Results 81 to 90 of about 3,071 (184)

Stereomicroscope-Based in Vitro Study Evaluating the Marginal and Internal Fit of PEEK and PEKK Crowns

Journal of Pharmacy and Bioallied Sciences
PurposeThe aim of the in vitro study was to compare the internal merge and marginal perfection of polyetheretherketone (PEEK) and polyetherketoneketone (PEKK) crowns under a stereomicroscope.
Chandramohan Giri, Soundar Joephin, Shankar Kamala, Missier Mary Sheloni, Hines Allen Jim   +4 more
doaj   +1 more source

Impact of different CAD/CAM materials on internal and marginal adaptations and fracture resistance of endocrown restorations with: 3D finite element analysis

BMC Oral Health, 2023
Purpose To assess and compare the impact of various computers aided design/manufacturing (CAD/CAM) materials on internal and marginal discrepancies, fracture resistance and failure probability of Endocrown restorations with 3D Finite Element analysis ...
Shaimaa Ahmed Abo El-Farag, Fatma Abdallah Elerian, Abdallah Ahmed Elsherbiny, Mahy Hassouna Abbas   +3 more
doaj   +1 more source

Vibration Based Damage Identification in a Composite T-Beam Utilising Low Cost Integrated Actuators and Sensors [PDF]

, 2012
The development of integrated measurement systems for composite structures is\ud urged by the fact that a Structural Health Monitoring environment requires these systems to become an integral part of the structure.
Akkerman, Remko, Boller, C, de Boer, Andries, Loendersloot, Richard, Ooijevaar, T.H., Warnet, Laurent   +5 more
core   +1 more source

Determination of Crystallization Kinetics of Polyetheretherketone in Material Extrusion Process Using Numerical Simulation

Polymers for Advanced Technologies, Volume 36, Issue 12, December 2025.
ABSTRACT Despite considerable progress over the past 3 years, some issues remain in obtaining printed polyetheretherketone (PEEK) parts printed by the material extrusion process (MEX). The fast crystallization of PEEK during printing results in distortion, poor dimensional accuracy, and low inter‐filament adhesion.
Shahriar Bakrani Balani, Hossein Mokhtarian, Arthur Cantarel, France Chabert, Eric Coatanéa, Valerie Nassiet   +5 more
wiley   +1 more source

Finland: Political Developments and Data in 2024

European Journal of Political Research Political Data Yearbook, Volume 64, Issue 1, Page 183-200, December 2025.
Abstract Government‐opposition confrontation intensified in Finland in 2024, with major reforms to welfare, labour and immigration policy introduced and passed through to legislation. The first half was marked by presidential and European elections. The tight race between two internationally known candidates, Alexander Stubb from the National Coalition
EMILIA PALONEN
wiley   +1 more source

Dynamic characterisation of a damaged composite structure with stiffeners employing fibre bragg gratings [PDF]

, 2011
One of the key issues in composite structures for aircraft applications is the early detection and localisation of damage. Often service induced damage does not involve visible plastic deformation, but internal matrix related damage, like transverse ...
Akkerman, R., Boer, A. de, Grooteman, F.P., Loendersloot, R., Ooijevaar, T.H., Warnet, L.L.   +5 more
core   +1 more source

Interaction of PEKK and CF/PEKK composites with water and Skydrol

, 2023
Alléger les avions reste une problématique majeure pour l’industrie aéronautique. Le développement de composites à matrices thermoplastiques, en remplacement des thermodurcissables, permet d’obtenir des matériaux soudables et recyclables, avec une température de service supérieure.
openaire   +1 more source

Experimental verification of PEKK stiffened panel under compression

Journal of Physics: Conference Series
Abstract The paper presents the experimental strain and stress analysis of a thermoplastic composite stiffened panel subjected to compression load. The panel has five stringers with a non-symmetric design. Two panels are investigated.
Růžek, Roman, Karkulín, Adam, Mlch, Ivan, Mrňa, Tomáš, Šedek, Jakub   +4 more
openaire   +1 more source

Carbon Fiber‐Reinforced Silicon Carbide (C/C‐SiC) Fabrication Derived From Polyetherketoneketone (PEKK) as an Alternative Thermoplastic Carbon Precursor

Journal of Polymer Science, Volume 63, Issue 21, Page 4587-4599, 1 November 2025.
ABSTRACT This study shows the first successful fabrication of a carbon fiber‐reinforced silicon carbide (C/C‐SiC) via the liquid silicon infiltration process using two thermoplastic polyetherketoneketone (PEKK) powders as carbon precursors. Samples are analyzed after each processing step and compared to polyetheretherketone (PEEK)‐derived reference ...
Melissa Moos, Jalena Best, Stefan Flauder, Steve R. Nutt, Nico Langhof, Stefan Schafföner   +5 more
wiley   +1 more source

Investigation of color and physicomechanical properties of peek and pekk after storage in a different medium

Scientific Reports
The aim of this study is to assess color stability, solubility, and water sorption on polyether ether ketone (PEEK) and polyether ketone ketone (PEKK) after immersion in different storage conditions. Material and Methods Ninety disc-shaped specimens (8 × 
Nihan Kaya, Rafat Sasany, Nuran Yanıkoglu, Busra Tosun   +3 more
doaj   +1 more source