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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Stress-Strain Response of Microcracked Concrete in Direct Tension
Author(s): Farhad Ansari
Publication: Materials Journal
Appears on pages(s): 481-490
Keywords: concretes; cracking (fracturing); crack width and spacing; deformation; lasers; measurement; microcracking; mechanical properties; stress-strain relationships; tensile strength; Materials Research
Abstract:Behavior of concrete subjected to uniaxial tension is studied by laser speckle interferometry. The main emphasis is given to development of a technique for detection of microcracks, measurements of the width of microcracking zone, and calculating microcrack growth. Microcrack-macrocrack evolution is described from experimental results. Unique post-peak stress-strain and stress-deformation behavior were not observed. The stress-strain response of concrete was found to be gage-length dependent. Strains measured within a gage length inside the microcracking zone were two orders of magnitude higher than the values measured previously.
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