A5047792604- Mechanical Behavior of Composites
- Additive Manufacturing and 3D Printing Technologies
- Natural Fiber Reinforced Composites
- Material Properties and Applications
- Acoustic Wave Phenomena Research
- Microplastics and Plastic Pollution
- Composite Structure Analysis and Optimization
- Asphalt Pavement Performance Evaluation
- Innovations in Concrete and Construction Materials
- Recycling and utilization of industrial and municipal waste in materials production
- Concrete and Cement Materials Research
- Structural Analysis of Composite Materials
- biodegradable polymer synthesis and properties
- Innovative concrete reinforcement materials
- Polymer composites and self-healing
- Advanced materials and composites
- Geotechnical Engineering and Soil Stabilization
- Fiber-reinforced polymer composites
- Nanocomposite Films for Food Packaging
- Bone Tissue Engineering Materials
- Orthopaedic implants and arthroplasty
- Engineering and Materials Science Studies
- Transition Metal Oxide Nanomaterials
- Structural Load-Bearing Analysis
- Cellular and Composite Structures
Technical University of Cluj-Napoca
2012-2024
National Institute for Research and Development in Environmental Protection
2018-2022
Babeș-Bolyai University
2017
The present study is focused on polylactic acid (PLA) blending with bio nanoadditives, such as Tonsil® (clay) and Aerosil®, to obtain nanocomposites for a new generation of food packaging. basic composition was enhanced using Sorbitan oleate (E494) Proviplast plasticizers, increasing the composite samples’ stability their mechanical strength. Four mixtures were prepared: S1 Tonsil®; S2 Aerosil®; S3 Aerosil® + Proviplast; S4 Sabosorb. They complexly characterized by FT-IR spectroscopy,...
In recent years, natural materials are becoming a valid alternative to traditional sound absorbers due reduced production costs and environmental protection. This study explores usage of sheep wool as construction material with improved absorbing properties beyond its application absorber in textile industry or using waste the raw material. The aim this was obtain sound-absorbing Seven were obtained by hot pressing (60 ÷ 80 °C 0.05 6 MPa) fibers one cold pressing. Results showed that simply...
The aim of this work is to obtain new materials with improved sound absorbing and thermal properties, using rigid or flexible polyurethane foam reinforced recycled fir sawdust from wood processing as well by optimizing their mixing ratio. In respect, we prepared characterized samples (RPUF)/flexible (FPUF) 0, 35, 40, 45, 50 wt% (FS) grains size larger than 2 mm. were evaluated cell morphology analysis, absorption, insulation performance. obtained composite containing 50% have superior...
Abstract This study focuses on the development of bioactive packaging materials by incorporating grape pomace and copper particles into polylactic acid (PLA) composites. The goal is to increase shelf life packaged foods while benefiting health consumers through use these active materials. 6 recipes composite based Proviplast 2624 plasticizer were obtained. additives added were: pomace, at 0.5%, 1% 1.5%, particles, formed using PEG 600 + CuSO₄, 2%, 5% 8%. Material characterization techniques:...
Polyamide 12 (PA 22000) is a well-known material and one of the most biocompatible materials tested used to manufacture customized medical implants by selective laser sintering technology. To optimize implants, several research activities were considered, starting with design test samples made PA 2200 (SLS) technology, different processing parameters part orientations. The obtained subjected compression tests later SEM analyses fractured zones, in which we determined microstructural...
This paper presents a refined model of the stress distribution in cylindrical assemblies. Compared to first developed by authors, present study takes into account radial assembly, σ (i) rr(r). We write all components field function axial stress, (1) zz(z), tube, and then we introduce these potential energy formulation. apply variational method deformation solve differential equation obtain minimum at same time zz(z). predicts better intensity distributions assembly.
This research aims to study the effects of sintering mechanism on crystallization kinetics when geopolymer is sintered at different temperatures: 200 °C, 400 600 800 1000 and 1200 °C for a 3 h soaking time with heating rate 5 °C/min. The made up kaolin sodium silicate as precursor an alkali activator, respectively. Characterization nepheline produced was carried out using XRF observe chemical composition ceramics. microstructures phase characterization were determined by SEM XRD, micrograph...
The growth and formation of primary intermetallics formed in Sn-3.5Ag soldered on copper organic solderability preservative (Cu-OSP) electroless nickel immersion gold (ENIG) surface finish after multiple reflows were systematically investigated. Real-time synchrotron imaging was used to investigate the microstructure, focusing situ behavior during solid–liquid–solid interactions. high-speed shear test conducted observe correlation microstructure solder joint strength. Subsequently,...
The paper presents a design and analysis methods of carbon /epoxy composite tubular parts. Testing analytical computations, based on classical laminated plate theory, the proposed manufactured material delivered engineering constants that have been used in finite element simulations two important safety tests for handlebar (bending torsion). experimental results obtained lateral bending test (critical test) are agreement with simulations.
Abstract In this article, the epoxy-based composites were developed by combining short E-glass fibers into epoxy matrix. The fiber content in composite was varied from 0.05 to 0.40 weight fraction, and variation of mechanical properties, such as tensile, flexural, impact, hardness each case, investigated. Chemical analyses constituents X-ray spectroscopy a microstructural analysis fracture area complete tests. obtained results show that although ultimate tensile strength flexural decreased...
Population expansion and the development of technology have led to an increase in construction activities. In many cases, foundation grounds do not a high enough bearing capacity are capable ensuring safe exploitation construction. A soil with poor mechanical characteristics must be improved using various methods, such as adding hydraulic binders (lime cement), natural fibres, or more recently, plastic waste materials. This work aims study behaviour materials made from polyethylene...
Polyurethane foam wastes is one of the environmental problems for which are not still efficient solutions valorization. This paper presents possibility recovering polyurethane waste by obtaining some new materials with sound absorption properties. The were ground and mixed, in proportion 0, 3, 5, 7 12 wt%, bicomponent as a binder, resulting 5 materials. sound-absorbing properties have been determined it can be observed that rigid closed pores improved adding to its structure. In addition,...