D. Lange-Kornbak
University of Sydney
Ultimate tensile strengthNonlinear programmingSoftening pointEngineeringRule of mixturesBrittlenessOptimization problemDeformation (engineering)Round robin testNonlinear systemComposite materialFlexural strengthGeotechnical engineeringShear strengthMaterials scienceStrength of materialsTension (physics)Superposition principleBoundary frictionCharacteristic lengthFiber-reinforced concreteSofteningHollow cylinderReinforced concreteCompressive strengthEngineering design processMicromechanicsHullComputer scienceDirect shear testFracture (geology)Elastic modulusAggregate (composite)Solid mechanicsFiberCrackingFracture mechanicsDuctilityStructural engineeringAdhesiveFracture toughness
Publications 8
This paper will demonstrate how rigorous mathematical programming techniques can be employed in the design of fibre-reinforced concrete mixes which have both high tensile strength and high ductility. For this it is necessary to know how the microstructural parameters of a mix influence its macroscopic behaviour. The microstructural-macroscopic relationships are reviewed, and the corresponding optimization problem formulated and solved by nonlinear mathematical programming.
#2D. Lange-KornbakH-Index: 5
ABSTRACT Experimental observations are compared with approximate nonlinear fracture mechanical predictions of the ultimate capacity of three-point bend, singly-reinforced concrete beams without shear reinforcement. The superposition model is found to provide a better estimate of the shear strength in diagonal tension failure than the size effect model. Moreover, Carpinteri’s model based on a transitional brittleness number, a zero crack opening condition ( δ = 0) and a fracture toughness account...
#1D. Lange-Kornbak (USYD: University of Sydney)H-Index: 5
#2Bhushan Lal Karihaloo (Cardiff University)H-Index: 56
Abstract The limitations of the traditional material design approach in driving properties to extreme values and handling multiple design criteria and variables can be overcome by applying the optimization approach. Fiber-reinforced cement based composites based on strong aggregates and exhibiting approximately bilinear fiber pullout behavior are optimized in the present study for a given compressive strength f′c with a view to maximizing their uniaxial tensile strength f′t and fracture energy G...
#1J.G.M. van Mier (TU Delft: Delft University of Technology)H-Index: 21
#2Surendra P. ShahH-Index: 116
Last. D. Zissopoulos (ICL: Imperial College London)H-Index: 1
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0025-5432/97 © RILEM tory cast its own specimens following a prescribed recipe. The pre-peak behaviour was found to be independent of specimen slenderness when low friction loading platens were used. However, for all loading systems a strong increase of (post-peak) ductility was found with decreasing specimen slenderness. Analysis of the results, and comparison with data from literature, showed that irrespective of the loading system used, a perfect localization of deformations occured in the po...
#1D. Lange-Kornbak (USYD: University of Sydney)H-Index: 5
#2Bhushan Lal Karihaloo (AAU: Aalborg University)H-Index: 56
Abstract The complete tension softening behaviour of short-fibre-reinforced cementitious composites which exhibit extensive matrix cracking is established by combining a fracture mechanical approach for bridged, discontinuous cracks with a statistical approach for a bridged, through-crack via consistent relationships for the bridging stress. These relationships account for adhesive and frictional bonding of fibres along a crack and are capable of accommodating the effects of fibre content and pr...
#1D. Lange-Kornbak (USYD: University of Sydney)H-Index: 5
#2Bhushan Lal Karihaloo (USYD: University of Sydney)H-Index: 56
Abstract Designers of concrete mixes are often faced with competing requirements such as high strength and high ductility and have to rely on empirical and heuristic approaches. In the present study, this is overcome by incorporating the characteristic length 1ch and the brittleness number B into the design criteria and using well-established, mostly nonempirical, formulae relating the effective properties (elastic modulus, tensile strength, and fracture energy) to the microstructural parameters...
#1Timothy B. Reardon (UT: University of Tennessee)H-Index: 1
#2Eric C. Drumm (UT: University of Tennessee)H-Index: 17
Last. D. Lange-Kornbak (UT: University of Tennessee)H-Index: 5
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