Preparation and Heat‐Setting of Warp‐Knitted Silk Patches for Soft Tissue Repairs DOI Open Access
Lei Yan,

Jinfeng Wang,

Ying Mao

et al.

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 30, 2024

ABSTRACT Currently, synthetic materials for soft tissue repair are non‐biodegradable and rigid, while biodegradable natural polymer exhibit low mechanical strength. This study focuses on creating silk patches with superior properties using warp knitting. Four kinds of were made, degummed, their structural parameters evaluated. An orthogonal experiment was conducted to investigate the effects heat‐setting temperature time patches' properties. The results show that #D patch, its moderate thickness density, large concentrated pores, high strength, elongation, closely resembles tissue. After heat setting at 120°C 3 min, significantly enhanced (up 17.1%). patch exhibited a longitudinal tensile strength 276.81 N, transverse 330.73 burst 1566.5 tear 307.33 124.66 suture pullout 53.28 73.89 N. method knitting digital weaving technology allows preparation suitable repair, stability, porosity, making them ideal tendon rotator cuff repairs.

Language: Английский

Comparative Analysis of Metal–Thermoplastic Hybrid Circular Structures Under Quasi-static Lateral Loading: Implications for Crashworthiness DOI
Mahmoud M. Awd Allah,

Mahmoud F. Abd El‐Halim,

Mohamed Ibrahim Abd El Aal

et al.

Fibers and Polymers, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

Language: Английский

Citations

3
Innovative, high‐performance, and cost‐effective hybrid composite materials for crashworthiness applications DOI Creative Commons
Mahmoud M. Awd Allah,

Mahmoud F. Abd El‐Halim,

Ali Saeed Almuflih

et al.

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Abstract Integrating thermoset and thermoplastic materials in a single structure is fascinating approach, especially when looking for optimized performance characteristics. These advanced hybrid structures can achieve levels of efficiency, strength, resilience that are simply not attainable using material type. Subsequently, this work aims to examine the deformation behavior crashworthiness performances square glass fiber‐reinforced epoxy (GFRE) composite tubes filled with 3D‐printed polylactic acid (PLA). To this, three key 3D printing design parameters, is, infill pattern structure, density, layer height, were varied, each at four levels. The subjected quasi‐static lateral compression. For tested tubes, crashing load energy absorption responses recorded against displacement, failure modes analyzed. most effective parameter combination was identified complex proportional assessment (COPRAS) approach compared empty GFRE tubes. Additionally, cost ratio intended evaluate economic feasibility designed analysis concluded GFRE‐H30/0.20 configuration offers best efficiency. Highlights produced by means lay‐up wet‐wrapping hand 3D‐printing methods. developed compression loads. versus displacement plots accessible. Moreover, histories found. In addition, COPRAS method used find optimum configuration.

Language: Английский

Citations

1
Multi‐criteria decision‐making for optimizing crashworthiness of 3D‐printed PETG‐CF lightweight structures: Influence of printing parameters DOI Creative Commons
Mahmoud M. Awd Allah,

Mahmoud F. Abd El‐Halim,

Tamer A. Sebaey

et al.

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

Abstract This work investigates the effect of printing parameters on crashworthiness performance square tubes made with polyethylene terephthalate glycol reinforced carbon fiber (PETG‐CF). was accomplished by analyzing three parameters, infill pattern structure, density, and layer height, each which changed across four levels. The specimens' structural then assessed using quasi‐static axial compression testing. In addition to carefully documenting failure histories, data crash load, absorbed energy, displacement responses were methodically recorded during Several critical measures, including initial peak load (), total energy (U), mean specific (SEA), force efficiency (CFE), used evaluate crashworthiness. A complex proportional assessment (COPRAS) method, employed determine optimal configuration. results indicate that honeycomb structure achieves highest values for , U, SEA, measurements 5.57 kN, 250.54 J, 4.64 15.27 J/g, respectively. Meanwhile, Schwarz P attains maximum CFE, a value 1.585. COPRAS further indicated HC‐30‐0.20 configuration exhibited best performance. Highlights designed configurations created FDM. exposed loads. crashing absorption curves against computed. Besides, histories detected. Furthermore, method is catch structure.

Language: Английский

Citations

1
On the Influence of Different Infill Pattern Structures on the Crashworthiness Performance of 3D Printed Tubes Subjected to Lateral Loading Condition DOI
Mahmoud M. Awd Allah,

Mohamed Abbas,

Ali Saeed Almuflih

et al.

Fibers and Polymers, Journal Year: 2024, Volume and Issue: 25(11), P. 4437 - 4451

Published: Oct. 23, 2024

Language: Английский

Citations

6
Discovering the Impact of Printing Parameters on the Crashworthiness Performance of 3D-Printed Cellular Structures DOI
Mahmoud M. Awd Allah,

Mahmoud F. Abd El‐Halim,

Mohamed Abbas

et al.

