Article
Mechanics
Jan-Hendrik Bastek, Dennis M. Kochmann
Summary: Numerical modeling of thin shell structures is challenging, and various finite element method (FEM) formulations have been proposed to tackle this. This study proposes a Physics-Informed Neural Network (PINN) that utilizes machine learning to predict the small-strain response of curved shells. The PINN performs well in identifying the solution field in benchmark tests when the equations are presented in their weak form, but may fail to do so when using the strong form.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Engineering, Civil
Ben Jiang, Xueyan Chen, Jianxin Yu, Yue Zhao, Zhimin Xie, Huifeng Tan
Summary: This study proposed a new thin-walled square tube structure filled with hollow aluminum metal spheres to improve its crashworthiness. Experimental and numerical simulation results showed that filling hollow spheres can change the deformation mode of the thin-walled square tube and increase its load-bearing capacity. The wall thickness, size, and stacking modes of the hollow spheres have significant impacts on the performance of the thin-walled square tube.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Sandra Kvaternik Simonetti, Goran Turkalj, Domagoj Lanc
Summary: This paper investigates the thermal buckling analysis of thin-walled, functionally graded beam-type structures with closed cross-sections and various boundary conditions. A one-dimensional finite element model based on Euler-Bernoulli-Vlasov theory is used under the assumptions of large rotations and small strains. The stability analysis is conducted using eigenvalue and load-deflection methods with the Newton-Raphson approach. The numerical results for different FG material configurations of thin-walled box beams and trapezoidal beams are presented to examine the effects of temperature distribution, boundary conditions, and material properties on the critical buckling temperature and global buckling behavior. The accuracy and reliability of the proposed beam model are verified by comparing it with several benchmark examples.
THIN-WALLED STRUCTURES
(2022)
Article
Mathematics, Applied
Martin Averseng, Xavier Claeys, Ralf Hiptmair
Summary: This work introduces generalized meshes, a type of meshes suitable for discretizing partial differential equations in non-regular geometries. These meshes extend regular simplicial meshes by allowing for overlapping elements and more flexible adjacency relations. They can have multiple generalized vertices, edges, or faces that occupy the same geometric position. The paper also presents an algorithm for constructing virtually inflated meshes to represent fractured domains and their boundaries.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2023)
Article
Mechanics
Anastasiia Moskaleva, Sergey Gusev, Stepan Konev, Ivan Sergeichev, Alexander Safonov, Enrique Hernandez-Montes
Summary: In modern construction, there is an increasing interest in freeform structures, particularly double curvature shells, due to the development of manufacturing technologies and the use of advanced materials like fiber reinforced polymers. However, the design of these structures with new materials requires new modeling and analysis approaches. This study demonstrates the benefits of fiber reinforced polymers in freeform structures through the example of a composite shell designed with the force density method and topological mapping. The results show the efficiency of this approach and the potential for composites in freeform architecture.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Sy-Ngoc Nguyen, Thuan N. -T. Ho, Duy-Khuong Ly, Jang-Woo Han, Jaehun Lee
Summary: This study presents a novel approach for constitutive modeling of multi-part viscoelastic shell structures, which accurately analyzes the viscoelastic behavior of the structures, reduces computational cost, and provides better performance when modeling thin shell structures.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Aerospace
Antonio Pedivellano, Sergio Pellegrino
Summary: This study aims to develop accurate simulation models for the deployment dynamics of future ultralight deployable structures. It specifically focuses on the packaging and unconstrained deployment of a rectangular space frame made of thin-shell longerons and transverse rods. High-quality test articles were used in experiments conducted with a low inertia and friction suspension system. The study tracked the elastic folds of the structure using high-speed three-dimensional digital image correlation during deployment in both air and near-vacuum conditions. A high-fidelity finite element model was also developed to accurately capture the deployment dynamics and self-latching of the structure, as well as the effects of air on deployment.
