Article
Mechanics
Xiaohong Wang, Zhiqiang Zhong, Tao Zeng, Guodong Xu, Yuhua Cui, Kun Zhang
Summary: An analytical model for predicting the heat transfer in C/SiC composite pyramidal lattice core sandwich structures is proposed, taking into account the radiation emitted from the struts. The model considers the temperature gradient in the thickness direction of the lattice core sandwich structures. Comparisons with experimental data and analytical results indicate that the effect of radiation emitted from the struts on the equivalent thermal conductivity becomes more significant at high temperature and should not be overlooked. The proposed model provides a more accurate estimation of the high-temperature equivalent thermal conductivity of pyramidal lattice core sandwich structures compared to models that neglect the radiation of struts. The effects of geometry, solid emissivity, and temperature on the equivalent thermal conductivity of pyramidal lattice core sandwich structures are also thoroughly discussed.
COMPOSITE STRUCTURES
(2022)
Review
Engineering, Multidisciplinary
Vinh Tung Le, Ngoc San Ha, Nam Seo Goo
Summary: This paper provides a comprehensive review of recent research efforts on sandwich structures for thermal protection systems (TPS) in hypersonic vehicles, discussing topics such as structural and material design, mechanical performance, and manufacturing methods. The research shows that in the development of hypersonic vehicles, the application of sandwich structures in TPS has become increasingly important.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Physical
Asad Ali, Young-Han Shin
Summary: In this study, we utilized USPEX and VASP to discover three new structures of 2D GexSy compounds, and analyzed their electronic structures and thermal conductivity properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Ji-Hong Zhu, Tao Liu, Wei-Hong Zhang, Yu-Lei Wang, Jin-Tao Wang
Summary: This paper presents a concurrent optimization scheme to suppress structural resonance response by simultaneously optimizing the damping material topology in the viscoelastic layers and the size distribution of the lattice core in sandwich structures. The damping effect is simulated as a hysteretic damping model and full method is used to accurately calculate dynamic responses. Design sensitivities are efficiently derived based on the adjoint method and the Globally Convergent Method of Moving Asymptotes algorithm is adopted.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Engineering, Civil
Shengbo Shi, Yong Chen, Cunxi Dai, Jun Liang
Summary: This study focuses on the development of structurally integrated thermal protection systems (SITPS) for next generation aerospace vehicles, using an all-composite sandwich structure with corrugated core. Analytical and finite element models are developed to analyze heat transfer and surface ablation, with experimental validation confirming the accuracy of the proposed models for rapid preliminary design.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Yuewu Wang, Haotian Liu, Jihou Yang, Tairan Fu
Summary: In this study, the nonlinear thermally induced transient response of lattice core sandwich plates under sudden heat flux is investigated for the first time. By considering thermal conduction within the trusses and heat radiation in the cells, the equivalent thermal conductivity of the lattice core sandwich plates is determined. The transient temperature field along the thickness direction of the plate is calculated using the central finite difference method, and the displacement fields of the facesheets and lattice core layer are modeled using plate theory and deformation theory, respectively.
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
Thermodynamics
Xiaohong Wang, Tao Zeng, Guodong Xu, Kun Zhang, Siwen Yu
Summary: An analytical model is presented to predict the equivalent thermal conductivity of the pyramidal lattice core sandwich structure. The model is more accurate in estimating thermal conductivity and discusses the effects of various parameters on the equivalent thermal conductivity.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Shuyao Lin, Chen Shen, Hongbin Zhang
Summary: Based on density functional theory (DFT) calculations, the thermal conductivities of LiBeP in both the ferroelectric (FE) and anti-ferroelectric (AFE) phases have been evaluated using the self-consistent phonon method (SCP) combined with the compressive sensing (CS) approach. It is found that the thermal conductivities can be tailored by more than 50% at room temperature upon the FE-AFE phase transitions. Analysis on the phonon modes and scattering space reveals significant anharmonic effects in LiBeP. The significant change of the thermal conductivity makes it a promising candidate for thermal management materials with tunable thermal conductivities by electric fields.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Physical
Thomas A. R. Purcell, Matthias Scheffler, Luca M. Ghiringhelli
Summary: Accurate and explainable AI models are promising tools for accelerating the discovery of new materials. The SISSO algorithm, with its deterministic nature, expands the range of possible descriptors by introducing a new representation of mathematical expressions and controlled nonlinear optimization. Improvements in solver algorithms for regression and classification also enhance the reliability and efficiency of SISSO.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Thermodynamics
Xin Xue, Yunlingzi Xiong, Fang Wu, Ruixian Wu, Niuniu Liu
Summary: This work analyzes the heat transfer characteristics of a metal-rubber core sandwich cylindrical shell (SCS-MR) using finite element analysis and experimental techniques. The SCS-MR is suitable for construction in varying conditions and exhibits high-temperature resistance. Thermal resistance and Fourier law were used to analyze heat transfer, heat flux, and thermal convection loss. A representative volume element of the SCS-MR was simulated for thermal transfer, and comparative experiments measured temperature gradients, boundary conditions, and density. Differential scanning calorimeter (DSC) was used to examine different metal spirals. Experimental analysis revealed that the SCS-MR had faster heat transfer rate compared to the solid cylindrical shell (CS) and that the insulation cover minimized the impact of natural convection. The thermal conductivity of the scaled model SCS-MR decreased with increasing density in high-temperature environments.
