Bio-inspired vs. conventional sandwich beams: A low-velocity repeated impact behavior exploration

Sabah, S.H. Abo; Kueh, Ahmad Beng Hong; Al-Fasih, M.Y.

doi:10.1016/j.conbuildmat.2018.02.201

Cited by 54 publications

(16 citation statements)

References 24 publications

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“…Previous studies of bighorn sheep have established that velar architecture stores energy during quasi-static 5 and impact 6 loading. However, there have not been any previous attempts to mimic this structure as has been done for other natural impact resistant and energy-storing materials such as nacre [12][13][14][15][16][17][18] , mantis shrimp dactyl club 19,20 , woodpecker skull 21 , conch shell 22 , and beetle shell 23 . Our results show that velar architecture exhibits similar bone volume fraction, larger velar thickness and spacing, and lower velar number and connectivity density compared to the analogous architectural indices in human and sheep trabecular bone.…”

Section: Discussionmentioning

confidence: 99%

Bioinspired material architectures from bighorn sheep horncore velar bone for impact loading applications

Aguirre

Fuller

Ingrole

et al. 2020

Sci Rep

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Rocky Mountain bighorn sheep rams (Ovis canadensis canadensis) routinely conduct intraspecific combat where high energy cranial impacts are experienced. Previous studies have estimated cranial impact forces to be up to 3400 N during ramming, and prior finite element modeling studies showed the bony horncore stores 3 × more strain energy than the horn during impact. In the current study, the architecture of the porous bone within the horncore was quantified, mimicked, analyzed by finite element modeling, fabricated via additive manufacturing, and mechanically tested to determine the suitability of the novel bioinspired material architecture for use in running shoe midsoles. The iterative biomimicking design approach was able to tailor the mechanical behavior of the porous bone mimics. The approach produced 3D printed mimics that performed similarly to ethylene–vinyl acetate shoe materials in quasi-static loading. Furthermore, a quadratic relationship was discovered between impact force and stiffness in the porous bone mimics, which indicates a range of stiffness values that prevents impact force from becoming excessively high. These findings have implications for the design of novel bioinspired material architectures for minimizing impact force.

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Section: Discussionmentioning

confidence: 99%

Bioinspired material architectures from bighorn sheep horncore velar bone for impact loading applications

Aguirre

Fuller

Ingrole

et al. 2020

Sci Rep

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“…Material non-linearity was considered by giving the non-linearity parameters in Sap 2000. A similar kind of nonlinear concrete modeling was adopted by Mokhatar et al [29] and Sabah et al [30,31] to evaluate the impact responses of concrete slab and bio-inspired sandwich composite beams, respectively.…”

Section: Column Designmentioning

confidence: 99%

A Simplified Approach for Analysis and Design of Reinforced Concrete Circular Silos and Bunkers

Saleem¹,

Khurshid²,

Qureshi³

et al. 2018

TOBCTJ

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Background: Reinforced concrete silos and bunkers are commonly used structures for large storage of different materials. These structures are highly vulnerable when subjected to intense seismic forces. Available guidelines for analysis and design of these structures require special design skills and code procedures. Objective: The current study is aimed to elaborate the design procedures from different sources to a unified method, which can be applied to a larger class of reinforced concrete silos. In this study, analysis and design procedures are summarized and presented in a simplified form to make sure the efficient practical design applications of reinforced concrete silos. Method: Four different cases of silo design based on the type and weight of stored material were considered for the study. For each case, the silo was designed using given design procedure and modeled using FEM-based computer package. All of the reinforced concrete silos were subjected to gravity, wind and seismic forces. Results: After performing the analysis and design of different silos, the bending moment, shear force and axial forces profiles were given for a sample silo. The results obtained from the proposed design procedure were compared with FEM values for different components of silos such as slab, wall and hopper. Conclusion: The comparison of tangential and longitudinal forces, bending moments, shear forces and reinforcement ratios of different parts of silos have shown a fair agreement with the FEM model results. It motivates to use the proposed design procedure for an efficient design of reinforced concrete silos.

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“…Moreover, in the study [6], the effect of beam size was also discussed, showing that the maximum displacement of the larger beam was smaller than that of the smaller one. To improve the impact resistance of RC beams, many means of reinforcement and new types of member have been studied and proposed, e.g., beams strengthened with high strength steel wire mesh and highperformance mortar (HSSWM-HPM) [2], beams enhanced with fiber-reinforced polymer [8,9] or steel tube [9], and sandwich beams [10,11]. The impact resistance of beams can be improved more or less in these ways.…”

Section: Introductionmentioning

confidence: 99%

Impact resistance of RC beams under different combinations of mass and velocity: mesoscale numerical analysis

Jin

Lan

Zhang

et al. 2020

Archiv.Civ.Mech.Eng

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The concrete structures under impact loading duress may be destroyed within an extremely short period of time. The importance and complexity of exploration on the impact resistance of concrete members make this area still open for discussion. In the present study, a 3-D mesoscale numerical model was established to investigate the effect of the combination of impact mass and velocity on the mechanical behavior of reinforced concrete (RC) beams subjected to impact loadings. Heterogeneity of concrete and strain rate effects of concrete and steel bars were taken into account. Furthermore, nonlinear interaction between the concrete and steel bars was considered herein. Results from macroscale and mesoscale simulation were compared with the available physical tests, indicating that the mesoscale numerical model can better represent the influence of heterogeneity of concrete on the mechanical behavior of RC beams. Five different impact energy levels were involved to study the effect of the combination of impact mass and velocity on the impact resistance of RC beams. At last, the residual bearing capacity and natural frequency of impacted RC beams were numerically calculated and their relationship was discussed. It is indicated that the deformation of RC beams is influenced strongly by the impulse, which increases with the increasing impact mass at identical impact energy. Besides, the failure mode of RC beams turns from shear-dominant failure mode to bending shear failure mode with the increase of impact mass, accompanied by the increase of energy dissipation of steel bars and the whole member. Despite this, in the present work, the combination of the impact mass and velocity had little influence on the damage extent (based on the performance) of the RC beams. Moreover, an empirical relationship between the residual bearing capacity and the natural frequency of the impacted RC beams was established as a rough reference for damage evaluation in engineering practice.

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Bio-inspired vs. conventional sandwich beams: A low-velocity repeated impact behavior exploration

Cited by 54 publications

References 24 publications

Bioinspired material architectures from bighorn sheep horncore velar bone for impact loading applications

Bioinspired material architectures from bighorn sheep horncore velar bone for impact loading applications

A Simplified Approach for Analysis and Design of Reinforced Concrete Circular Silos and Bunkers

Impact resistance of RC beams under different combinations of mass and velocity: mesoscale numerical analysis

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