Theoretical evaluation of fiber orientation and its effects on mechanical properties in Engineered Cementitious Composites (ECC) with various thicknesses

Engineered Cementitious Composites (ECC) are materials featuring strain-hardening behavior accompanied by formation of multiple cracks. The distribution of fiber orientation in ECC members is affected by member thickness due to the limited freedom of rotation for fibers near the surfaces. This paper first demonstrates how to acquire fiber orientation distributions for various member thicknesses from geometrical consideration. The distribution of fiber orientation is found to be between ideal 2D distribution and 3D distribution, so the tensile performance should be in between as well. Constitutive law for a single crack is computed based on obtained distributions. Stress-strain curves for tensile members are also simulated and compared with experimental results. This study reveals the theoretical effect of member thickness on ECC behavior. Compared to laboratory data obtained from small-size specimens, a thickness-dependent reduction factor for mechanical properties (mainly tensile strength and ductility) should be considered in the design of real structural members.

• Record URL:
  https://doi.org/10.1016/j.cemconres.2017.02.024
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S0008884616309802
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Supplemental Notes:
  • Abstract reprinted with permission from Elsevier.
• Authors:
  • Lu, Cong
  • Leung, Christopher K Y
• Publication Date: 2017-5

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: pp 240-246
• Serial:
  • Cement and Concrete Research
  • Volume: 95
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Deformation curve; Ductility; Mechanical properties; Structural members; Tensile strength; Thickness
• Uncontrolled Terms: Engineered cementitious composites; Fiber orientation
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 01634698
• Record Type: Publication
• Files: TRIS
• Created Date: May 15 2017 3:16PM