APPLIED THERMAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Tianchi Zhang, Xiaosheng Cheng, Ce Guo, Ning Dai
Summary: This paper proposes a toughening design method based on the failure modes of lattice sandwich structures. The toughening model is established, the dimensional effect is analyzed, and the mechanism of synergistic toughening is studied. The results show that the mass of the designed sandwich structure is reduced by 67.7% compared with the solid part with the same outline sizes, and its impact toughness is increased by 119.0%.
MATERIALS & DESIGN
(2023)
Article
Engineering, Mechanical
M. Nuno, J. Buehring, M. N. Rao, K-U Schroeder
Summary: Sandwich structures exhibit higher bending stiffness compared to monolithic structures with similar weight, making them ideal for lightweight applications. This study investigates delamination testing of additive manufactured sandwich structures and provides design guidelines to prevent delamination. The research results in critical insights for understanding the failure modes and strength of these structures.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Vinay Damodaran, Anna G. Hahm, Pavana Prabhakar
Summary: The paper proposes a novel design and fabrication strategy for producing architected structures as the core in composite sandwich structures, which can dissipate energy and exhibit structural recovery. The mechanical response and design parameters relationship of conical unit cells are investigated, showing that the structures with curved sidewalls can dissipate energy and recover from deformation. The study demonstrates that the buckling strength and post-buckling stability of these structures are influenced by geometric parameters, providing insights for their applications in engineering materials.
MATERIALS & DESIGN
(2021)
Article
Mechanics
D. K. Korupolu, P. R. Budarapu, V. R. Vusa, M. K. Pandit, J. N. Reddy
Summary: This study investigates the performance of enhanced hierarchical honeycomb core cellular structures under compression and impact loads by proposing a hierarchical scheme of varying the order and level of the cells. The development of hierarchical patterns enhances the load-bearing capacity and introduces a novel second order second level hexagon based hybrid cell.
COMPOSITE STRUCTURES
(2022)
Article
Endocrinology & Metabolism
Li Xi, Yi Zhang, Himadri Gupta, Nick Terrill, Pan Wang, Tian Zhao, Daining Fang
Summary: Glucocorticoid-induced osteoporosis is a major form of secondary osteoporosis, increasing the risk of fractures in patients. This study used multi-scale experimental techniques to reveal specific material-level changes in GIOP patients, providing insight into the altered structure-property relationship leading to mechanical abnormalities.
Article
Materials Science, Multidisciplinary
Feiyu Xiong, Chenyang Huang, Orion L. Kafka, Yanping Lian, Wentao Yan, Mingji Chen, Daining Fang
Summary: An integrated modeling framework involving discrete element method, finite volume method, and extended cellular automaton method is proposed to study grain growth and microstructure evolution in powder bed fusion additive manufacturing. The simulation results are qualitatively consistent with experimental observations, demonstrating the effectiveness of the modeling framework in understanding and controlling microstructural development.
MATERIALS & DESIGN
(2021)
Article
Mechanics
Ke Yuan, Kai Liu, Zhonggang Wang, Kai Wei, Mingzhi Yang
Summary: This study investigates the influence of mass and dimension of rigid projectiles on the damage behaviors of carbon fiber reinforced plastic (CFRP) laminates. Experimental impact tests and numerical modeling are conducted, revealing that projectile dimension is related to penetration and delamination mode of CFRP, while projectile mass affects dynamic deformation.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
P. Wang, K. F. Wang, B. L. Wang, L. Xi, K. Sano, T. Shimada, H. Hirakata, D. N. Fang
Summary: This study aims to stably and accurately measure the interlaminar fracture toughness (IFT) of multilayered Bi2Te3 for evaluating the reliability of its thermoelectric devices. By developing a tapered cantilever bending (TCB) experiment, the measurement of IFT for Bi2Te3 was successfully achieved, providing a new method for assessing multilayered materials.
EXPERIMENTAL MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Ruishen Lou, Huimin Li, Jiehua Zhong, Chun Zhang, Daining Fang
Summary: A model for bond formation in the FDM process was studied, showing the importance of fidelity to initial configuration and boundary conditions during the bonding process. Gravity has contrasting effects on bonds in the vertical and horizontal directions, requiring a balance between utilizing gravity to enhance bonding and maintaining dimensional accuracy.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Composites
Qiubo Li, Yihui Chen, Yanfei Chen, Shigang Ai, Daining Fang
Summary: This study aims to investigate the effect of void defects on the failure behavior and strength of C/SiC composites. Micro-computed tomography and finite element models were used to study the influence of void volume fractions and geometry on the materials. This research is important for better understanding the impact of defects on the mechanical behavior of composite materials.
