Results 51 to 60 of about 2,525,414 (294)

Microvascular Damage Is Associated With Carotid Wall Structural Changes in Systemic Sclerosis: A Capillaroscopy and Ultrasound‐Based Observational Study

Arthritis Care &Research, EarlyView.
Objective Systemic sclerosis (SSc) is characterized by cardiovascular risk excess not fully explained by traditional factors. Whether the severity of microvascular damage correlates with structural subclinical atherosclerosis remains unclear. We investigated the relationship between nailfold videocapillaroscopy (NVC) abnormalities and carotid ...
Eugenio Capparelli, Luca Clerici, Francesco Lapia, Giusy C. Moltisanti, Eleonora Zaccara, Greta Pellegrino, Daniela Bompane, Francesca Capelli, Letizia Ferrami, Laura Castelnovo, Antonio Tamburello, Maria Sole Chimenti, Paola Faggioli, Antonino Mazzone   +13 more
wiley   +1 more source

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

Advanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora, Tales V. Lisbôa, Axel Spickenheuer, Rogério J. Marczak, Jakson M. Vassoler   +4 more
wiley   +1 more source

Comparative tensile strength analysis between epoxy composites reinforced with curaua fiber and glass fiber

Journal of Materials Research and Technology, 2018
Currently, one of the major concerns in our society is related to environmental issues, which has motivated researches and materials development from renewable and environmentally friendly resources.
Natalia de Oliveira Roque Maciel, Jordana Barreto Ferreira, Janaína da Silva Vieira, Carolina Gomes Dias Ribeiro, Felipe Perissé Duarte Lopes, Frederico Muylaert Margem, Sergio Neves Monteiro, Carlos Maurício Fontes Vieira, Luís Carlos da Silva   +8 more
doaj   +1 more source

Fine-grained concrete with various types of fibers

Инженерно-строительный журнал, 2020
This paper investigates the strength properties of the fine-grained concrete reinforced with the amorphous fiber based on the Fe-B-C system and obtained by the "spinning" method, and concretes reinforced with commercially available types of fibers: fiber
Yasmin Begich, Sergey Klyuev, Vladislav Jos, Artemiy Cherkashin   +3 more
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Flexural Behavior of 3D‐Printed Porous Bouligand‐Structured Polymers: Influence of Pitch Angle and Porosity

Advanced Engineering Materials, EarlyView.
This study examines how helicoidal architectures with different porosities respond to bending. Adjusting layer angle and spacing in 3D‐printed polymers reveals clear tradeoffs between stiffness, strength, and energy absorption. Experiments and simulations highlight designs that distribute stress effectively, offering pathways for optimizing lightweight
Praveenkumar Subhash Patil, Edward D. McCarthy, Parvez Alam   +2 more
wiley   +1 more source

Study on mechanical properties and strength relation between cube and cylinder specimens of steel fiber reinforced concrete

Advances in Mechanical Engineering, 2019
An experimental study was performed on the splitting tensile strength of steel fiber reinforced concrete using cube and cylinder specimens. Effects of volume fraction, aspect ratio, geometry, and tensile strength of steel fiber on the splitting tensile ...
Haitang Zhu, Chuanchuan Li, Danying Gao, Lin Yang, Shengzhao Cheng   +4 more
doaj   +1 more source

Mechanical Properties of Fiber-Reinforced Soil under Triaxial Compression and Parameter Determination Based on the Duncan-Chang Model

Applied Sciences, 2020
To study the mechanical properties of Y-shaped polypropylene fiber-reinforced subgrade fill, the strength characteristics of fiber-reinforced soil with different fiber contents, fiber lengths, and confining pressures were investigated through triaxial ...
Yingying Zhao, Xianzhang Ling, Weigong Gong, Peng Li, Guoyu Li, Lina Wang   +5 more
doaj   +1 more source

Effect of fiber length on mechanical properties of wood composite plastic (Polypropylene) [PDF]

تحقیقات علوم چوب و کاغذ ایران, 2010
The objective of adding reinforcing fillers, such as natural fibers to plastics is to increase the strength compared with neat plastic and wood. In this research the effect of wood pulp fiber length (short, medium and long), aspect ratio and fiber ...
Farshid Basiji, Vahid reza Safdari, Ahmad Jahan latibari, Amir Nourbakhsh   +3 more
doaj   +1 more source

Strength scaling in fiber composites [PDF]

32nd Structures, Structural Dynamics, and Materials Conference, 1991
A research program was initiated to study and isolate the factors responsible for scale effects in the tensile strength of graphite/epoxy composite laminates. Four layups were chosen with appropriate stacking sequences so as to highlight individual and interacting failure modes. Four scale sizes were selected for investigation including full scale size,
Sortiris Kellas, John Morton
openaire   +1 more source