Article
Mechanics
Xue Li, Rui Kang, Cong Li, Zhiyang Zhang, Zhenyu Zhao, Tian Jian Lu
Summary: In order to minimize the fatal threats of fully confined blasts to surface battleships, ultralight all-metallic sandwich panels with square honeycomb cores are proposed as an alternative to traditional metallic plates for ship construction. A combined experimental and numerical approach is used to investigate the dynamic responses of the sandwich panels under blast loading and compare its blast resistance to that of the monolithic counterpart. Finite element simulations with the CEL approach are performed to explore the physical mechanisms. The results show that the proposed sandwich panel exhibits significantly higher blast resistance due to its consumption of impact energy through various deformation modes.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Alexandre Afonso, Marta Tome, Filipa Moleiro, Aurelio L. Araujo
Summary: In this work, a laminated sandwich plate model with external piezoelectric layers is extended for buckling and dynamic stability analysis. The model considers in-plane harmonic uniformly distributed loads and solves the Mathieu-type equilibrium equations using Bolotin's method to obtain the regions of dynamic instability. The validated model is then used to simulate the behavior of laminated composite and sandwich plates with piezoelectric patches, controlled using a closed loop law with proportional and derivative gains, for buckling and dynamic stability analysis. This control system can postpone buckling, increase fundamental frequencies, and reshape the regions of dynamic instability.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Zhang DuJiang, Zhao ZhenYu, Du ShaoFeng, Chen WeiJie, Yang Fan, Ni ChangYe, Yang ZhiKun, Lu TianJian
Summary: A novel ultralight all-metallic sandwich panel with 3D tube cellular cores was proposed as a protective system for vehicle underbodies. Experimental measurements and numerical simulations were conducted to study its performance under explosion attacks, and an optimal design of the 3D tube cellular core was carried out.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Mechanics
H. S. Bharath, Sunil Waddar, Siddappa I. Bekinal, P. Jeyaraj, Mrityunjay Doddamani
Summary: In this study, sandwiches are printed using high density polyethylene (HDPE) skins and syntactic foam core with glass microballoons (GMBs) embedded in HDPE. Increasing GMB content enhances load to buckle and frequency of the printed sandwiches. The natural frequency decreases with higher compressive loads and increases exponentially when the load exceeds critical buckling load.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Shuang Li, Jin-Shui Yang, Fang Yang, Ruediger Schmidt, Yong-Le Fan, Lin-Zhi Wu, Kai-Uwe Schroeder
Summary: Sandwich structures have been widely used in various fields for their lightweight and high load bearing properties. With the development of ship stealth technology, there is a demand for multifunctional structures with lightweight, high loading capacity, and excellent vibration reduction performances. The study focuses on the design and fabrication of novel gradient metallic lattice sandwich structures, and investigates their vibration characteristics and isolation performances through testing and simulation. The results show that interlayer gradient and face sheet thickness significantly affect the vibration characteristics, and the positive gradient structure has the best vibration isolation performance.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Mechanical
Yiqun Cao, Xiaoliang Geng, Hui Han, Yahui Lu, Jun Wang, Changan Zhao
Summary: This paper investigates the buckling performance of 3D printed lattice sandwich structures through theoretical analysis, numerical simulation, and mechanical tests. It compares two types of lattice structures and discusses the differences in their bearing capacities and toughness, as well as the different buckling modes. The results show that the rhombic dodecahedron lattice structure has higher bearing capacity and toughness compared to the body centered cubic lattice structure.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Engineering, Mechanical
Kun Liu, Li Ke, Yanyan Sha, Guangming Wu, Peng Wang, Zili Wang
Summary: This study investigates the dynamic response characteristics of laser-welded corrugated sandwich panels under a long-time plane blast wave through experiments and numerical simulations. A simplified analysis method is proposed based on the simulation results. The reliability of the method is confirmed.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Engineering, Mechanical
Shivdayal Patel, Murlidhar Patel
Summary: A novel hybrid composite honeycomb sandwich structure and metallic honeycomb sandwich structure were developed to consider blast loading. Finite element analysis and progressive damage modeling showed that the hybrid composite honeycomb sandwich structure had better blast resistance than the metallic honeycomb sandwich structure.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Engineering, Mechanical
