Rheological Model to Describe the Cyclic Load-Bearing Behaviour of Strain-Hardening Cement-Based Composites (SHCC).

Dominik Junger,Steffen Müller,Viktor Mechtcherine

doi:10.3390/ma14216444

Dominik Junger, Steffen Müller + Show 1 more

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https://doi.org/10.3390/ma14216444

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Journal: Materials	Publication Date: Oct 27, 2021
Citations: 1	License type: CC BY 4.0

Affiliation: TU Dresden

Abstract

The mechanical behaviour of strain-hardening cement-based composites (SHCC) under monotonic tensile loading has been the subject of research for many years. The recent research on the SHCC’s performance under cyclic loading has enabled the identification of a wide variety of damage phenomena different to those observed under monotonic loading. The article at hand first summarises the experimental evidence of such phenomena in the context of the material performance observed. On this basis, the mechanisms behind these phenomena are discussed and explained using rheological modelling.

Highlights

Comprise a group of micro mechanic-based building materials ment-based composites (ECC) comprise a group of micro mechanic-based building matedemonstrating outstanding mechanical properties whenwhen subjected to tensile loading rials demonstrating outstanding mechanical properties subjected to tensile loading
The macro-mechanical, deformation-controlled and load-controlled cyclic test, by Müller and Mechtcherine [7,14,16], performed under both pure tension and alternating regimes, revealed that strain-hardening cement-based cement-based composites composites (SHCC) is sensitive to alterations of the experimental settings such as strain increment per cycle or upper and lower reversal points
A much higher number of loading cycles can be sustained by SHCC, leading to different degradation processes

Summary

Introduction

IntroductionStrain-hardening (SHCC), alsoalso known as engineered cementStrain-hardeningcement-based cement-basedcomposites composites (SHCC), known as engineered cebased composites (ECC)comprise a group of micro mechanic-based building materials ment-based composites (ECC) comprise a group of micro mechanic-based building matedemonstrating outstanding mechanical properties whenwhen subjected to tensile loading [1,2].rials demonstrating outstanding mechanical properties subjected to tensile loadingBy adding specific high-performance microfibres, e.g., aramide.g., fibresaramid (ARA),fibres polybenzoxa[1,2].By adding specific high-performance microfibres,(ARA), zole fibres (as spun: PBO-AS; high PBO-AS; modulus:high PBO-HM)or high-density polyethylene fibres polybenzoxazole fibres (as spun: modulus: PBO-HM) or high-density pol(HDPE), enhancements the order of several percent be achieved in yethyleneconsiderable fibres (HDPE), considerableon enhancements on the order of can several percent can tensile strength and strain capacity [3,4]; see Figure be achieved in tensile strength and strain capacity [3,4]; see Figure 1.Received: 44 AugustReceived: Accepted:88October. Comprise a group of micro mechanic-based building materials ment-based composites (ECC) comprise a group of micro mechanic-based building matedemonstrating outstanding mechanical properties whenwhen subjected to tensile loading [1,2]. Rials demonstrating outstanding mechanical properties subjected to tensile loading. By adding specific high-performance microfibres, e.g., aramide.g., fibresaramid (ARA),fibres polybenzoxa[1,2]. (ARA), zole fibres (as spun: PBO-AS; high PBO-AS; modulus:high PBO-HM). High-density polyethylene fibres polybenzoxazole fibres (as spun: modulus: PBO-HM) or high-density pol(HDPE), enhancements the order of several percent be achieved in yethyleneconsiderable fibres (HDPE), considerableon enhancements on the order of can several percent can tensile strength and strain capacity [3,4]; see Figure be achieved in tensile strength and strain capacity [3,4]; see Figure 1

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