Title:
Influence of the Loading History on Fracture Mechanics Parameters of Microconcrete: Effects of Low-Frequency Cyclic Loading
Author(s):
G. Pons, S. A. Ramoda, and J. C. Maso
Publication:
Materials Journal
Volume:
85
Issue:
5
Appears on pages(s):
341-346
Keywords:
beams (supports); bending; concretes; cracking (fracturing); crack propagation; creep properties; cyclic loads; ductility; energy; loads (forces); microconcretes; mortars (material); Materials Research
DOI:
10.14359/2240
Date:
9/1/1988
Abstract:
The concepts of fracture mechanics permit formulation of mathematical laws of crack propagation. Since the Griffith studies in 1920, this theory has been successfully applied to metallic materials. Its extension to concrete and mortar has held the attention of research workers for the last 10 years. This investigation shows the influence of loading history on the resistance to crack growth in concrete by means of fracture mechanics parameters: the strain energy release rate and the stress intensity factor. This experimental investigation relates to the behavior of plain microconcrete notched beams subjected to repeated or stationary flexural stresses. The damage and consolidation phenomena have been ascertained, and the evolution of the ductility has been analyzed.