He Zhang, Yu-kun Liu, Xiao-hong Wang, Tao Zeng, Zhi-xin Lu, Guo-dong Xu
Summary: The present study investigates the global buckling behavior of sandwich beams with graded lattice cores. The effects of the graded parameters and geometric parameters on the critical buckling load are discussed. The graded lattice sandwich beams exhibit global buckling when the graded parameter is small, with the influence on buckling performance being minor.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Mechanics
Chunping Xiang, Jiao Wang, Shangjun Chen, Guoxi Fan
Summary: In this paper, a yield criterion considering the effect of core strength was proposed for sandwich pipe (SP) materials, and the dynamic response of a fully clamped slender SP under transverse impact was theoretically predicted by considering the interaction of stretching and bending of the structure. The theoretical predictions were verified through the establishment of finite element models, and good agreements were achieved between the theoretical predictions and the numerical results. It is demonstrated that the large deflection of SPs is dominated by the axial force. This study can provide the basic understandings of the structural behaviours of SPs for their safety in submarine applications threated by transverse impact.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Jianfeng Li, Qinghua Qin, Jianxun Zhang
Summary: This study investigates the internal blast resistance of metal sandwich cylinder with lattice cores, focusing on the effects of core geometry, arrangement, wall thickness, shell mass distribution and cover. Results show that core geometry and arrangement significantly impact the blast resistance and deformation mechanism of sandwich cylinders. Asymmetric design of inner and outer shells enhances internal blast resistance of the sandwich cylinders.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Polymer Science
Shu-Yu Jhou, Ching-Chi Hsu, Jui-Chia Yeh
Summary: This paper introduces a dynamic drop weight impact simulation for predicting the impact response of 3D printed polymeric sandwich structures. The study shows that the shape, number, and material stiffness of the lattice cores have a significant effect on their shock absorption characteristics, providing an effective simulation method for various industries.
Article
Materials Science, Multidisciplinary
Alberto Leonardi, Matteo Leoni
Summary: Advanced design of metallic nanocrystals requires control of dynamic lattice distortion. In this study, atomistic simulations and total scattering were used to investigate lattice vibrations induced by thermal motion of atoms in Pd nanocrystals. The results showed a correlation between lattice vibrations and atom-pair distance, as well as negative correlations in displacements of far-neighbor atoms. A dynamical model was proposed to predict the influence of material structure and nanocrystal shape on lattice distortion.
Article
Engineering, Multidisciplinary
Jian-hua Dong, Yong-jun Wang, Feng-nian Jin, Hua-lin Fan
Summary: This paper investigates the crushing behavior and energy absorption of buckling induced meta-lattice structures. The results show that introducing buckling pattern can substantially improve the performance of the structure.
DEFENCE TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Dileep Bonthu, H. S. Bharath, Siddappa I. Bekinal, P. Jeyaraj, Mrityunjay Doddamani
Summary: This study investigates the mechanical buckling and free vibration behavior of functionally graded sandwich foams (FGSFs) produced via three-dimensional printing (3DP). The study explores the effects of filler percentage on the density, critical buckling load, natural frequency, and damping factor of the FGSFs. The research provides valuable insights for the field of 3D printing and presents important findings regarding the buckling behavior and frequency characteristics of 3D printed FGSFs.
RAPID PROTOTYPING JOURNAL
(2023)
Article
Mechanics
A. Vigliotti, S. S. Shishvan, R. M. McMeeking, V. S. Deshpande
Summary: The study shows that cell spreading, contractility, and mechano-sensitivity on a bed of micro-posts increase with the stiffness of the foundation. Traction forces exerted by cells are concentrated along the cell periphery and are independent of cell area on average. The increased foundation stiffness leads to higher levels of stress-fibre polymerization, causing both cell area and average tractions to increase.
Article
Engineering, Multidisciplinary
Ottman A. Tertuliano, Bryce W. Edwards, Lucas R. Meza, Vikram S. Deshpande, Julia R. Greer
Summary: Natural hard composites like human bone possess excellent strength and toughness due to their complex hierarchical structure spanning multiple length scales. A new experimental methodology allows for quantifying nano-scale toughening mechanisms and crack behavior, providing insights for designing biomimetic composites.