JOURNAL OF SPACECRAFT AND ROCKETS
(2022)
Article
Materials Science, Multidisciplinary
Xing Peng, Qiyuan Huang, Yali Zhang, Xiaogang Zhang, Tongtong Shen, Haoyu Shu, Zhongmin Jin
Summary: The research focused on controlling the anisotropy of Gyroid cellular structure (GCS) by changing its geometrical parameters, and discussed the factors affecting the anisotropic elastic response, including structure anisotropy, porosity, and loading direction. Combining the porosity and anisotropic models of GCS can offer a scaffold that matches closely the human bone mechanical environment.
MATERIALS & DESIGN
(2021)
Article
Mechanics
Zahra Soltani, Seyed Ali Hosseini Kordkheili
Summary: This study aims to calculate interlaminar stress distribution in multilayered composite shell structures using a novel nonlinear layer-wise shell finite element formulation. The results are in good agreement with existing literature and simulations conducted with the commercial finite element software Ansys.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Sy-Ngoc Nguyen, Trung Nguyen-Thoi, Minh-Chien Trinh, Thuan Ho-Nguyen-Tan, Jang-woo Han
Summary: This study focuses on the viscoelastic analysis of laminated composite shell structures under long-term creep mechanical loading. A finite element technique called cell/element-based smoothed discrete shear gap method (CS-DSG3) is used to obtain accurate and efficient numerical solutions for elastic and viscoelastic problems. The constitutive equations are transformed into the Laplace domain and then converted back to the real-time domain using inverse Laplace techniques. Various numerical examples are used to validate the method's accuracy and efficiency in studying creep behavior under mechanical loading.
THIN-WALLED STRUCTURES
(2022)
Article
Chemistry, Physical
Yu-Fang Huang, Wen-Chi Huang, Pei-Kai Hsu, Jenn-Ming Song, Alexandre Gloter, Shih-Yun Chen
Summary: This study successfully synthesized magnetically-manipulatable and reusable SERS active buoyant substrates, Ag@SiO2@Fe3O4 composite hollow spheres, which consist of Fe3O4 inner shell, SiO2 outer shell, and Ag nanoparticles on the surface. The hollow structure exhibited stronger SERS signal intensity compared to solid cores, can be easily concentrated and separated under external magnetic field, resulting in a more augmented SERS effect. These ferromagnetic hollow composites also demonstrated the possibility of reusing for SERS measurements.
APPLIED SURFACE SCIENCE
(2021)
Article
Instruments & Instrumentation
Luonan Zhou, Xiaoyang Zheng, Kai Du, Xiaofeng Guo, Qiang Yin, Ai Lu, Yong Yi
Summary: Auxetic lattices with negative Poisson's ratio are seen as potential candidates for sensors, actuators, and optics due to their unique mechanical responses. By designing four types of auxetic lattices based on hollow shell cuboctahedron assembly, experiments and finite element simulations were used to investigate their behavior under uniaxial compression. The results showed that these lattices exhibit buckling with negative Poisson's ratio over a range of volume fractions, and demonstrate high reversibility in compressive loadings, providing insight into energy absorption applications such as body protection equipment and smart packaging materials.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Mathematics, Applied
Haifeng Ji
Summary: This paper presents a lowest-order immersed Raviart-Thomas mixed triangular finite element method for solving elliptic interface problems. The method constructs an immersed finite element by modifying the traditional element and derives important properties and error estimates. Numerical examples are provided to validate the theoretical analysis.
JOURNAL OF SCIENTIFIC COMPUTING
(2022)
Article
Computer Science, Interdisciplinary Applications
M. S. Nashed, J. Renno, M. S. Mohamed
Summary: This paper proposes a novel approach to solve nonlinear stress analysis problems in shell structures using image processing. The approach converts the mechanical behavior of shell structures into images to train a machine learning algorithm, resulting in more efficient prediction of the mechanical behavior of the structure.
ADVANCES IN ENGINEERING SOFTWARE
(2023)
Article
Chemistry, Multidisciplinary
Paul D. Miller, David A. Shultz, Joshua Mengell, Martin L. Kirk, Lukasz Wojtas
Summary: In this study, a series of oligothiophene bis(dioxolene) complexes were synthesized, characterized, and studied. The results showed that the bridge bonding character and electronic structures vary gradually with the number of thiophene bridging units.
