The Theory of Critical Distances to assess the effect of cracks/manufacturing defects on the static strength of 3D-printed concrete

被引：24

作者：

Alanazi, N. ^{[1
,2
]}

Kolawole, J. T. ^{[3
]}

Buswell, R. ^{[3
]}

Susmel, L. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Civil & Struct Engn, Mappin St, Sheffield S1 3JD, England

[2] Univ Hail, Coll Engn, Dept Civil Engn, Hail 81411, Saudi Arabia

[3] Loughborough Univ, Sch Architecture, Bldg & Civil Engn, Loughborough LE11 3TU, England

来源：

ENGINEERING FRACTURE MECHANICS | 2022年 / 269卷

基金：

英国工程与自然科学研究理事会;

关键词：

Additive manufacturing; Concrete; Crack; Defects; Critical distance; HARDENED PROPERTIES; GRADIENT MECHANICS; FATIGUE BEHAVIOR; DESIGN; PARAMETERS; COMPONENTS; LENGTH;

D O I：

10.1016/j.engfracmech.2022.108563

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The present paper deals with the use of the Theory of Critical Distances to model the detrimental effect of cracks and manufacturing defects in 3D-printed concrete subjected to static loading. The robustness of the proposed approach was assessed against a number of experimental results that were generated by testing, under three-point bending, 3D-printed rectangular section specimens weakened by saw-cut crack-like sharp notches, surface roughness (due to the extrusion filaments) and manufacturing defects. The sound agreement between experiments and predictive model allowed us to demonstrate that the Theory of Critical Distances is not only a reliable design approach, but also a powerful tool suitable for guiding and informing effectively the additive manufacturing process.

引用

页数：15

共 46 条

[1] A material length scale-based methodology to assess static strength of notched additively manufactured polylactide (PLA) [J].

Ahmed, A. A. ;

Susmel, L. .

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2018, 41 (10) :2071-2098

[2] Theory of Critical Distances and static/dynamic fracture behaviour of un-reinforced concrete: length scale parameters vs. material meso-structural features [J].

Alanazi, N. ;

Susmel, L. .

ENGINEERING FRACTURE MECHANICS, 2022, 261

[3] Estimating static/dynamic strength of notched unreinforced concrete under mixed-mode I/II loading [J].

Alanazi, N. ;

Susmel, L. .

ENGINEERING FRACTURE MECHANICS, 2020, 240

[4] On the use of linear-elastic local stresses to design load-carrying fillet-welded steel joints against static loading [J].

Ameri, A. A. H. ;

Davison, J. B. ;

Susmel, L. .

ENGINEERING FRACTURE MECHANICS, 2015, 136 :38-57

[5]

Anderson TL., 1994, Fracture mechanics: fundamentals and applications

[6]

[Anonymous], 2019, BS EN 12390-5

[7] Intrinsic material length, Theory of Critical Distances and Gradient Mechanics: analogies and differences in processing linear-elastic crack tip stress fields [J].

Askes, H. ;

Livieri, P. ;

Susmel, L. ;

Taylor, D. ;

Tovo, R. .

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2013, 36 (01) :39-55

[8] Fracture mechanics and notch sensitivity [J].

Atzori, B ;

Lazzarin, P ;

Meneghetti, G .

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2003, 26 (03) :257-267

[9] A Concise Review on Interlayer Bond Strength in 3D Concrete Printing [J].

Babafemi, Adewumi John ;

Kolawole, John Temitope ;

Miah, Md Jihad ;

Paul, Suvash Chandra ;

Panda, Biranchi .

SUSTAINABILITY, 2021, 13 (13)

[10] Improving performance of additive manufactured (3D printed) concrete: A review on material mix design, processing, interlayer bonding, and reinforcing methods [J].

Baduge, Shanaka Kristombu ;

Navaratnam, Satheeskumar ;

Abu-Zidan, Yousef ;

McCormack, Tom ;

Nguyen, Kate ;

Mendis, Priyan ;

Zhang, Guomin ;

Aye, Lu .

STRUCTURES, 2021, 29 :1597-1609

← 1 2 3 4 5 →