BIOINSPIRATION & BIOMIMETICS
(2021)
Article
Mechanics
M. R. O'Masta, V. S. Deshpande
Summary: This study investigates the failure mechanisms in composites with stiff reinforcements within a compliant matrix, identifying two failure modes and developing a reduced order model to predict failure load and mode. The experiments and simulations show good agreement, capturing the effects of material and geometric properties on flexural rigidity and first ply failure mode. Additionally, a failure mechanism map for this system is reported as a guide for the design of laminated composites.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Biomedical
Alberto Ippolito, Vikram S. Deshpande
Summary: Cell alignment, known as contact guidance, is an important step in the organization of adherent cells. By modeling the response of cells on substrates with alternating soft and stiff stripes, researchers have identified three different mechanisms of cell guidance. Guidance towards stiff stripes is primarily due to molli-avoidance behavior, while decreased collagen density inhibits contact guidance.
ACTA BIOMATERIALIA
(2023)
Article
Chemistry, Physical
Angkur Jyoti Dipanka Shaikeea, Huachen Cui, Mark O'Masta, Xiaoyu Rayne Zheng, Vikram Sudhir Deshpande
Summary: Research shows that traditional elastic fracture mechanics and fracture testing methods are insufficient to characterize the fracture properties of advanced ultralight mechanical metamaterials. By combining numerical and asymptotic analysis, the study extends the concepts of elastic fracture mechanics to develop a general test and design protocol for truss-based metamaterials. This new framework provides a basis for understanding fracture in other elastic-brittle solids where traditional notions of fracture toughness may not apply.
Correction
Chemistry, Physical
Angkur Jyoti Dipanka Shaikeea, Huachen Cui, Mark O'Masta, Xiaoyu Rayne Zheng, Vikram Sudhir Deshpande
Article
Electrochemistry
Joe C. Stallard, Sundeep Vema, David S. Hall, Anthony R. Dennis, Megan E. Penrod, Clare P. Grey, Vikram S. Deshpande, Norman A. Fleck
Summary: An experimental protocol is developed to measure the shear strength of NMC811 single crystals within the cathode of a lithium-ion cell. The shear strength of fully lithiated NMC811 single crystals along their basal plane is found to be 86 +/- 12 MPa, and decreases to 39 +/- 5 MPa upon cell charging. This has implications for mechanical loading during manufacture and electrical cycling.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Biophysics
Alberto Ippolito, Vikram S. Deshpande
Summary: Cell density has a significant impact on cell morphology and arrangement, and entropic interactions play a crucial role in the responses of cell monolayers.
BIOPHYSICAL JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
J. Carlsson, K. Li, V. S. Deshpande, N. A. Fleck
Summary: Finite strain numerical solutions were used to study the elastic-plastic behavior of a hexagonal honeycomb under uniaxial compression and tension. The study found that the inclination angle of the cell walls and the characteristics of the core material significantly affect the response of the honeycomb.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Electrochemistry
Shrinidhi S. S. Pandurangi, David S. S. Hall, Clare P. P. Grey, Vikram S. S. Deshpande, Norman A. A. Fleck
Summary: Single crystal, Ni-rich layered lithium metal oxides are potential cathodes for next-generation lithium-ion batteries. However, their anisotropic swelling and contraction during cycling may lead to internal stresses, fracture, and capacity loss. This study predicts the evolution of lithium concentration and stress state within a LiNi0.8Mn0.1Co0.1O2 single crystal using a chemo-mechanical model. The results show that intraparticle fracture is not a significant degradation mode for well-designed NMC811 single crystals.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
S. S. Shishvan, G. Csanyi, V. S. Deshpande
Summary: The susceptibility of ferritic steels to hydrogen embrittlement increases with decreasing strain rates. This is explained by the diffusion of hydrogen. However, for pre-charged specimens, lattice diffusion dominates and has no effect at such low strain rates. A model based on the Hydrogen Induced Fast-Fracture (HIFF) mechanism is presented to rationalize the strain rate dependence of hydrogen embrittlement. The dominant kinetics governing the strain rate sensitivity is the hydrogen desorption rates from cavity surfaces.
