Method for Determination of Tensile Properties of ECC - II: Inverse Analysis and Experimental Results

Title: Method for Determination of Tensile Properties of ECC - II: Inverse Analysis and Experimental Results
Author(s): L. Østergaard, R. Walter, J. F. Olesen
Paper category : conference
Book title: International RILEM Workshop on High Performance Fiber Reinforced Cementitious Composites in Structural Applications
Editor(s): G. Fischer and V. C. Li
Print-ISBN: 2-912143-93-4
e-ISBN: 2912143942
Publisher: RILEM Publications SARL
Publication year: 2006
Pages: 57 - 64
Total Pages: 8
Nb references: 4
Language: English

Abstract: Today, Engineered Cementitious Composites (ECCs) have been developed to a stage where the material is being used in field testing and limited full scale constructed facilities. However, the lack of reliable, practical, standardized test methods for determination of the strain hardening properties of the material constitutes a significant obstacle for day-to-day structural engineering design and material quality control. In practice a simple and robust test method is required on a construction site. The uniaxial tension test (UTT) is regarded too complicated to serve as such. Instead, the widely adopted four point bending test (FPBT) may be used for this purpose, provided that an appropriate interpretation of the test data is available.
This paper, together with a companion paper, presents a contribution in that direction. Here, the results obtained in paper I are employed to develop an inverse method for determination of the ?-? properties from the FPBT load-deflection curve. The method is verified using FEM and the inverse analysis almost reproduces the constitutive FEM input. Furthermore, it is concluded that local minima are nonexistent, thus ensuring that the method is robust and reliable. Experimental FPBT load deflection curves are analyzed and it is shown that testing different beam geometries yield identical strain hardening material behavior by inverse analysis.

Online publication: 2005-05-15
Classification: Standards for Materials and Testing
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143942.007