Results 81 to 90 of about 630,138 (258)

Overcoming Challenges in 3D Printing of Polyolefins and Their Composites: A Review on Strategies for Improved Printability and Performance

Polymer Engineering &Science, EarlyView.
This review integrates the molecular fundamentals, key challenges, and mitigation strategies in polyolefin 3D printing, focusing on shrinkage, warpage, and adhesion control. It highlights material design approaches using recycled polyolefins and functional fillers to improve printability, mechanical properties, and sustainability in additive ...
Malik Hassan, Philip McMorran, Marwan Eid, Julia Blair, Amar K. Mohanty, Manjusri Misra   +5 more
wiley   +1 more source

The study of a defect evolution in iron under fatigue loading in gigacyclic fatigue regime

Fracture and Structural Integrity, 2015
The work is devoted to the study of the damage accumulation in iron under gigacyclic fatigue (VHCF) regime. The study of the mechanical properties of the samples with different state of life time existing was carried out on the base of the acoustic ...
O. Plekhov, O. Naimark
doaj  

Evaluation for Gigacycle Fatigue Strength of Alloy Tool Steel

Journal of the Society of Materials Science, Japan, 2005
Ultrasonic fatigue tests were conducted with the specimens cut from LL and TT orientations of alloy tool steel. All fracture origins were defects inside the materials or very near surface. The S-N curves were monotonously decreasing slope as Nf increases.
Nobuyuki MIYAMOTO, Hiromitsu ASAI, Susumu MIYAKAWA, Yoshiaki AKINIWA, Keisuke TANAKA   +4 more
openaire   +2 more sources

Features of the fracture of the Ti–45 wt.% Nb alloy in ultrafine-grained state at gigacycle fatigue

Procedia Structural Integrity, 2023
Y. Sharkeev, A. Eroshenko, A. Mairambekova   +2 more
semanticscholar   +1 more source

Gigacycle fatigue: non-local and scaling aspects of damage localization, crack initiation and propagation

, 2016
Progress in instrumentation in fatigue studies in the range 10 7 - 10 9 cycles revealed new paradigm: crack growth is not a main portion of life and initiation mechanisms are of primary importance with internal initiation of cracking.
O. Naimark, T. Palin-Luc
semanticscholar   +1 more source

A Self‐Supervised Machine Learning Approach for the Estimation of Open‐Circuit Voltage Degradation in Photovoltaic Systems

Progress in Photovoltaics: Research and Applications, EarlyView.
This study introduces a self‐supervised machine learning approach integrating physics‐based principles to estimate open‐circuit voltage (voc$$ {v}_{oc} $$) degradation in photovoltaic systems using SCADA data. By combining clustering and regression algorithms, our method detects performance deviations without labelled datasets.
Sandra Riaño, Jose‐Domingo Santos, Miguel Esteras, Amaia Abanda, Javier Del Ser   +4 more
wiley   +1 more source

Critical Dynamics of Defects and Mechanisms of Damage-Failure Transitions in Fatigue. [PDF]

Materials (Basel), 2021
Naimark O, Oborin V, Bannikov M, Ledon D.   +3 more
europepmc   +1 more source

On the Specimen Design, Physical Properties and Geometry Effect on Heat Generation and Thermal Gradient in Ultrasonic Fatigue

Machines
Performing fatigue characterisation is often an expensive task, being both time consuming and expensive. Taking that into account, ultrasonic fatigue testing is an interesting solution, since it can be thousands of times faster than traditional ...
Felipe Klein Fiorentin, Rita Dantas, Jorge Wolfs Gil, Andrea Piga Carboni, Thiago Antonio Fiorentin, Abílio Manuel Pinho de Jesus   +5 more
doaj   +1 more source

Overall outcome, functioning, and disability in older adults 3 to 14 years after traumatic brain injury

PM&R, EarlyView.
Abstract Background Epidemiological studies show an increasing incidence of traumatic brain injury (TBI) among people aged 65 years and older. Advances in neurointensive care have improved survival after TBI. There is a need for knowledge about long‐term outcome after TBI among older survivors of TBI.
Charlotta von Seth, Anders Lewén, Marianne Lannsjö, Per Enblad, Jan Lexell   +4 more
wiley   +1 more source

Bio‐Based Polyurethanes: Mechanical Performance, Structure–Property Relationships, and Future Directions

Journal of Polymer Science, EarlyView.
This review examines bio‐based polyurethanes from renewable feedstocks, focusing on structure‐property relationships governing mechanical performance. It analyzes reinforcement strategies, benchmarks against petrochemical counterparts, and explores future directions, including non‐isocyanate routes and circular economy integration for sustainable high ...
Khaled Chawraba, Hussein Medlej, Mohamad Sakr, Akram Hijazi, Abrar Hussain   +4 more
wiley   +1 more source