List of Journal Publications
2019
2.
Goudarzi, M., Simone, A.
Fiber neutrality in fiber-reinforced composites: Evidence from a computational study Journal Article
In: INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, vol. 156-157, pp. 14–28, 2019.
Abstract | BibTeX | Tags: Embedded reinforcement, Fiber neutrality, Fiber-reinforced composites | Links:
@article{Goudarzi2019,
title = {Fiber neutrality in fiber-reinforced composites: Evidence from a computational study},
author = {M. Goudarzi and A. Simone},
doi = {10.1016/j.ijsolstr.2018.07.023},
year = {2019},
date = {2019-01-01},
journal = {INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES},
volume = {156-157},
pages = {14–28},
publisher = {Elsevier Ltd},
abstract = {We report numerical evidence for neutrality of thin fibers to a prescribed uniform stress field in a fiber-reinforced composite. Elastic finite element analyses of fiber-reinforced composites are carried out with a conventional fully-resolved model and a novel dimensionally-reduced fiber model.The two modeling approaches are compared in the analysis of mechanical properties and matrix-fiber slip profiles. An analysis of the effectiveness of various fiber orientations with respect to the loading direction shows that the notion of inclusion neutrality, originally formulated for rigid line inclusions by Wang et al. [Journal of Applied Mechanics, 52(4), 814–822, 1985], holds also for linear elastic thin fibers with imperfect interface.},
keywords = {Embedded reinforcement, Fiber neutrality, Fiber-reinforced composites},
pubstate = {published},
tppubtype = {article}
}
We report numerical evidence for neutrality of thin fibers to a prescribed uniform stress field in a fiber-reinforced composite. Elastic finite element analyses of fiber-reinforced composites are carried out with a conventional fully-resolved model and a novel dimensionally-reduced fiber model.The two modeling approaches are compared in the analysis of mechanical properties and matrix-fiber slip profiles. An analysis of the effectiveness of various fiber orientations with respect to the loading direction shows that the notion of inclusion neutrality, originally formulated for rigid line inclusions by Wang et al. [Journal of Applied Mechanics, 52(4), 814–822, 1985], holds also for linear elastic thin fibers with imperfect interface.
1.
Goudarzi, M., Simone, A.
Discrete inclusion models for reinforced composites: Comparative performance analysis and modeling challenges Journal Article
In: COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, vol. 355, pp. 535–557, 2019.
Abstract | BibTeX | Tags: Embedded reinforcement, Fiber-reinforced composite, Non-smooth slip profile, Platelet inclusion | Links:
@article{Goudarzi2019a,
title = {Discrete inclusion models for reinforced composites: Comparative performance analysis and modeling challenges},
author = {M. Goudarzi and A. Simone},
doi = {10.1016/j.cma.2019.06.026},
year = {2019},
date = {2019-01-01},
journal = {COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING},
volume = {355},
pages = {535–557},
publisher = {Elsevier B.V.},
abstract = {We report the results of a comparative analysis of mesh independent discrete inclusion models and point out some shortcomings of classical approaches in the approximation of the strain field across an inclusion (artificial continuity) and the slip profile along an inclusion (oscillatory behavior). We also present novel embedded reinforcement models based on partition of unity enrichment strategies, adaptive h-refinement, and order/regularity extensions. These novel models are assessed by means of mesh convergence studies and it is shown that they improve the quality of the solution by significantly decreasing local spurious oscillations in the slip profile along an inclusion.},
keywords = {Embedded reinforcement, Fiber-reinforced composite, Non-smooth slip profile, Platelet inclusion},
pubstate = {published},
tppubtype = {article}
}
We report the results of a comparative analysis of mesh independent discrete inclusion models and point out some shortcomings of classical approaches in the approximation of the strain field across an inclusion (artificial continuity) and the slip profile along an inclusion (oscillatory behavior). We also present novel embedded reinforcement models based on partition of unity enrichment strategies, adaptive h-refinement, and order/regularity extensions. These novel models are assessed by means of mesh convergence studies and it is shown that they improve the quality of the solution by significantly decreasing local spurious oscillations in the slip profile along an inclusion.
