Discrete modeling of short-fiber reinforcement in cementitious composites

Bolander, John E.; Saito, Shingo

doi:10.1016/s1065-7355(97)90014-6

Cited by 68 publications

(29 citation statements)

References 9 publications

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“…The rigid elements are typically of circular or spherical shape due to the simplicity and speed of the contact detection algorithm. However, several researchers have applied the method using elements of polygonal shape (Heuze et al 1993;Kun and Herrmann 1996;Bolander and Saito 1997;Camborde et al 2000;Prochazka 2004). …”

Section: Overview Of the Discrete Element Methods (Dem)mentioning

confidence: 99%

Discrete Element Method for Modeling Penetration

Tavarez

Plesha

2004

Problems Involving Thermal Hydraulics, Liquid Sloshing, and Extreme Loads on Structures

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of Information. SPONSORING I MONITORING AGENCY NAME(S) AND ADDRESS(ES) SPONSORIMONITOR'S ACRONYM(S), DISTRIBUTION /AVAILABILITY STATEMENTUnclassified -Unlimmeted distribution. SUPPLEMENTARY NOTES ABSTRACTThis research resulted in the development of the Discrete Element Method (DEM) as a general, robust, and scalable computer technique for unified modeling of the mechanical behavior of solid and particulate materials, including the transition from solid phase to particulate phase. Applications include gross damage of structures due to extreme load events, and high speed penetration of structures, involving materials such as concrete, rock, and novel combinations of these.This computer approach is useful for assessing vulnerability of military and civilian facilities such as nuclear power reactors, transportation facilities, buildings, and so on, and for assessing efficacy of military operations involving such structures.One of the primary accomplishments of this research is the development of interelement potentials for the DEM method such that accurate and convergent results are obtained. This research resulted in the development of the Discrete Element Method (DEM) as a general, robust, and scalable computer technique for unified modeling of the mechanical behavior of solid and particulate materials, including the transition from solid phase to particulate phase. Applications include gross damage of structures due to extreme load events, and high speed penetration of structures, involving materials such as concrete, rock, and novel combinations of these. This computer approach is useful for assessing vulnerability of military and civilian facilities such as nuclear power reactors, transportation facilities, buildings, and so on, and for assessing efficacy of military operations involving such structures. One of the primary accomplishments of this research is the development of interelement potentials for the DEM method such that accurate and convergent results are obtained. SUBJECT

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Section: Overview Of the Discrete Element Methods (Dem)mentioning

confidence: 99%

Discrete Element Method for Modeling Penetration

Tavarez

Plesha

2004

Problems Involving Thermal Hydraulics, Liquid Sloshing, and Extreme Loads on Structures

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“…The strength and stiffness contributions of each individual fiber are explicitly represented within the model, without increasing the number of system degrees of freedom [1]. A fiber element is constructed at each point of intersection of a fiber with a Voronoi facet of the background mesh representing the matrix.…”

Section: Fiber Reinforcementmentioning

confidence: 99%

“…Nonuniform fiber dispersion, particularly in large volume applications of SHCC, may hinder the desired strain-hardening and related properties. Such research needs have motivated the development of computational models that explicitly represent fibers within the composite material [1][2][3][4][5][6][7][8][9]. The ability to model individual fibers, and their collective influence on composite behavior, enables: 1) direct representation of the effects of fiber dispersion; and 2) multiscale description of fiber-local behavior, as it affects composite performance.…”

Section: Introductionmentioning

confidence: 99%

Spatial representation of fiber bridging forces in strain-hardening cement composites

Kang¹,

Bolander²

2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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Abstract. This research involves the development of lattice models of strain-hardening cement composites (SHCC), in which the individual fibers are explicitly represented. The pullout forces of fibers are derived from micromechanical bases and distributed along the fiber embedment lengths. This spatial representation of the fiber bridging forces provides realistic representations of stress transfer between the fiber and matrix, which is essential for simulating crack openings and crack spacing in SHCC. Multiple cracking produces islands of material interconnected by fiber bridges, which places unusual demands on the solution procedure. A special event-by-event solution strategy is adopted for this reason.

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“…These works are very elegant and well posed; however the pre-known enrichment field is of difficult achievement when, for example, curved fibers are present. Readers are invited to consult the works Schlangen et al (1992); Bolander and Saito (1997); Liz et al, (2006) in which authors employ lattice strategy to model composites from micro-structures. Moreover, other approaches that adopt slip degrees of freedom to represent the fiber reinforced body can be found in Balakrishnan and Murray (1986); Désir et al (1999).…”

Section: Latin American Journal Of Solids and Structures 12 (2015) 58mentioning

confidence: 99%

Fiber-matrix Contact Stress Analysis for Elastic 2D Composite Solids

Paccola

Sampaio

Coda

2015

Lat. Am. j. solids struct.

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This paper presents a finite element formulation for the analysis of two dimensional reinforced elastic solids developing both small and large deformations without increasing the number of degrees of freedom. Fibers are spread inside the domain without the necessity of node coincidence. Contact stress analysis is carried out for both straight and curved elements via two different strategies. The first employs consistent differential relations and the second adopts a simple average calculation. The development of all equations is described along the paper. Numerical examples are employed to demonstrate the behavior of the proposed methodology and to compare the contact stress results for both calculations.

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Discrete modeling of short-fiber reinforcement in cementitious composites

Cited by 68 publications

References 9 publications

Discrete Element Method for Modeling Penetration

Discrete Element Method for Modeling Penetration

Spatial representation of fiber bridging forces in strain-hardening cement composites

Fiber-matrix Contact Stress Analysis for Elastic 2D Composite Solids

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