Journal ArticleDOI
Modeling of a biological material nacre: Waviness toughness model
TLDR
Hard biological materials such as nacre, bone, and teeth exhibit high values of toughness although it is meanly made of a ceramic material as mentioned in this paper, however, they are brittle and fail in a catas...Abstract:
Hard biological materials such as nacre, bone, and teeth exhibit high values of toughness although it is meanly made of a ceramic material. Ceramic materials are brittle and fail in a catas...read more
Citations
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3144 - flaw tolerant bulk and surface nanostructures of biological systems
H Gao,B Ji,M J Buehler,H Yao +3 more
TL;DR: In this article, a simple tension-shear chain model has been developed to model the stiffness and fracture energy of biocomposites, and it is shown that the strength optimization is achieved by restricting the characteristic dimension of the basic structure components to nanometer scale so that crack-like flaws do not propagate to break the desired structural link.
Journal ArticleDOI
Gaussian Process Regression Technique to Estimate the Pile Bearing Capacity
Ehsan Momeni,Mohammad Bagher Dowlatshahi,Fereydoon Omidinasab,Harnedi Maizir,Danial Jahed Armaghani +4 more
TL;DR: The results showed that the GPR can be utilized as a practical tool for the PBC estimation and outperforms the GA-based ANN model.
Journal ArticleDOI
Buckling analyses of functionally graded graphene-reinforced porous cylindrical shell using the Rayleigh–Ritz method
TL;DR: In this article, the buckling analysis of a porous nanocomposite cylindrical shell reinforced with graphene platelets (GPLs) using first-order shear deformation theory is carried out.
Journal ArticleDOI
A hybrid GEP and WOA approach to estimate the optimal penetration rate of TBM in granitic rock mass
Zimu Li,Behnam Yazdani Bejarbaneh,Panagiotis G. Asteris,Mohammadreza Koopialipoor,Danial Jahed Armaghani,Mahmood Md Tahir +5 more
TL;DR: In this article, three data mining techniques, namely neural network (NN), gene expression programming (GEP), and multivariate adaptive regression splines (MARS), were employed for modelling the TBM performance, and then the most robust predictive model was optimized via a metaheuristic search method known as whale optimization algorithm (WOA), for the modelling purpose, an experimental database was compiled by performing a field assessment program in a tunneling project in Malaysia and then conducting laboratory testing on the derived rock specimens.
Journal ArticleDOI
Buckling of non-uniformly distributed graphene and fibre reinforced multiscale angle-ply laminates
TL;DR: In this article, the biaxial buckling of angle-ply laminates reinforced with graphene platelets and carbon or glass fibres is investigated based on classical plate theory with the shear effect neglected.
References
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Journal ArticleDOI
Bioinspired structural materials
TL;DR: The common design motifs of a range of natural structural materials are reviewed, and the difficulties associated with the design and fabrication of synthetic structures that mimic the structural and mechanical characteristics of their natural counterparts are discussed.
Journal ArticleDOI
Tough, bio-inspired hybrid materials.
Etienne Munch,Maximimilan E. Launey,Daan Hein Alsem,Daan Hein Alsem,Eduardo Saiz,Antoni P. Tomsia,Robert O. Ritchie,Robert O. Ritchie +7 more
TL;DR: In this article, the authors emulate Nature's toughening mechanisms through the combination of two ordinary compounds, aluminum oxide and polymethylmethacrylate, into ice-templated structures whose toughness can be over 300 times (in energy terms) that of their constituents.
Journal ArticleDOI
The Mechanical Design of Nacre
TL;DR: The tensile strength of mother-of-pearl (nacre) is of the order of 170 MPa (dry) and 140 MPa(wet), values which are best modelled assuming that pullout of the platelets is the main mode of failure as discussed by the authors.
Journal ArticleDOI
Mechanical properties of nanostructure of biological materials
Baohua Ji,Huajian Gao +1 more
TL;DR: In this paper, the authors investigated the mechanics of protein-mineral nanocomposite structure and found that large aspect ratios and a staggered alignment of mineral platelets are the key factors contributing to the large stiffness of biomaterials.
Journal ArticleDOI
On the mechanics of mother-of-pearl: a key feature in the material hierarchical structure
TL;DR: In this article, the structure of nacre is described over several length scales and the tablets were found to have wavy surfaces, which were observed and quantified using various experimental techniques.