Article
Engineering, Mechanical
Michelle S. Hoo Fatt, Chong Zhong, Prasanna C. Gadepalli, Xiaolong Tong
Summary: This study aimed to characterize the multiaxial, elastic-plastic, and hysteresis behavior of Divinycell PVC H100 foam using a novel pressure vessel experiment. The foam exhibited elastic-plastic response, damage, and viscoelastic hysteresis under different stress states, with the Tsai-Wu failure criterion showing superior predictive performance for triaxial yielding. Based on the experimental results, an elastic-plastic, viscoelastic damage model was developed to describe the foam's behavior.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Mechanics
Jiahao Kong, Haoyue Han, Tao Wang, Guangyan Huang, Zhuo Zhuang
Summary: This paper introduces a phase-field model for polymer foam materials by combining the phase-field method with the crushable foam model. The model is calibrated using experimental data and successfully simulates the fracture processes of polyurethane under different loading conditions. The study is important for the engineering applications of polymer foam materials.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Engineering, Mechanical
Jacob Marx, Afsaneh Rabiei
Summary: Steel-steel composite metal foam (SS-CMF) and composite metal foam core sandwich panels (SS-CMF-CSP) were manufactured and tested, showing that SS-CMF had higher strength compared to other metal foams due to its uniform porosities and strong bonding between the sphere wall and matrix. The SS-CMF-CSP, made by solid-state diffusion bonding stainless steel face sheets to a SS-CMF core, exhibited even higher strength than the bare SS-CMF, with the experimental results falling within the calculated upper and lower bounds for modulus of elasticity.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Bharat Bhushan Bhatt, Lokesh Kumar, Ashok Kushwaha, Dipti Gupta
Summary: Researchers have successfully developed an ultracompressive foam sensor with large area conductive flakes to address the issue of variable sensitivity in previously reported compressive piezoresistive foam sensors. The new sensor exhibits stable performance over a wide compression range, providing constant gauge factor and superior detectability for both small and large body movements. Additionally, the sensor demonstrates excellent sensitivity, short relaxation time, and stable operation under various environmental conditions, including underwater.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Materials Science, Textiles
Shinde Avinash, Siva Irulappasamy, Chithirai Pon Selvan, M. T. H. Sultan, Lee Seng Hua, Yashwant Munde
Summary: The study focuses on optimizing the abrasive machining parameters of natural fiber reinforced sandwich composite. By comparing the experimental results and observing surface damage through scanning electron microscopy, the feasibility of the research was validated.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Engineering, Mechanical
L. Alonso, A. Solis
Summary: A theoretical energy-based model was developed to capture the ballistic response of sandwich structures made of composite material peels and a crushable foam core. The model was based on wave propagation theory and divided into six stages with corresponding energy-absorption mechanisms, showing the general trends in terms of their relative importance at velocities below, near and above the ballistic limit. The model was validated against experimental results, demonstrating good agreement in terms of impact-residual velocity curve.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Materials Science, Composites
Md Asif Rezwan Shishir, Zhaoyuan Zhang, Deng'an Cai, Xinwei Wang, Qinghua Xu
Summary: This study presents numerical and experimental analysis of free vibrations in cylindrical polymer pin-reinforced foam core sandwich composite panels with different core thicknesses. The results show that the pin-configuration with higher pin density and larger pin diameter yields higher natural frequencies. The study also demonstrates the influence of core thickness on the natural frequencies.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
Umut Caliskan, Munise Didem Demirbas, Omer Erdogan
Summary: This study investigated the performance of sandwich panels with two different core materials and aluminum alloy face sheets under low-velocity impact through experimental and numerical analysis. The contact and impact resistance were examined by analyzing the changes in contact force and kinetic energy. The findings showed that the face-sheet thickness was an important parameter affecting the impact behavior, with polystyrene foam being more effective in preventing impact damage.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