APPLIED COMPOSITE MATERIALS
(2022)
Article
Mechanics
Dong Wu, Zeang Zhao, Hongshuai Lei, Hao-Sen Chen, Qiang Zhang, Panding Wang, Daining Fang
Summary: Natural tissues can self-strengthen through biological growth, while synthetic materials are typically static. The concept of bio-inspired materials aims to develop materials with dynamically programmable performances. A solvent-free elastomer composite system is proposed in this study, which can be strengthened through tunable self-growth cycles and is compatible with Digital Light Processing (DLP) 3D printing for fast manufacturing of high-precision structures.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Composites
Chunwang He, Jingran Ge, Xiaofei Cao, Yanfei Chen, Haosen Chen, Daining Fang
Summary: Manufacturing uncertainties in composites, such as carbon fiber deviations and voids, can impact mechanical properties. Although experiments have been conducted, quantitative characterization of fiber radius and shape deviations, and matrix void content, remain a challenge. A computational micromechanics study was conducted to understand the effects of manufacturing uncertainties on the mechanical behavior of UD composites under different loading conditions. The methodology involved establishing constitutive laws for constituents, modeling RVEs with deviations based on observations, and predicting stress-strain curves and failure modes.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Composites
Yujia He, Ming Mei, Kai Wei, Xujing Yang, Shuyong Duan, Xu Han
Summary: The study found that changes in stitching pattern and space influence the interlaminar shear performance and damage suppression mechanism of stitched composites. Reduction in stitching space enhances shear performance, while appropriate stitching patterns can increase the final load and suppress damage propagation.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Yanfei Chen, Shigang Ai, Pan Wang, Daining Fang
Summary: A physically based constitutive model for braided silicon carbide ceramic matrix composites (CMCs-SiC) at ultra-high temperature is developed, considering material orthotropy, temperature effect, tension-compression asymmetry, and crack closure effect. The model, implemented using a return mapping algorithm, shows good agreement with experimental data in predicting stress-strain relationships at different stress states and temperatures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Jiaxin Chen, Hongtao Wang, Kaiyu Wang, Zhuoyi Wei, Wentao Xu, Kai Wei
Summary: The study analyzes the mechanical performances of a series of lightweight metamaterials and finds that enhanced mechanical properties including high stiffness and strength can be achieved by adjusting cell geometries and base materials, especially Category A metamaterials show excellent geometrically independent yield and buckling strengths. The research provides references for avoiding potential failures by identifying failure modes and criteria under various loadings, geometries, and base materials, and reveals that tailored CTE, relative density, stiffness, and strength performances make the metamaterials suitable for fulfilling customized engineering requirements, with metamaterial BH particularly suitable for low CTE, low density, high stiffness, and strength applications.
MECHANICS OF MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Jixiang Qi, Zihao Chen, Peng Jiang, Wenxia Hu, Yonghuan Wang, Zeang Zhao, Xiaofei Cao, Shushan Zhang, Ran Tao, Ying Li, Daining Fang
Summary: Active mechanical metamaterials combine mechanical metamaterials with smart materials for superior performance, with structures designed based on principles such as phase transition and strain mismatch. External stimuli like temperature, chemicals, and light are used for control and efficiency.
Article
Chemistry, Physical
Shuo Yang, Qidong Yang, Zhaoliang Qu, Kai Wei
Summary: This study investigates the influence of manufacturing defects on the mechanical behavior of LPBFed Invar 36 alloy fabricated at different scanning speeds. The presence of different defects leads to differences in plastic deformation and brittle failure behavior of the alloy.
Article
Chemistry, Physical
Jianqin Wu, Lu Zhang, Wenqing Wang, Ruyue Su, Xiong Gao, Suwen Li, Gang Wang, Rujie He
Summary: This study presents a novel method for preparing porous SiC ceramics using DIW process, and investigates their mechanical and wave absorption properties. The nozzle diameter has an important role in maintaining the structure of the SiC green part, while the sintering temperature affects the porosity and compressive strength of the porous SiC ceramics. Porous SiC ceramics sintered at 1650 degrees C exhibit high strength and excellent EM wave absorption properties.
Article
Multidisciplinary Sciences
Handong Jiao, Zhaoliang Qu, Shuqiang Jiao, Yang Gao, Shijie Li, Wei-Li Song, Haosen Chen, Hongmin Zhu, Rongqi Zhu, Daining Fang
Summary: High-temperature electrochemistry is widely used but real-time observations and in-depth understanding of its evolution are limited. In this study, a high-temperature electrolysis facility with in situ x-ray computer microtomography was developed to probe the dynamic evolution of electrodes. The results provide insights into the efficiency and mechanisms of the process, as well as real-time optimization.
Article
Thermodynamics
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)