Open AccessA novel bond stress-slip model for 3-D printed concretes
Author(s) -
ChunHui He,
Shuhua Liu,
Chao Liu,
Hamid M. Sedighi
Publication year - 2022
Publication title -
discrete and continuous dynamical systems. series s
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.481
H-Index - 34
eISSN - 1937-1632
pISSN - 1937-1179
DOI - 10.3934/dcdss.2021161
Subject(s) - slip (aerodynamics) , materials science , bond , surface finish , bond strength , constitutive equation , surface roughness , structural engineering , composite material , computer science , finite element method , engineering , adhesive , finance , layer (electronics) , economics , aerospace engineering
This paper considers the 3D printing process as a discontinuous control system and gives a simple and coherent bond stress-slip model for a new and intelligent building 3-D printed concrete. The previous models focused on either the maximal stress or the maximal slip, however, the novel model uses an energy approach by the dimension analysis, so that the main factors affecting the bond stress-slip relationship can be clearly revealed, mainly including the concrete's properties (its porous structure and its strength), the steel bar's properties (its printing direction, its strength, its surface roughness and its geometrical property) and the printing process. It is confirmed that the proposed model, similar to the constitutive relationship in elasticity, plays a key role in concrete mechanics, and it can conveniently explain the observed phenomena from the experiment.