scholarly journals Simulation of uniaxial tensile behavior of quasi-brittle materials using softening contact models in DEM

2019 ◽  
Vol 217 (1-2) ◽  
pp. 105-125 ◽  
Author(s):  
Bora Pulatsu ◽  
Ece Erdogmus ◽  
Paulo B. Lourenço ◽  
Romain Quey
Keyword(s):  
Brittle Materials ◽  
Tensile Behavior ◽  
Uniaxial Tensile ◽  
Contact Models

scholarly journals Determination of uniaxial tensile strength of brittle materials using tubular samples

2021 ◽  
Vol 833 (1) ◽  
pp. 012016
Author(s):  
D J Guerrero-Miguel ◽  
M I Alvarez-Fernández ◽  
M B Prendes-Gero ◽  
C González-Nicieza
Keyword(s):  
Tensile Strength ◽  
Brittle Materials ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Strength

scholarly journals Influence of Fiber Volume Fraction and Fiber Orientation on the Uniaxial Tensile Behavior of Rebar-Reinforced Ultra-High Performance Concrete

Fibers ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 67 ◽  
Author(s):  
Manish Roy ◽  
Corey Hollmann ◽  
Kay Wille
Keyword(s):  
Fiber Orientation ◽  
High Performance ◽  
Fiber Volume Fraction ◽  
High Performance Concrete ◽  
Volume Fraction ◽  
Tensile Behavior ◽  
Uniaxial Tensile ◽  
Ultra High Performance Concrete ◽  
Load Direction ◽  
Fiber Volume

This paper studied the influence of fiber volume fraction ( V f ), fiber orientation, and type of reinforcement bar (rebar) on the uniaxial tensile behavior of rebar-reinforced strain-hardening ultra-high performance concrete (UHPC). It was observed that the tensile strength increased with the increase in V f . When V f was kept constant at 1%, rebar-reinforced UHPC with fibers aligned with the load direction registered the highest strength and that with fibers oriented perpendicular to the load direction recorded the lowest strength. The strength of the composite with random fibers laid in between. Moreover, the strength, as well as the ductility, increased when the normal strength grade 60 rebars embedded in UHPC were replaced with high strength grade 100 rebars with all other conditions remaining unchanged. In addition, this paper discusses the potential of sudden failure of rebar-reinforced strain hardening UHPC and it is suggested that the composite attains a minimum strain of 1% at the peak stress to enable the members to have sufficient ductility.

A uniaxial tensile behavior based fatigue crack growth model

2020 ◽  
Vol 131 ◽  
pp. 105324 ◽  
Author(s):  
S.C. Wu ◽  
C.H. Li ◽  
Y. Luo ◽  
H.O. Zhang ◽  
G.Z. Kang
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Model ◽  
Tensile Behavior ◽  
Uniaxial Tensile ◽  
Behavior Based ◽  
Crack Growth Model

scholarly journals Uniaxial Tensile Behavior of Carbon Textile Reinforced Mortar

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 374 ◽  
Author(s):  
Fen Zhou ◽  
Huanhui Liu ◽  
Yunxing Du ◽  
Lingling Liu ◽  
Deju Zhu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Bond Strength ◽  
Volume Fraction ◽  
Tensile Tests ◽  
Optical Microscope ◽  
Tensile Behavior ◽  
Reinforcement Ratio ◽  
Steel Fibers ◽  
Uniaxial Tensile ◽  
Textile Reinforced Mortar

This paper investigates the effects of the reinforcement ratio, volume fraction of steel fibers, and prestressing on the uniaxial tensile behavior of carbon textile reinforced mortar (CTRM) through uniaxial tensile tests. The results show that the tensile strength of CTRM specimens increases with the reinforcement ratio, however the textile–matrix bond strength becomes weaker and debonding can occur. Short steel fibers are able to improve the mechanical properties of the entire CTRM composite and provide additional “shear resistant ability” to enhance the textile– matrix bond strength, resulting in finer cracks with smaller spacing and width. Investigations into the fracture surfaces using an optical microscope clarify these inferences. Increases in first-crack stress and tensile strength are also observed in prestressed TRM specimens. In this study, the combination of 1% steel fibers and prestressing at 15% of the ultimate tensile strength of two-layer textiles is found to be the optimum configuration, producing the highest first-crack stress and tensile strength and the most reasonable multi-cracking pattern.

scholarly journals Plasticizing Effect of Saccharides on Uniaxial Tensile Behavior of κ-Carrageenan Films

2016 ◽  
Vol 45 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Jun-ichi Horinaka ◽  
Maki Tanaka ◽  
Toshikazu Takigawa
Keyword(s):  
Tensile Behavior ◽  
Uniaxial Tensile

scholarly journals Effect of the Combination of Superabsorbent Polymers for Autogenous Shrinkage Control with Steel Fibers of High-Performance Concrete under Uniaxial Tension Using DIC

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4638
Author(s):  
Karyne Ferreira dos Santos ◽  
António Carlos Bettencourt Simões Ribeiro ◽  
Eugênia Fonseca da Silva ◽  
Manuel Alejandro Rojas Manzano ◽  
Leila Aparecida de Castro Motta ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Uniaxial Tension ◽  
Autogenous Shrinkage ◽  
Tensile Behavior ◽  
Steel Fibers ◽  
Image Correlation ◽  
Uniaxial Tensile ◽  
Superabsorbent Polymers ◽  
Cracking Behavior ◽  
Dic Technique

This paper presents a study of the effect of a superabsorbent polymer (SAP) for autogenous shrinkage control on the uniaxial tensile behavior of steel fiber reinforced concrete (SFRC). The use of fibers and SAP potentially increases the durability of the concrete, preventing cracking by autogenous shrinkage and enhancing post-cracking behavior. Furthermore, SAP can provide further hydration for self-healing purposes and improve the ductility of the SFRC. In order to evaluate the effect of the addition of SAP in SFRC, dog-bone SFRC specimens with different dosages of superabsorbent polymers were cast and tested under uniaxial tension. The digital image correlation (DIC) technique was used to understand the effect of SAP on the steel fibers’ crack-bridging mechanisms. Surface strains and crack openings were inferred using the DIC technique. The effect of SAP and fibers on fresh and hardened concrete was individually investigated by flow tests and compressive strength tests. Autogenous shrinkage was measured in plain concrete to investigate the minimum SAP content required to mitigate autogenous shrinkage of 0.3%. The use of 0.3% SAP was also sufficient to reach multiple cracking behavior. This content of SAP completely suppressed the autogenous shrinkage with minimal side effects on compressive strength. An analytical formulation for the tensile behavior of SFRC was developed using the variable engagement model, presenting a mean correlation of R2 of 0.97 with the experimental results.

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