Infrastructure Engineering - Research Publications
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ItemNo Preview AvailableNovel hierarchical bioinspired cellular structures with enhanced energy absorption under uniaxial compression(ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER, 2024-04)
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ItemNo Preview AvailableMulti-objective bulk scale optimisation of an auxetic structure to enhance protection performance(ELSEVIER SCI LTD, 2023-04-01)
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ItemNo Preview AvailableAnti-blast and-impact performances of auxetic structures: A review of structures, materials, methods, and fabrications(ELSEVIER SCI LTD, 2023-02-01)
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ItemNo Preview AvailableDual-mechanism auxetic-core protective sandwich structure under blast loading(ELSEVIER SCI LTD, 2022-11-01)
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ItemNo Preview AvailableBallistic performance of a lightweight nacre-inspired armour panel – a numerical study(Elsevier, 2022-08-01)This paper provides a numerical investigation on the ballistic performance of ceramic composite armour panels with porous architectures inspired by nacre from mollusc shells. The development of such armour panels can lead to reduced weight and improve ballistic performance through projectile rotation induced by non-uniform contact stresses. The porous tablets of nacre have the potential to reduce the mass of armour panels without compromising their ballistic performance. Preliminary simulations were conducted to assess the performance of several porous bio-inspired structures that have the potential to survive projectile impact with less mass. Several bio-inspired panels composed of various porous designs were generated based on the different void architectures of nacre's tablets. Their performances were benchmarked against a monolithic panel under the same projectile impact condition and having the same 4.5 mm overall panel thickness but higher mass. It was found that for the cases considered, the biomimetic panels with porous architectures possess better ballistic performance compared to the corresponding monolithic panel by arresting the projectile having an initial impact velocity of 500 m/s, whilst reducing its mass by up to 18%. A further study was conducted on bio-inspired panels with a higher thickness but the same mass as the solid monolithic panel under the same projectile impact condition. It was found that the bio-inspired panel exhibits significantly improved ballistic performance when subjected to a fragment simulating projectile having an initial velocity chosen to be the ballistic limit velocity of the corresponding monolithic panel.
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ItemUncovering a high-performance bio-mimetic cellular structure from trabecular bone(Springer Science and Business Media LLC, 2020-12)The complex cellular structure of trabecular bone possesses lightweight and superior energy absorption capabilities. By mimicking this novel high-performance structure, engineered cellular structures can be advanced into a new generation of protective systems. The goal of this research is to develop an analytical framework for predicting the critical buckling load, Young’s modulus and energy absorption of a 3D printed bone-like cellular structure. This is achieved by conducting extensive analytical simulations of the bone-inspired unit cell in parallel to traverse every possible combination of its key design parameters. The analytical framework is validated using experimental data and used to evolve the most optimal cellular structure, with the maximum energy absorption as the key performance criterion. The design charts developed in this work can be used to guide the development of a futuristic engineered cellular structure with superior performance and protective capabilities against extreme loads.
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ItemA comprehensive review of selected biological armor systems - From structure-function to bio-mimetic techniques(ELSEVIER SCI LTD, 2019-10-01)This paper explores several lamellar structures found in nature, which have been shown to possess superior armor systems. In particular, the hard armor systems of nacre and conch shells, and the flexible armor system of fish scales are the focus of this review due to their high relevance to the protective structural engineering discipline. The structure–function relationships that govern the superior mechanical performance of these systems are attributed to their well-organized composite hierarchical structures. The paper also reviews advancements in additive manufacturing techniques for proof-of-concept prototyping, as well as advanced modeling techniques that have been employed to capture the complex geometries of biological structures and the interactions between their constituents. Finite element modeling and 3D printing were found to be the most popular techniques, as they automate the process of modeling and manufacturing complex bio-mimetic composites from a computer-aided design. Finally, attempts to apply bio-mimicry to the structural engineering discipline have been identified, which remains a new and exciting area of research.