Article
Mechanics
Amine Bouterf, Stephane Roux, Francois Hild, Guillaume Vivier, Xavier Brajer, Eric Maire, Sylvain Meille
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2015)
Article
Materials Science, Multidisciplinary
Clemence Petit, Eric Maire, Sylvain Meille, Jerome Adrien, Shingo Kurosu, Aldhiko Chiba
MATERIALS CHARACTERIZATION
(2016)
Article
Materials Science, Multidisciplinary
Clemence Petit, Eric Maire, Sylvain Meille, Jerome Adrien
MATERIALS & DESIGN
(2017)
Article
Materials Science, Multidisciplinary
S. Cottrino, P. Vivies, D. Fabregue, E. Maire
Article
Materials Science, Multidisciplinary
L. Lecarme, E. Maire, A. K. C. Kumar, C. De Vleeschouwer, L. Jacques, A. Simar, T. Pardoen
Article
Mechanics
N. Naouar, E. Vidal-Salle, J. Schneider, E. Maire, P. Boisse
COMPOSITE STRUCTURES
(2014)
Article
Materials Science, Multidisciplinary
T. -S. Cao, E. Maire, C. Verdu, C. Bobadilla, P. Lasne, P. Montmitonnet, P. -O. Bouchard
COMPUTATIONAL MATERIALS SCIENCE
(2014)
Article
Materials Science, Multidisciplinary
A. Etiemble, J. Adrien, E. Maire, H. Idrissi, D. Reyter, L. Roue
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2014)
Article
Chemistry, Physical
Florian Bouville, Eric Maire, Sylvain Meille, Bertrand Van de Moortele, Adam J. Stevenson, Sylvain Deville
Article
Instruments & Instrumentation
Olivier Caty, Philippe Ibarroule, Mathieu Herbreteau, Francis Rebillat, Eric Maire, Gerard L. Vignoles
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2014)
Article
Materials Science, Multidisciplinary
Julien Favre, Damien Fabregue, Eric Maire, Akihiko Chiba
PHILOSOPHICAL MAGAZINE
(2014)
Article
Materials Science, Characterization & Testing
A. Bouterf, S. Roux, F. Hild, J. Adrien, E. Maire, S. Meille
Article
Chemistry, Physical
Katrin Bugelnig, Holger Germann, Thomas Steffens, Federico Sket, Jerome Adrien, Eric Maire, Elodie Boller, Guillermo Requena
Article
Chemistry, Physical
Yasin Amani, Sylvain Dancette, Eric Maire, Jerome Adrien, Joel Lachambre
Article
Chemistry, Physical
Eric Maire, Stanislas Grabon, Jerome Adrien, Pablo Lorenzino, Yuki Asanuma, Osamu Takakuwa, Hisao Matsunaga
Article
Materials Science, Multidisciplinary
Y. Liu, K. Zweiacker, C. Liu, J. T. McKeown, J. M. K. Wiezorek
Summary: The evolution of rapid solidification microstructure and solidification interface velocity of hypereutectic Al-20at.%Cu alloy after laser melting has been studied experimentally. It was found that the formation of microstructure was dominated by eutectic, alpha-cell, and banded morphology grains, and the growth modes changed with increasing interface velocity.
Article
Materials Science, Multidisciplinary
Bharat Gwalani, Julian Escobar, Miao Song, Jonova Thomas, Joshua Silverstein, Andrew Chihpin Chuang, Dileep Singh, Michael P. Brady, Yukinori Yamamoto, Thomas R. Watkins, Arun Devaraj
Summary: Castable alumina forming austenitic alloys exhibit superior creep life and oxidation resistance at high temperatures. This study reveals the mechanism behind the enhanced creep performance of these alloys by suppressing primary carbide formation and offers a promising alloy design strategy for high-temperature applications.
