Article
Engineering, Mechanical
Vinay Goyal, Jacob Rome, Dhruv N. Patel
Summary: An experimental and analytical study was conducted to understand the tensile failure mechanisms in asymmetrical tapered sandwich core structures at cold temperatures. The study revealed the significant influence of cure stresses in the foam, which should not be ignored, and successfully predicted the failure initiation location.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Mechanics
Kenan Cinar, Okan Inam
Summary: L-shaped laminates with a syntactic foam core were studied for their bending behavior, including sharp corners. Through four-point bending tests and finite element method, the bending behavior and failure modes of the sandwich structure were analyzed. Different models were used to simulate inter-laminar and intra-laminar failure, as well as the behavior of the foam material. The predictions of load-displacement curves and strain fields were in good agreement with experimental results, and the failure mechanisms were captured well using the model.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Honglei Xie, Wanjin Li, Hai Fang, Shijiang Zhang, Zhixin Yang, Yuan Fang, Feng Yu
Summary: This study fabricated curved sandwich beams (CSBs) and conducted experiments to investigate their flexural behaviors. It was found that the usage of PET foam in CSBs can prevent core shearing failure and decrease load-displacement response. The results also showed that decreasing curvature led to a decrease in the ultimate load-bearing capacity and stiffness of the CSBs.
COMPOSITE STRUCTURES
(2024)
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
Polymer Science
Andrzej Komorek, Pawel Przybylek, Robert Szczepaniak, Jan Godzimirski, Marek Roskowicz, Szymon Imilowski
Summary: Composite materials, especially sandwich composites, are widely used in the construction of means of transport due to their low density and high stiffness. This study conducted static and dynamic tests to investigate the effect of density and core thickness on the mechanical properties of sandwich composites. The results showed that the core material significantly influenced the strength parameters of the composites, and different polymer foam cores had different adhesive properties. Thicker cores with higher density were found to improve the impact strength and puncture resistance of the sandwich composites.
Article
Materials Science, Composites
Selwyn Jebadurai Devaraj, Arul Jeya Kumar Arputham
Summary: In this study, the interfacial bonding between face sheets and core in sandwich composites was strengthened by introducing chopped fibers. The sandwich specimens with chopped glass fibers showed improved mechanical properties, with significantly increased flexural and compressive strength.
POLYMER COMPOSITES
(2022)
Article
Engineering, Multidisciplinary
Haitao Zhang, Xupeng Fan, Weijun Chen, Yubo Wang, Changwei Liu, Baojun Cui, Gang Li, Junjun Song, Daoxiang Zhao, Daming Wang, Liwei Zhao, Xiao Zhang, Huikang Xu, Chunhai Chen
Summary: The study successfully fabricated thermoplastic PI foams with excellent thermal-insulating properties and temperature resistance by linking flexible blocks into rigid polymeric structures through a simple aqueous strategy to construct hydrogen-bonding networks.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Mechanical
Mikayla Aowad, Arnob Banik, Chao Zhang, Isaiah Kaiser, Mahfujul Haque Khan, Ana Clecia Alves Almeida, Daria Lazarenko, Fardin Khabaz, Kwek-Tze Tan
Summary: This study investigates the performance of three types of foam core materials used in composite sandwich structures at various densities, including H60, H100, F50, F90, PN115, PN200, and PN250. The relationships between material and flexural properties at both room temperature and low temperature Arctic conditions are determined through three-point bending tests. X-ray micro-computed tomography is used to observe the microstructural relationships between foam density and mechanical properties of the core. Statistical analysis, contour plots, and linear regression equations are utilized to predict flexural properties as a function of temperature and foam density. Molecular dynamics simulation is employed to verify experimental results and understand the effect of temperature on material behavior. This study provides a deeper understanding of the relationship between flexural strength and foam density, contributing to existing knowledge on foam strength properties.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Review
Polymer Science
Santosh Kumar Sahu, P. S. Rama Sreekanth, S. V. Kota Reddy
Summary: This review focuses on the various designs and manufacturing methods of sandwich structures, including different types of core designs and face sheet fabrication materials, as well as joining methods. The article also addresses the challenges in the fabrication of sandwich structures and provides insights into the future development of advanced composite sandwich structures.
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Construction & Building Technology
Sensen Li, Hualin Fan
Summary: By filling Expanded Polystyrene (EPS) foamed concrete, pultruded sandwich panels (PSPs) become stiffer and stronger, changing the failure mode and significantly improving the flexural load capacity. Theoretical analyses predict the performance of foam-filled PSPs, while factors affecting their failure pattern and flexural load capacity are discussed.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Engineering, Mechanical
Huihui Wang, Xuding Song, Mingkai Zhao, Yipin Wan
Summary: This study aims to explore the low velocity penetration dynamic response of foam aluminum sandwich panels. A three-stage penetration model is established based on experimental results. The load and displacement time history, energy absorption and initial failure mode of the sandwich panel during penetration are theoretically predicted using the principle of energy conservation, minimum potential energy and accumulating damage theory. Comparison with experimental results shows that the predicted failure load and deformation are within 10% of the experimental data. This paper provides an analytical method for studying the deformation failure mode and energy absorption mechanism of metal foam sandwich panels, which is helpful to improve the efficiency of metal foam sandwich panels in design.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Review
Materials Science, Multidisciplinary
Joel Galos, Raj Das, Michael P. Sutcliffe, Adrian P. Mouritz
Summary: This paper reviews the research on the applications, manufacturing, properties, and performance of sandwich structures with balsa wood cores. Balsa wood offers advantages such as environmental sustainability, low cost, excellent mechanical properties, and thermal insulation. However, challenges including global supply chain issues and limitations in processing techniques, as well as impact, blast, fire, and water durability, need to be addressed. The paper also discusses future research directions for balsa structural sandwich materials.
MATERIALS & DESIGN
(2022)
Article
Mechanics
S. Alsubari, M. Y. M. Zuhri, S. M. Sapuan, M. R. Ishak
Summary: A novel double cell wall interlocking square core was fabricated from flax fibre reinforced polylactic acid composite. Experimentally, the effect of using double cell walls, different cell sizes, and foam-filled core structure on the compressive strength and specific energy absorption was investigated.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Ehsan Ahmadi, Amir Atrian, Javad Jafari Fesharaki, Hamid Montazerolghaem, Saeid Saberi
Summary: This study investigates the high-velocity impact behavior of new designed sandwich structures using experimental and numerical methods. A numerical model with high accuracy is developed to predict the mechanical properties of the materials and assess the impact behavior. The experimental validation confirms the effectiveness and accuracy of the numerical model.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)