Fracture and transport analysis of heterogeneous 3D-Printed lamellar cementitious materials

Gupta, Shashank; Esmaeeli, Hadi S.; Prihar, Arjun; Weiss, Jason

doi:10.1016/j.cemconcomp.2023.105034

Cited by 9 publications

(1 citation statement)

References 89 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A linear elastic fracture mechanics (LEFM) approach [53] can be extended to understand fracture in synthetic counterparts inspired by these natural architectures. Researchers have explored the use of LEFM as a basis to understand the role of weak interfaces in the design of brittle cement paste with enhanced fracture toughness [54]. Using LEFM, the condition for interfacial crack propagation vs. penetration into bulk in layered materials can be stated in terms of energy release rate as [55]:…”

Section: A Bio-inspired Strategy Towards Design Of Architected Materialsmentioning

confidence: 99%

Perspectives in architected infrastructure materials

Moini

2024

RILEM Tech Lett

View full text Add to dashboard Cite

This paper presents perspectives and progress in the emerging field of architected infrastructure materials. Recent developments in advanced and additive manufacturing with construction materials have led to new capabilities to define, design, and shape the internal arrangement and overall morphology of materials. In contrast to conventional casting techniques used in the construction of civil engineering materials, such advancements have allowed for purposeful designs of materials into specific morphologies across scales, referred to as architected infrastructure materials. Contrary to monolithic construction materials, architected materials present new opportunities to engineer enhanced mechanical properties and unique performance characteristics in civil infrastructure components through design. Here, we present an overview of the field and the research gaps in design, manufacturing, and materials mechanics. An overview of a few design opportunities, including bio-inspired strategies is discussed. Current advancements in the field are presented focusing on cement-based, non-hydraulic, and cementitious composite architected materials. The existing studies on bouligand, cellular, lattice, auxetic, tabulated, and gradient architected construction materials and their mechanically advantageous characteristics are reviewed. The future directions and perspectives for the field are outlined with respect to the current research gaps and upcoming opportunities.

show abstract

Section: A Bio-inspired Strategy Towards Design Of Architected Materialsmentioning

confidence: 99%

Perspectives in architected infrastructure materials

Moini

2024

RILEM Tech Lett

View full text Add to dashboard Cite

show abstract

Tough and Ductile Architected Nacre‐Like Cementitious Composites

Gupta,

Esmaeeli,

Moini

2024

Adv Funct Materials

View full text Add to dashboard Cite

Enhancing fracture toughness and ductility of brittle materials such as concrete remains a challenge. Nature offers numerous mechanisms to enhance fracture toughness using purposeful designs of materials’ architecture. Natural nacre exhibits high fracture toughness by promoting inelastic deformation and hierarchical toughening mechanisms. Here, “nacre‐like‐separated” and “nacre‐like‐grooved” cementitious composites inspired by brick‐and‐mortar arrangement of mollusk shells are proposed. These nacre‐like composites are engineered by laser processing cement paste into individual tablets and grooved patterns (as intentional defects) and laminating them with limited amounts of suitable elastomeric (polyvinyl siloxane) interlayers. It is found that interlayer deformation, tortuous crack propagation guided by the defects, and crack bridging are the main toughening mechanisms in these composites that lead to rising resistance curves. The study hypothesizes tablet sliding as an additional toughening mechanism in “nacre‐like‐separated”, preventing tablet failure and leading to the postponed onset of bulk composite failure. These mechanisms significantly enhance both fracture toughness and ductility by 17.1 and 19 folds, compared to constituent hardened cement paste, respectively. By engineering laser‐induced defects into tabulated cementitious‐elastomeric material at meso‐scale, a class of tough and ductile cementitious composites is introduced, resulting in significantly high fracture toughness values (73.68 MPa.mm1/2), comparable to Ultra‐high‐performance‐concrete without sacrificing the strength.

show abstract

Tough Cortical Bone‐Inspired Tubular Architected Cement‐Based Material with Disorder

Gupta,

Moini

2024

Advanced Materials

View full text Add to dashboard Cite

Cortical bone is a tough biological material composed of tube‐like osteons embedded in the organic matrix surrounded by weak interfaces known as cement lines. The cement lines provide a microstructurally preferable crack path, hence triggering in‐plane crack deflection around osteons due to cement line‐crack interaction. Inspired by this toughening mechanism and facilitated by a hybrid (3D‐printing/casting) process, the study engineers architected tubular cement‐based materials with the stepwise cracking toughening mechanism, that enables a non‐brittle fracture. Using experimental and theoretical approaches, the study demonstrates the competition between tube size and shape on stress intensity factor from which engineering stepwise cracking can emerge. Two competing mechanisms, both positively and negatively affected by the growing tube size, arise to significantly enhance the overall fracture toughness by up to 5.6‐fold compared to the monolithic brittle counterpart without sacrificing the specific strength. This is enabled by crack‐tube interaction and engineering the tube size, shape, and orientation, which promotes rising resistance‐curves (R‐curve). “Disorder” curves and statistical mechanics parameters are proposed for the first time to quantitatively characterize the degree of disorder for describing the representation of the architected arrangement of materials in lieu of otherwise inadequate “periodicity” classification and misperceived disorder parameters (perturbation and Voronoi tessellation methods).

show abstract

Fracture and transport analysis of heterogeneous 3D-Printed lamellar cementitious materials

Cited by 9 publications

References 89 publications

Perspectives in architected infrastructure materials

Perspectives in architected infrastructure materials

Tough and Ductile Architected Nacre‐Like Cementitious Composites

Tough Cortical Bone‐Inspired Tubular Architected Cement‐Based Material with Disorder

Contact Info

Product

Resources

About