Fiber Suppressed Localization in Tension
Tensile fracture in portland cement based fiber composites is studied. Formation and propagation of stable microcracks is examined by means of holographic interferometry. Distributed microcracking...
Integrity Testing of Concrete Elements Using Surface Waves
The Spectral Analysis of Surface Waves (SASW) method is a nondestructive testing procedure which has been extensively used to determine in situ the elastic moduli of soils and pavements...
Microcrack Interaction Toughening in Ceramics and CMCs
The generation of microcracks, which causes an extension of the damage zone at values of stress intensity factor, K, below the expected critical level represented by KIC...
Strength and Fracture of Glass in the Lunar Environment
Due to the lack of water on the moon, the effects of hydrolytic depolymerization - stress corrosion cracking - will be nonexistent in glasses produced and used on the moon. This would...
A Stochastic Model for Crack Initiation and Fatigue Life
A stochastic theory of high cycle fatigue life is based on a combination of the theory of diffusion in the presence of a stress field with activated state theory. The result is expressed...
Inspection Planning for Surface Fatigue Cracks
A reliability based method for planning of inspections to detect surface fatigue cracks is presented. Cracks are described as semi-elliptical surface cracks. The conditions governing fatigue...
Some Remarks on BK-Models for Fatigue Crack Growth
The choice of a model parameter for concentrating the entire uncertainties of a constant load amplitude fatigue crack growth process is shown to be sufficient when reproducing the first...
A Stochastic Approach to the Fatigue Reliability
In this paper, the stochastic approach, which combines the mixed boundary integral equation method (Lua et al (1992a)) with the First Order Reliability Method (FORM), is applied to study...
Low-Cycle Fatigue Prediction for Ramberg-Osgood Type Materials
The prediction of low-cycle fatigue crack growth is successfully made by an equation employing the J-integral range. This equation, originally proposed by Dowling and Begley, is analogous...
Experimental Validation of a Probabilistic Fracture Mechanics Model
A method is developed for validating a probabilistic fracture analysis code (PROFRANC). The method is based on classical statistical techniques and experimental data. It is shown that...
A New Probabilistic Model for the Fracture Toughness of Concrete
Scatter of strength and toughness parameters as well as scale effect are often observed in brittle materials such as concrete. The recently developed Crack Diffusion Model is utilized....
Pavement Surface Maintenance: Overview of SHRP H-106 Experimental Installations
The Strategic Highway Research Program (SHRP) is currently conducting an experiment under SHRP project H-106 to evaluate the performance of various materials and procedures used in making...
Performance of Epoxy-Coated Steel in Continuously Reinforced Concrete Pavement
Two sections of interstate highway in central Oklahoma were recently reconstructed. On both projects, northbound lanes were reinforced with epoxy-coated steel and southbound lanes were...
River Ice Cover Cracking for Various Boundary Conditions
The breakup of river ice covers is commonly initiated by the formation of cracks parallel to river banks. These cracks usually result from a change in the water level due to a rapid rising...
Microstructure and Mechanical Behaviour of Ice
Short descriptions are given for ice in nature, test methods used to evaluate their deformation behaviour and, a general microstructure-based constitutive equation. Equations suitable...
Fracture Resistance to Cracking in Ice: Initiation and Growth
The issue of notch sensitivity and brittleness of the test failure is used to forecast the necessary specimen size for a material property initiation toughness; a methodology is developed...
Size Effects in the Fracture of Quasi-Brittle Materials
Causes and influences of the structural size effect that is exhibited by materials such as concrete, mortar, ice rock and ceramics, are discussed. The size effect law, which models this...
Some Questions on Fracture Mechanics of Ice and Ice Covers
Investigation of natural processes of deformation and fracture of ice covers, and processes of its interaction with icebreaker or ice-resistant structures requires as a rule considerations...
Recirculation Piping Replacement Project at Dresden Unit 3
This paper discusses the Recirculation Piping Replacement Project performed at Dresden Unit 3 during 1985 and 1986. It describes several of the technical and administrative problems associated...
The Boundary Element Method in Engineering Practice
The boundary element method (BEM) provides an excellent basis for the development of integrated design and analysis systems. The technique possesses the advantages of simple model generation,...
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