Mechanical behavior and size effect of the staggered bio-structure materials

Abstract

This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights • A strain gradient shear-lag model for the staggered bio-structure is developed in which the effects of microstructures and scale were incorporated. • The analytical expressions of the overall effective modulus, interfacial strengths and deformations of the staggered bio-structure material are obtained. • The size effects of the properties of the staggered bio-structure are studied. • The predicted effective moduli of nacreous layer in different shells are compared with corresponding experimental results and are in good agreement with experimental results.

Hypocrystalline ceramic aerogels for thermal insulation at extreme conditions

“…The hypocrystalline zircon components (Fig. 2f ) ensure a fundamental toughening in the material attributed to the amorphous zircon binders with near-ideal strength from the strain-gradient theory 44 , 45 , whereas the nanofibre building blocks provide an excellent deformability (Supplementary Fig. 24 ) and the connected fibrous network (Supplementary Fig.…”

Succulent‐Inspired Ultraflexible and Multifunctional Carbon Aerogel for High‐Performing Strain Sensing and Thermal Management

“…[ 34 ] Increasing the thickness of LGO layer will reduce its binding performance instead. [ 35 ] Moreover, due to the same sp 2 lattice structure of the three components, the interfacial compatibility is high, endowing strong π–π interaction and hydrogen bonds to construct the UCAGs (molecular dynamics (MD) simulations in Figure S5, Supporting Information). The density of the UCAGs can be simply tuned over a wide range, depending on the thickness of GA in the structure (Figure S6, Supporting Information).…”

3D-Printed Biomimetic Hierarchical Nacre Architecture: Fracture Behavior and Analysis

“…However, numerous analytical and simulation studies were conducted to examine failure behavior and superior mechanical structure concerning stacking arrangements in NC and NS. The crack propagation, crack hindering, and braking of these significant uniform and nonuniform placements in NC and NS were represented by various models like (i) discrete element method (DEM), (ii) representative volume element (RVE), and (iii) trans-scale shear-lag model . The study showed using DEM (eqs –) that the propagation of a crack in NC is through the tablet boundary, which can be hindered and pinned; nevertheless, a slight amount increases in toughness; as a result, it will reduce the cohesive length of pinning compared to the coherent size of the crack.…”

“…The research focuses on developing artificial nacre structures with strengthening mechanisms, such as crack blunt, deflection, stress delocalization, crack bridging, interfacial strengthening, topological interlocking, and aspect ratio , to accomplish the requirements of high structural applications. Researchers have studied the fracture modes and gained an understanding of the failure of the nacre using simulation and analytical modeling approaches; nevertheless, there have not been many experimental studies conducted to understand the observed behavior. − Modern manufacturing methods, such as 3D printing, open room to designing bio-inspired artificial nacre materials with systematic control over brick-and-mortar stacking, interlocking, toughening, and failure understanding. , Additive manufacturing (AM) enables on-demand customized construction of the object by virtue of 3D scan’s digital slicing, CAD, or tomography data, where substances form layer-by-layer, devoid of the demand for machining and molds. AM techniques covered numerous categories per ISO/ASTM 59200:2021 based on the feeding material type or curing mechanisms.…”

“…Researchers have studied the fracture modes and gained an understanding of the failure of the nacre using simulation and analytical modeling approaches; nevertheless, there have not been many experimental studies conducted to understand the observed behavior. 16 − 18 Modern manufacturing methods, such as 3D printing, open room to designing bio-inspired artificial nacre materials with systematic control over brick-and-mortar stacking, interlocking, toughening, and failure understanding. 19 , 20 Additive manufacturing (AM) enables on-demand customized construction of the object by virtue of 3D scan’s digital slicing, CAD, or tomography data, where substances form layer-by-layer, devoid of the demand for machining and molds.…”