Results 81 to 90 of about 129,728 (312)

Ammonium Salts as Curing Agents to Obtain Ionic Epoxy Resins With a Thermoplastic‐to‐Thermoset Transition

Advanced Materials, EarlyView.
Ionic epoxy networks are prepared using ammonium salts as hardeners, leading to a two‐stage curing process with a thermoplastic‐like intermediate. This uncommon behavior enables extrusion and fabrication of thermoplastic prepregs that can be cured into thermoset composites.
Izabela Kurowska, Leire Unanue, Itxaso Calafel, Dorleta Otaegui, Jorge L. Olmedo‐Martínez, Lourdes Irusta, Daniel Vinagre, Nora Aranburu, Nerea Casado, Ibon Odriozola, David Mecerreyes   +10 more
wiley   +1 more source

Measurement of the time-temperature dependent dynamic mechanical properties of boron/aluminum composites [PDF]

A flexural vibration test and associated equipment were developed to accurately measure the low strain dynamic modulus and damping of composite materials from -200 C to over 500 C.
Dicarlo, J. A., Maisel, J. E.
core   +1 more source

Beyond Earth: Resilience of Quasi‐2D Perovskite Solar Cells in Space

Advanced Materials, EarlyView.
In the article (DOI: 10.1002/adma.202520433), Christoph Putz and co‐workers demonstrate rigid quasi‐2D perovskite solar cells operating in low Earth orbit, delivering stable power for more than 100 days under real‐space conditions. In‐orbit performance is correlated with extensive ground‐based thermal and proton‐irradiation studies on rigid and ...
Christoph Putz, Lukas E. Lehner, Stepan Demchyshyn, Bekele Hailegnaw, Phillip Jahelka, Magdalena Breitwieser, Sercan Özen, Andrea Denker, Jürgen Bundesmann, Alina Hanna Dittwald, Dilara Karabulut, Philipp Tockhorn, Steve Albrecht, Felix Lang, Markus C. Scharber, Michael D. Kelzenberg, Harry A. Atwater, Martin Kaltenbrunner   +17 more
wiley   +1 more source

Integration of Finite Element Analysis and Machine Learning for Assessing the Spatial-Temporal Conditions of Reinforced Concrete

Buildings
Composite reinforcements are attracting attention in the reinforced concrete (RC) field for their high corrosion resistance, low thermal conductivity, and low electromagnetic interference behavior. However, compared to metallic reinforcements, composites
Junyi Duan, Huaixiao Yan, Chengcheng Tao, Xingyu Wang, Shanyue Guan, Yuxin Zhang   +5 more
doaj   +1 more source

Self‐Powered Flexible Triboelectric‐Gated Ion‐Gel Transistor for Neuromorphic Tactile Sensing and Human Activity Recognition

Advanced Materials, EarlyView.
A fully flexible ion‐gel‐gated graphene‐channel transistor driven by a triboelectric nanogenerator enables self‐powered tactile sensing and synaptic learning. Mimicking spike‐rate‐dependent plasticity, the device exhibits frequency‐selective potentiation and depression, supporting rate‐coded neuromorphic computation even under flex.
Hanseong Cho, Seoyeon Park, Youngmin Lee, Sejoon Lee   +3 more
wiley   +1 more source

Experimental and Statistical Study of Flexural Strength in Concrete using Novel Kaolinite Coal [PDF]

E3S Web of Conferences
The purpose of this research is to measure the flexural strength of both traditional and newly modified concrete beams with kaolinite coal added. Two sets of eighteen samples each were ready for the data collection.
Ayampalayam Nanjappan Swaminathen, Manogaran Siva, Alphonse Belin Jude, Balasubramanian Hemalatha, Razack Nasar Ali   +4 more
doaj   +3 more sources

Reinforcement of wood with natural fibers [PDF]

, 2013
This paper describes an experimental programme which examines the reinforcement in flexure of timber beams with composite materials based on natural fibers in the form of fabrics made from hemp, flax, basalt and bamboo fibers.
A. Borri, Borri, Borri, Buell, Corradi, E. Speranzini, Fiorelli, Jankowski, Johns, Johnsson, Kromer, Lopresto, M. Corradi, Meier, Plevris, Schober, Triantafillou, Zabalza Bribián   +17 more
core   +1 more source

Hybrid Magnetoactive Soft Elastomers: Material Development Toward Application in Diaphragm Pumps

Advanced Materials Technologies, EarlyView.
Hybrid magnetoactive soft elastomeric membranes are developed by combining two different types of magnetic particles. The membranes exhibit distinct mechanical, magnetic and thermal properties owing to the unique characteristics of the two magnetic particles.
Somashree Mondal, Paweł Orkisz, Bogdan Sapiński, Ralph Spolenak, Frank Clemens   +4 more
wiley   +1 more source

Técnicas para monitorar a abertura de fissura e a posição da linha neutra em vigas de concreto reforçado com fibras de aço submetidas à flexão

Revista IBRACON de Estruturas e Materiais
Neste trabalho, três diferentes técnicas para medir e monitorar a abertura de fissura e a posição da linha neutra são investigadas, sendo elas: strain gauges, análise digital de imagens e transdutores de deslocamento.
G. P. Gava, L. R. Prudêncio Jr., T. S. Pieri, W. R. L da Silva   +3 more
doaj   +1 more source

Flexural strength of hydrogen plasma-treated polypropylene fiber-reinforced polymethyl methacrylate denture base material

The Journal of Indian Prosthodontic Society, 2018
Objectives: The present study aimed to evaluate flexural strength of hydrogen plasma-treated polypropylene fibers-reinforced polymethyl methacrylate (PMMA) polymer composite.
Merin Mathew, Kamalakanth Shenoy, K S Ravishankar   +2 more
doaj   +1 more source