Elias A. Toubia, Sangwook Sihn, Jeremey Pitz, Jonathan P. Vernon, Mark Flores, Stetson Parks
Summary: The study explores the thermal impact of laser processing on composite sandwich structures, investigating the effects on mechanical properties and failure modes based on different parameters. Thermal-induced damage significantly affects edgewise compression strengths and failure modes of the composite structures, as evidenced by experimental results and IR camera technology.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Hui Li, Bocheng Dong, Jichuan Cao, Jing Zhao, Jian Xiong, Yao Yang, Dongxu Du, Wei Sun, Xiangping Wang, Haihong Wu
Summary: In this study, a novel lightweight composite sandwich cylindrical shell (ACSCS) with a hollow grille core (HGC) filled with polyurethane foam (PF) is designed and prepared. The study investigates its free and forced vibration behaviors for the first time. An analytical model is developed using various theories and approaches, and the solution procedures for the natural frequencies, mode shapes, and vibration responses are defined. Both literature and experimental validations are conducted, and the effects of critical parameters on the vibrations are studied. The research provides insights for the application of such shell structures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Mechanics
Keyu Zhu, Xitao Zheng, Cong Zhang, Niu Chen, Yagang Han, Leilei Yan, M. Quaresimin
Summary: A novel all-composite sandwich panel with channel core was proposed to enhance compressive strength and energy absorption characteristics. Experimental and numerical analysis results showed that the proposed structure exhibited better compressive strength and specific energy absorption compared to the traditional corrugated core sandwich panel. Further optimization of the structural efficiency through foam filling significantly increased the compressive strength and energy absorption.
COMPOSITE STRUCTURES
(2022)
Article
Multidisciplinary Sciences
M. J. Khoshgoftar, A. Barkhordari, M. Limuti, F. Buccino, L. Vergani, M. J. Mirzaali
Summary: Sandwich panel structures with re-entrant core lattices have been studied for their mechanical properties. The study investigated the response of a three-layered sandwich plate with a re-entrant core lattice under flexural bending, analyzing the effects of different geometrical parameters of the lattice structures. The results showed that the core structures with auxetic behavior resulted in higher bending strength and minimum out-of-plane shear stress, indicating their potential for advanced engineering applications in aerospace and biomedical fields.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Marine
Feng Wan, Feng Guan, Yibo Deng, Shaohu Liu, Yonghui Liu, Peng Huang
Summary: The study investigates the denting behavior of sandwich pipes in deepwater environment through numerical simulations and parametric studies, revealing the influence of factors such as internal and external pressure, tip radius, width and orientation of the denting tool on the pipe's denting response.
Article
Engineering, Civil
Wei Huang, Liangzhan Lu, Zihao Fan, Wei Zhang, Jiayi Liu, Caiyu Yin
Summary: The foam-reinforced sandwich structure shows superior underwater impulsive resistance compared to the unreinforced counterpart, significantly increasing energy absorption capacity and playing a crucial role in failure modes and energy absorption mechanisms of the composite lattice sandwich structures.
THIN-WALLED STRUCTURES
(2021)
Article
Chemistry, Inorganic & Nuclear
Mingzhu Liu, Senyang Wang, Ying Cao, Chengyang Liang, Shitong Geng, Haipeng Guo, Ying Liu, Yanhong Luo, Wenming Zhang, Ling Li
Summary: An amorphous sheet-raspberry sandwich-like ZnCo2S4@MnCo2S4/CP composite material was synthesized as a counter electrode for dye-sensitized solar cells (DSSCs) using a three-step hydrothermal method. The amorphous composites exhibited lower charge transfer resistance, improved fill factor, and short-circuit current density, attributed to the unique structure, smooth ion transport interface, and dual catalytic performance of the Zn, Co, and Mn composites. When used as the counter electrode, the composite material achieved a high photoelectric conversion efficiency of 11.68%. This study provides a design idea for amorphous materials in terms of catalytic performance and an alternative to Pt electrodes.
DALTON TRANSACTIONS
(2023)