Toughening mechanisms and damage propagation in Architected-Interfaces

TY - JOUR

T1 - Toughening mechanisms and damage propagation in Architected-Interfaces

AU - L.S. Hedvard, Michelle

AU - Dias, Marcelo A.

AU - Budzik, Michal Kazimierz

PY - 2024/2

Y1 - 2024/2

N2 - We investigate fracture toughness of architected interfaces and their ability to maintain structural integrity and provide stable damage propagation conditions beyond the failure load. We propose theoretical and numerical frameworks to evaluate the fracture properties of architected interfaces sandwiched between two (face) materials. The microscopic geometries of these interfaces are chosen as 2D cells – pillar, tetrahedron, and hexagon – as well as their 3D counterparts – namely, pillar array, octet truss, and Kelvin cell. Our model, both numerical and analytical, exhibits a high level of accuracy in predicting the compliance before failure and failure loads. Novel results are obtained during the damage propagation regime, indicating fulfilment of the so-called fail-safe design. Some of the cell geometries unfold during fracture, thus increasing the failure load and ensuring stable and controlled damage propagation conditions.

AB - We investigate fracture toughness of architected interfaces and their ability to maintain structural integrity and provide stable damage propagation conditions beyond the failure load. We propose theoretical and numerical frameworks to evaluate the fracture properties of architected interfaces sandwiched between two (face) materials. The microscopic geometries of these interfaces are chosen as 2D cells – pillar, tetrahedron, and hexagon – as well as their 3D counterparts – namely, pillar array, octet truss, and Kelvin cell. Our model, both numerical and analytical, exhibits a high level of accuracy in predicting the compliance before failure and failure loads. Novel results are obtained during the damage propagation regime, indicating fulfilment of the so-called fail-safe design. Some of the cell geometries unfold during fracture, thus increasing the failure load and ensuring stable and controlled damage propagation conditions.

KW - Adhesive

KW - Architected materials

KW - Bonding

KW - Fracture

KW - Interfaces

KW - Mechanical metamaterial

U2 - 10.1016/j.ijsolstr.2023.112600

DO - 10.1016/j.ijsolstr.2023.112600

M3 - Journal article

SN - 0020-7683

VL - 288

JO - International Journal of Solids and Structures

JF - International Journal of Solids and Structures

M1 - 112600

ER -