Article
Materials Science, Multidisciplinary
J. C. Stallard, S. Vema, C. P. Grey, V. S. Deshpande, N. A. Fleck
Summary: A constrained compression test and simple shear test were conducted to observe the size effect of lithium. The apparent flow strength of lithium increased with decreasing thickness, which is consistent with the results from indentation tests and single pillar compression tests.
Article
Mechanics
S. S. Shishvan, N. A. Fleck, R. M. Mcmeeking, V. S. Deshpande
Summary: The stripping of metal cations from the anode of a Li- or Na-ion cell into a ceramic electrolyte creates voids on the electrode/electrolyte interface, which can lead to dendrite growth and short-circuiting of the cell. Current understanding of void formation is limited, but models based on Onsager formalism suggest that voids will shrink under specific conditions. However, the experimental observation of large void sizes has not been explained by these models, indicating the need for further investigation and consideration of additional mechanisms.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Multidisciplinary Sciences
Chan Soo Ha, Desheng Yao, Zhenpeng Xu, Chenang Liu, Han Liu, Daniel Elkins, Matthew Kile, Vikram Deshpande, Zhenyu Kong, Mathieu Bauchy, Xiaoyu (Rayne) Zheng
Summary: This study presents a rapid inverse design methodology using generative machine learning and desktop additive manufacturing to create metamaterials with nearly all possible mechanical behaviors. Results show that mechanical behavior with full tailorability can be achieved with nearly 90% fidelity between target and experimentally measured results.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Dipayan Mukherjee, Shuai Hao, Paul R. R. Shearing, Robert M. M. McMeeking, Norman A. A. Fleck, Vikram S. S. Deshpande
Summary: Recent observations have shown the existence of sparsely filled cracks in both garnet and sulfide electrolytes, which invalidates the assumption that Li dendrites grow in solid electrolytes via pressure-filled cracks. A variational principle that couples Li deposition, elastic deformation, and cracking in the electrolyte with electrochemical driving forces and dissipation is developed. It is found that Li ingress and cracking occur together in garnet electrolytes, but the cracks are sparsely filled due to the mismatch between crack opening and Li deposition. In sulfide electrolytes, an increase in resistance at the tips of Li filaments leads to crack propagation ahead of the filaments with little filling.
Article
Mechanics
Zhiqiang Meng, Xu Gao, Hujie Yan, Mingchao Liu, Huijie Cao, Tie Mei, Chang Qing Chen
Summary: This paper presents a cage-shaped, self-folding mechanical metamaterial that exhibits multiple deformation modes and has tunable mechanical properties, providing multifunctional applications in various fields.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Hasan Murat Oztemiz, Semsettin Temiz
Summary: Sandwich panel composites have various applications and their mechanical behavior and performance depend on material properties and geometry. The load-carrying capacity of S-core composite sandwich panels increases with the increase of the core wall thickness, but decreases with the increase of the core height.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yang Sun, Wei Zhang, Weipeng Hu, Mabao Liu
Summary: The study presents a novel computational framework to investigate the effect of graphene percolation network on the strength-ductility of graphene/metal composites. It utilizes the Cauchy's probabilistic model, the field fluctuation method, and the irreversible thermodynamics principle.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Elaheh Kazemi-Khasragh, Juan P. Fernandez Blazquez, David Garoz Gomez, Carlos Gonzalez, Maciej Haranczyk
Summary: This study explores group interaction modelling (GIM) and machine learning (ML) approaches for predicting thermal and mechanical properties of polymers. ML approach offers more reliable predictions compared to GIM, which is highly dependent on the accuracy of input parameters.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yafei Yin, Shaotong Dong, Dong Wu, Min Li, Yuhang Li
Summary: This paper investigates a bending-induced instability in sandwiched composite structures, and establishes a phase diagram to predict its characteristics. The results are of great significance in understanding the physical mechanisms of bending instability and providing design guidelines for practical applications.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Dhairya R. Vyas, Sharen J. Cummins, Gary W. Delaney, Murray Rudman, Devang V. Khakhar
Summary: In this study, multiple collisions of granules on a substrate are analyzed using Collisional Smooth Particle Hydrodynamics (CSPH) to understand the influence of impact-induced deformation on subsequent collision dynamics. It is found that the collision dynamics are dependent on the impact location and the deformation caused by preceding impacts. The accuracy of three theoretical models is also evaluated by comparing their predictions with CSPH results, and it is discovered that these models are only useful for predicting collisions at the same location repeatedly.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Sneha B. Cheryala, Chandra S. Yerramalli
