low cap aspect ratios lead to early rutting saturation, and hardening parameters strongly influence rutting magnitude; and (3) the model's creep mechanism allows for characterising densification of material due to aggregate rearrangements under cyclic loading. This modelling and optimisation approach effectively identifies key material parameters governing permanent deformation in airfield pavements under repeated loading, providing valuable insights for advancement of pavement design and maintenance strategies for heavy-duty highways and airfields. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Pavement Engineering is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/10298436.2025.2531188
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      – Code: eng
        Text: English
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        PageCount: 18
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        Type: general
      – SubjectFull: Pavement design & construction
        Type: general
      – SubjectFull: Deformations (Mechanics)
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      – SubjectFull: Finite element method
        Type: general
      – SubjectFull: Material plasticity
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      – SubjectFull: Granular materials
        Type: general
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      – TitleFull: Characterisation of rutting in unbound granular material of airfield pavements using time-dependent modified Drucker–Prager cap model.
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            NameFull: Rahmani, Mohammad
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            NameFull: Kim, Yong-Rak
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            NameFull: Little, Dallas N.
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            – D: 01
              M: 12
              Text: Dec2025
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              Y: 2025
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