Article
Materials Science, Multidisciplinary
Jian Song, Qi Zhang, Songsong Yao, Kunming Yang, Houyu Ma, Jiamiao Ni, Boan Zhong, Yue Liu, Jian Wang, Tongxiang Fan
Summary: Recent studies have shown that achieving an atomically flat surface for metals can greatly improve their oxidation resistance and enhance their electronic-optical applications. Researchers have explored the use of graphene as a covering layer to achieve atomically flat surfaces. They found that high-temperature deposited graphene on copper surfaces formed mono-atomic steps, while annealed copper and transferred graphene on copper interfaces formed multi-atomic steps.
Article
Materials Science, Multidisciplinary
Jennifer A. Glerum, Jon-Erik Mogonye, David C. Dunand
Summary: Elemental powders of Al, Ti, Sc, and Zr are blended and processed via laser powder-bed fusion to create binary and ternary alloys. The microstructural analysis and mechanical testing show that the addition of Ti results in the formation of primary precipitates, while the addition of Sc and Zr leads to the formation of fine grain bands. The Al-0.25Ti-0.25Zr alloy exhibits comparable strain rates to Al-0.5Zr at low stresses, but significantly higher strain rates at higher stresses during compressive creep testing. Finite element modeling suggests that the connectivity of coarse and fine grain regions is a critical factor affecting the creep resistance of the alloys.
Article
Materials Science, Multidisciplinary
P. Jannotti, B. C. Hornbuckle, J. T. Lloyd, N. Lorenzo, M. Aniska, T. L. Luckenbaugh, A. J. Roberts, A. Giri, K. A. Darling
Summary: This work characterizes the thermo-mechanical behavior of bulk nanocrystalline Cu-Ta alloys under extreme conditions. The experiments reveal that the alloys exhibit unique mechanical properties, behaving differently from conventional nanocrystalline Cu. They do not undergo grain coarsening during extrusion and exhibit behavior similar to coarse-grained Cu.
Article
Materials Science, Multidisciplinary
Yiqing Wei, Jingwei Li, Daliang Zhang, Bin Zhang, Zizhen Zhou, Guang Han, Guoyu Wang, Carmelo Prestipino, Pierric Lemoine, Emmanuel Guilmeau, Xu Lu, Xiaoyuan Zhou
Summary: This study proposes a new strategy to modify microstructure by phase regulation, which can simultaneously enhance carrier mobility and reduce lattice thermal conductivity. The addition of Cu in layered SnSe2 induces a phase transition that leads to increased grain size and reduced stacking fault density, resulting in improved carrier mobility and lower lattice thermal conductivity.
Article
Materials Science, Multidisciplinary
Jia Chen, Zhengyu Zhang, Eitan Hershkovitz, Jonathan Poplawsky, Raja Shekar Bhupal Dandu, Chang-Yu Hung, Wenbo Wang, Yi Yao, Lin Li, Hongliang Xin, Honggyu Kim, Wenjun Cai
Summary: In this study, the structural origin of the pH-dependent repassivation mechanisms in multi-principal element alloys (MPEA) was investigated using surface characterization and computational simulations. It was found that selective oxidation in acidic to neutral solutions leads to enhanced nickel enrichment on the surface, resulting in reduced repassivation capability and corrosion resistance.
Article
Materials Science, Multidisciplinary
X. Y. Xu, C. P. Huang, H. Y. Wang, Y. Z. Li, M. X. Huang
Summary: The limited slip systems of magnesium (Mg) and its alloys hinder their wide applications. By conducting tensile straining experiments, researchers discovered a rate-dependent transition in the dislocation mechanisms of Mg alloys. At high strain rates, glissile dislocations dominate, while easy-glide dislocations dominate at low strain rates. Abundant glissile dislocations do not necessarily improve ductility.