Fibers and Polymers, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 5, 2024

Language: Английский

Citations

6
Energy Absorption Performance of 3D-Printed Windowed Structures Under Quasi-Static Axial Loading Condition DOI

Mahmoud F. Abd El‐Halim,

Mahmoud M. Awd Allah,

Mohamed Abbas

et al.

Fibers and Polymers, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 9, 2024

Language: Английский

Citations

4
Compressive behavior of additively manufactured lightweight structures: infill density optimization based on energy absorption diagrams DOI Creative Commons

Cristina Vălean,

Liviu Marşavina, Emanoil Linul

et al.

Journal of Materials Research and Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 1, 2024

Language: Английский

Citations

3
Mechanical characterization of 3D printed multiscale carbon nanofiller/continuous fiber reinforced polymer hybrid composites DOI Creative Commons
Jia Li, Chao Wang, Yutong Fu

et al.

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Abstract Mechanical properties of 3D printed continuous fiber reinforced polymer composites (CFRPCs) are generally lower than expected due to unavoidable voids and weak interfacial adhesion. However, previous research work has rarely been reported on introducing carbon nanofillers such as nanotubes (CNTs) graphene oxide (GO) reduce internal void defects improve adhesion CFRPCs. In this work, an innovative means CNTs GO is proposed for enhancing the mechanical hybrid Polyethylene terephthalate glycol (PETG) employed a matrix its excellent processability printing process. Continuous basalt (CBF) selected microscale filler high properties, low cost availability additive manufacturing. It shown that into PETG leads notably reduced porosity greatly improved between CBF PETG. As result, CFRPCs significantly enhanced by matrix. Finally, mechanisms analyzed The multiscale enhancement method characteristics easy implementation. This approach contributes novel idea preparing high‐performance reducing simply nanofillers. can expand material systems provide new development industrial applications. Highlights Proposed performances optimal CNT or content. Combination with enhances

Language: Английский

Citations

0
Multi‐modal assessment of recycled polyethylene terephthalate composites in additive manufacturing: The role of carbon fiber DOI Creative Commons
Ahmad Shawki Charkieh, Yifan Zhu, Sofie Huysman

et al.

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Abstract With the growing interest in sustainable manufacturing, 3D printing with recycled Polyethylene Terephthalate (rPET) offers an innovative approach to upcycling waste. This study explores potential of combining rPET milled short carbon fibers and polymer chain extenders produce high‐performance filaments through melt extrusion. Filaments containing 5% 10% fiber, without sizing, along a extender, were investigated enhance viscosity material properties rPET. Thermal analysis techniques evaluated material's thermal stability transitions, assessing degradation temperature calorimetric including glass transition melting temperatures, while measured fiber content closely matched theoretical content. Tensile testing unidirectionally printed samples showed promising mechanical properties. X‐ray micro‐computed tomography assessed length extruded filaments, comparing it target set during showing agreement. Scanning electron microscopy examined fracture side surfaces, revealing governing failure mechanisms defects, attributed filament production composition. highlights synergistic role sizing enhancing tensile modulus, improving overall consistency quality filaments. It presents groundbreaking pathway for sustainable, additive manufacturing. Highlights Investigated effect CF Melt extrusion achieved excellent alignment integrity. Additives enhanced stability, crystallization, adhesion. SEM Micro‐CT revealed improved fiber‐matrix bonding fewer defects. modulus doubled synergy extenders.

Language: Английский

Citations

0
Preparation and Heat‐Setting of Warp‐Knitted Silk Patches for Soft Tissue Repairs DOI Open Access
Lei Yan,

Jinfeng Wang,

Ying Mao

et al.

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 30, 2024

ABSTRACT Currently, synthetic materials for soft tissue repair are non‐biodegradable and rigid, while biodegradable natural polymer exhibit low mechanical strength. This study focuses on creating silk patches with superior properties using warp knitting. Four kinds of were made, degummed, their structural parameters evaluated. An orthogonal experiment was conducted to investigate the effects heat‐setting temperature time patches' properties. The results show that #D patch, its moderate thickness density, large concentrated pores, high strength, elongation, closely resembles tissue. After heat setting at 120°C 3 min, significantly enhanced (up 17.1%). patch exhibited a longitudinal tensile strength 276.81 N, transverse 330.73 burst 1566.5 tear 307.33 124.66 suture pullout 53.28 73.89 N. method knitting digital weaving technology allows preparation suitable repair, stability, porosity, making them ideal tendon rotator cuff repairs.

Language: Английский

Citations

0