Results 61 to 70 of about 20,023 (249)

Fracture behavior of polyetherimide (PEI) and\ud interlaminar fracture of CF/PEI laminates at elevated\ud temperatures [PDF]

open access: yes, 2005
To investigate the effects of environmental temperature\ud on fracture behavior of a polyetherimide (PEI) thermoplastic polymer and its carbon fiber (CF/PEI) composite,experimental and numerical studies were performed on compact tension (CT) and double ...
Kim, Ki-Young, Yan, Cheng, Ye, Lin
core   +1 more source

Neuromorphic Devices and Computing for Sensing, Memory, and Control

open access: yesAdvanced Science, EarlyView.
This review introduces neuromorphic devices made from diverse materials. These devices mimic neuronal functions and architectures and, when integrated with artificial or biological computing, can form closed loops with neurons for pressure, optical, acoustic, and biochemical sensing and modulation.
Zhengguang Zhu   +2 more
wiley   +1 more source

Cross‐scale Material‐Structure Synergy for 2D Metamaterials: Toward Customizable Intelligent Electromagnetic Manipulation in Multiphysics Fields

open access: yesAdvanced Science, EarlyView.
Recent advances in metasurface‐enabled low‐observable technologies are reviewed from the perspective of cross‐scale material–structure synergy. Electromagnetic, thermal, optical, and acoustic stealth are highlighted together with dynamic tuning, programmable coding, data‐driven inverse design, artificial intelligence, multispectral compatibility, and ...
Shuhao Wang   +5 more
wiley   +1 more source

High‐Performance Bio‐Based Epoxy Vitrimers and Composites: Synergizing Robustness and Reprocessability via Fractional Free Volume Regulation

open access: yesAdvanced Science, EarlyView.
In this work, two bio‐based epoxy monomers were designed to tune the dynamic network of a rigid–flexible hybrid epoxy through free‐volume control, achieving a synergy among high free volume, high cross‐linking density, and segmental mobility while balancing strength and toughness.
Kai Dong, Di Zhao, Chengji Zhao
wiley   +1 more source

Development of a Degradation Model for the Collapse Analysis of Composite Aerospace Structures [PDF]

open access: yes, 2006
For stiffened structures in compression the most critical damage mechanism leading to structural collapse is delamination or adhesive disbonding between the skin and stiffener.
Adrian C. Orifici   +9 more
core  

Design principles for vitrimers: Linking dynamic covalent chemistry, network architecture, and engineering performance

open access: yesBulletin of the Korean Chemical Society, EarlyView.
This review examines vitrimer performance from a broader perspective, considering not only dynamic covalent chemistry but also molecular structure, network architecture, and rheological behavior. These factors are discussed in relation to service and processing windows, reprocessing, repair, and engineering applications, providing a multiscale ...
Kyosun Ku, Hyeonuk Yeo
wiley   +1 more source

Symmetry Breaking of FeN4 by Interlaminar Oxygen‐Bonded Vacancy Defect Toward Efficient Oxygen Reduction Reaction

open access: yesEcoEnergy, EarlyView.
The adjacent vacancy defect bonded with interlaminar oxygen breaks the symmetry of FeN4 active site, facilitating the *OH desorption and lowering the reaction overpotential, ultimately enhancing the intrinsic catalytic activity of the Fe center. ABSTRACT Developing highly efficient non‐noble iron‐nitrogen‐carbon (Fe‐N‐C) catalysts with FeN4 active ...
Liqun Liu   +6 more
wiley   +1 more source

Percutaneous Endoscopic Interlaminar Lumbar Discectomy for a Far Inferiorly Migrated Massive Lumbosacral Disc Fragment (8.5 cm) Causing Near-Complete Canal Occupancy: A Case Report with 3-Month Follow-up and Technical Review

open access: yesIndian Journal of Pain
High-grade inferiorly migrated disc herniations at the lumbosacral junction are technically challenging for endoscopic surgery because of anatomical constraints, transitional vertebrae, and the steep caudal trajectory needed to reach far-migrated ...
Sushil Kumar Jaiswal   +4 more
doaj   +1 more source

Mode I interlaminar crack length prediction by the resistance signal of the integrated MWCNT sensor in WGF/epoxy composites during DCB test

open access: yesJournal of Materials Research and Technology, 2020
The interlaminar peformance of composites palys an important role in the damage process of fiber reinforced composites. In-situ monitoring by an embedded sensor could avoid the sudden failure.
Yun Wan   +8 more
doaj   +1 more source

Effects of Free Edge Interlaminar Shear Stress on the Residual Stresses of Polymer Composites Using Hole Drilling Method [PDF]

open access: yesعلوم و تکنولوژی پلیمر, 2007
In the traditional hole drilling method the in-plane stresses are studied in detail and the interlaminar stresses are not taken seriously. The interlaminar stresses on the free edge of composite materials are important and can cause matrix cracking and ...
M.M. Shokrieh, A.R. Ghasemi
doaj   +1 more source

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