Article
Materials Science, Multidisciplinary
M. S. Szczerba, M. J. Szczerba
Summary: Inverse temperature dependences of the detwinning stress were observed in face-centered cubic deformation twins in Cu-8at.%Al alloy. The detwinning stress increased with temperature when the pi detwinning mode was involved, but decreased when the pi/3 mode was involved. The dual effect of temperature on the detwinning stress was due to the reduction of internal stresses pre-existing within the deformation twins. The complete reduction of internal stresses at about 530 degrees C led to the equivalence of the critical stresses of different detwinning modes and a decrease in the yield stress anisotropy of the twin/matrix structure.
Article
Materials Science, Multidisciplinary
Taowen Dong, Tingting Qin, Wei Zhang, Yaowen Zhang, Zhuoran Feng, Yuxiang Gao, Zhongyu Pan, Zixiang Xia, Yan Wang, Chunming Yang, Peng Wang, Weitao Zheng
Summary: The interaction between the electrode and the electric double layer (EDL) significantly influences the energy storage mechanism. By studying the popular alpha-Fe2O3 electrode and the EDL interaction, we find that the energy storage mechanism of the electrode can be controlled by modulating the EDL.
Article
Materials Science, Multidisciplinary
Matthew R. Barnett, Jun Wang, Sitarama R. Kada, Alban de Vaucorbeil, Andrew Stevenson, Marc Fivel, Peter A. Lynch
Summary: The elastic-plastic transition in magnesium alloy Mg-4.5Zn exhibits bursts of deformation, which are characterized by sudden changes in grain orientation. These bursts occur in a coordinated manner among nearby grains, with the highest burst rate observed at the onset of full plasticity. The most significant burst events are associated with twinning, supported by the observation of twinned structures using electron microscopy. The bursts are often preceded and followed by a stasis in peak movement, indicating a certain "birth size" for twins upon formation and subsequent growth at a later stage.
Article
Materials Science, Multidisciplinary
Vaidehi Menon, Sambit Das, Vikram Gavini, Liang Qi
Summary: Understanding solute segregation thermodynamics is crucial for investigating grain boundary properties. The spectral approach and thermodynamic integration methods can be used to predict solute segregation behavior at grain boundaries and compare with experimental observations, thus aiding in alloy design and performance control.
Article
Materials Science, Multidisciplinary
Feiyu Qin, Lei Hu, Yingcai Zhu, Yuki Sakai, Shogo Kawaguchi, Akihiko Machida, Tetsu Watanuki, Yue-Wen Fang, Jun Sun, Xiangdong Ding, Masaki Azuma
Summary: This study reports on the negative and zero thermal expansion properties of Cd2Re2O7 and Cd1.95Ni0.05Re2O7 materials, along with their ultra-low thermal conductivity. Through investigations of their structures and phonon calculations, the synergistic effect of local structure distortion and soft phonons is revealed as the key to achieving these distinctive properties.
Article
Materials Science, Multidisciplinary
Thomas Beerli, Christian C. Roth, Dirk Mohr
Summary: A novel testing system for miniature specimens is designed to characterize the plastic response of materials for which conventional full-size specimens cannot be extracted. The system has an automated operation process, which reduces the damage to specimens caused by manual handling and improves the stability of the test results. The experiments show that the miniature specimens extracted from stainless steel and aluminum have high reproducibility, and the results are consistent with those of conventional-sized specimens. A correction procedure is provided to consider the influence of surface roughness and heat-affected zone caused by wire EDM.
Article
Materials Science, Multidisciplinary
Rani Mary Joy, Paulius Pobedinskas, Nina Baule, Shengyuan Bai, Daen Jannis, Nicolas Gauquelin, Marie-Amandine Pinault-Thaury, Francois Jomard, Kamatchi Jothiramalingam Sankaran, Rozita Rouzbahani, Fernando Lloret, Derese Desta, Jan D'Haen, Johan Verbeeck, Michael Frank Becker, Ken Haenen
Summary: This study investigates the influence of film microstructure and composition on the Young's modulus and residual stress in nanocrystalline diamond thin films. The results provide insights into the mechanical properties and intrinsic stress sources of these films, and demonstrate the potential for producing high-quality nanocrystalline diamond films under certain conditions.