Summary: The effect of hybridization on the growth of interface crack along the fiber is predicted. The study shows an enhancement in the compressive splitting strength with hybridization due to the lateral confinement effect on the interfacial crack.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Xiang-Nan Li, Xiao-Bao Zuo, Liang Li, Jing-Han Liu
Summary: A multiscale mechanical model is proposed to quantitatively describe the macro-mechanical behavior of fiber reinforced concrete (FRC) based on its multiscale material compositions. The model establishes the stiffness and strength equations for each scale of FRC and demonstrates the influence of steel fiber parameters on the mechanical properties of FRC.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Vicente Ramirez-Luis, Hilario Hernandez-Moreno, Orlando Susarrey-Huerta
Summary: In this paper, a Multicell Thin-walled Method is developed for studying the stress distributions in multimaterial beams. This method accurately obtains complex stress fields while reducing the solution time and computational cost. Validation with the finite element method confirms the accuracy of the proposed method.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Yanfeng Zheng, Siyuan Li, Jingyao Zhang, Yaozhi Luo
Summary: This study proposes an enhanced simplified model based on finite particle method (FPM) to consider the link cross-sectional size and contact in Bennett linkages. The model introduces virtual beams and contact forces to accurately simulate the real-world behavior of Bennett linkages. The proposed method is effective for dynamic analysis of large-scale deployable Bennett linkages and shows great potential.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Viktoriya Pasternak, Heorhiy Sulym, Iaroslav M. Pasternak
Summary: This paper investigates anisotropic elastic, magnetoelectroelastic, and quasicrystal solids and presents their equations of time-harmonic motion and constitutive relations in a compact and unified form. A matrix approach is proposed to derive the 3D time-harmonic Green's functions for these materials. The effects of phason field dynamics on the phonon oscillations in quasicrystals are studied in detail. The paper provides a strict proof that the eigenvalues of the time-harmonic magnetoelectroelaticity problem are all positive. It also demonstrates the application of the obtained time-harmonic Green's functions in solving boundary value problems for these materials using the derived boundary integral equations.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Jan Tomec, Gordan Jelenic
Summary: This paper investigates the relationship between different formulations and contact-force models in beam-to-beam contact mechanics. It specifically addresses the recently developed mortar method and develops its variant based on the penalty method. The developed elements are tested using the same examples to provide an objective comparison in terms of robustness and computational cost.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Paulo Teixeira Goncalves, Albertino Arteiro, Nuno Rocha, Fermin Otero
Summary: This work presents a novel formulation of a 3D smeared crack model for unidirectional fiber-reinforced polymer composites based on a stress invariant approach for transverse yielding and failure initiation. The performance of the model is evaluated using monotonic and non-monotonic damage evolution, verified with single element tests and compared with experimental results.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Hanbin Yin, Yinji Ma, Xue Feng
Summary: This paper investigates the peeling behavior of a viscoelastic film bonded to a rigid substrate and establishes a theoretical peeling model. The study reveals three typical relationships between the peeling force and peeling velocity, which depend on the viscous dissipation within the film and the rate-dependent adhesion at the interface. Additionally, factors such as film thickness, interfacial toughness, and interfacial strength are identified as influencing the steady-state peeling force.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
Peter Noe Poulsen, John Forbes Olesen
Summary: Finite Element Limit Analysis (FELA) is increasingly used to calculate the ultimate bearing capacity of structures made of ductile materials. This study presents a consistent and general weak formulation based on virtual work for both the lower and upper bound problem, ensuring uniqueness of the optimal solution. A plane element with linear stress variation and quadratic displacement field is introduced, showing good results for load level, stress distribution, and collapse mechanism even for coarse meshes in verification and reinforced concrete examples.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
