Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Bacteria-based self-healing concrete has emerged as a promising solution for enhancing structural durability by autonomously repairing cracks. However, the underlying transport mechanisms of healing agents and the efficiency of mineral precipitation remain inadequately modelled. This study presents a finite element modelling (FEM) approach to simulate the diffusion and reaction kinetics of self-healing bacterial agents in concrete microstructures. X-ray micro-computed tomography (Micro-CT) finite element meshes were utilized to accurately represent crack and pore geometries, while the diffusion-reaction equation governing calcium carbonate (CaCO) precipitation was numerically solved using FEniCS. Key input parameters, including diffusion coefficients, precipitation rates, and healing efficiencies, were extracted from literature to ensure model validation. Simulations reveal that healing agent concentration follows a nonlinear diffusion pattern, with efficiency influenced by crack geometry and bacterial metabolic activity. Heatmaps and contour plots highlight healing agent dispersion, while time-dependent analysis indicates a 65.5% crack closure efficiency under optimal bacterial conditions. The proposed model effectively replicates experimental trends, demonstrating its applicability for predicting healing performance in realistic structural conditions. This study provides a computational framework that can be extended to optimize bacteria encapsulation strategies, healing kinetics, and long-term durability assessments in self-healing concrete.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12056202 | PMC |
| http://dx.doi.org/10.1038/s41598-025-99844-6 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A practical approach to determining screw preload in dental implant systems.
J Prosthet Dent
September 2025
Professor, Washington Dental Service Endowed Chair in Dentistry, and Chair, Department of Restorative Dentistry, School of Dentistry, University of Washington, Seattle, Wash.
A practical and novel technique used both in testing and in practice when tightening dental implant screw systems is described for determining the preload implant screw systems, which differs from traditional tightening procedures that are based solely on the application of a predetermined manufacturer specified torque value. Preload is the critical quantity for a reliable joint: about 90% of tightening torque goes into overcoming friction and the remaining amount, approximately 10%, goes into preload. Because of the heavy dependence of torque on friction, the actual preload achieved is subject to large variability of up ±35%, depending on surface conditions (dry, wet, or contaminated).
View Article and Find Full Text PDFBiomechanical impact of sagittal curvature radius in glenoid fossa on TMJ prosthesis performance: A finite element study of custom designs.
J Prosthet Dent
September 2025
Full Professor, School of Mechanical Engineering, Universidad Industrial de Santander, Bucaramanga, Colombia. Electronic address:
Statement Of Problem: Although custom temporomandibular joint (TMJ) prostheses manufactured via computer-aided design and manufacturing (CAD-CAM) and produced through 3-dimensional (3D) printing or computer numerical control (CNC) allow for sagittal curvature adjustments in the glenoid fossa, their design remains unregulated by the Food and Drug Administration. Consequently, the geometry is determined largely by the engineer's discretion, with limited biomechanical evidence to guide these decisions. The lack of validation regarding how sagittal curvature influences joint stress distribution under various anatomical and functional conditions represents a gap in current knowledge that warrants investigation.
View Article and Find Full Text PDFFinite Element Analysis of Mandibular Distraction Osteogenesis With a New Partially Bioabsorbable Distractor.
J Craniofac Surg
September 2025
Department of Craniomaxillofacial Surgery, Peking Union Medical College, Chinese Academy of Medical Sciences, Plastic Surgery Hospital, Beijing, China.
Objective: We designed a new distractor pairing a bioabsorbable upper fixing plate fixed by bioabsorbable screws with a traditional titanium distractor to simplify the second surgery removing the distractor after mandibular distraction osteogenesis. The present study aims to evaluate its biomechanical properties using finite element method.
Materials And Methods: Ten computer-aided designed models simulating mandibles of 5 patients under 2 working conditions, the instance of distraction and mastication, were produced.
Should We Always Use a Metaphyseal Cone in Conjunction With Tibial Augments for Uncontained Defects? A Finite-element Biomechanical Analysis.
Clin Orthop Relat Res
August 2025
Complex Joint Reconstruction Center, Hospital for Special Surgery, New York, NY, USA.
Background: Choosing the appropriate implants for reconstruction in revision TKA is essential for long-term fixation. While cones and augments are routinely utilized to address tibial defects, the effect of augment location and size on the biomechanical stability of revision TKA constructs and the indications for the use of metaphyseal cones are not known.
Questions/purposes: Is the risk of cement-implant debonding of revision TKA constructs impacted by the thickness and location (medial versus bicompartmental) of tibial augments and the presence of metaphyseal cones during (1) a demanding daily activity like stair ascent and (2) torsional loads?
Methods: Under institutional review board approval, we developed patient-specific finite-element models of revision TKA from four patients (three males and one female, ages 50 to 80 years, BMI 27 to 37 kg/m2) who underwent two-stage revision and had a CT scan with no metal artifact after first-stage implant removal.
End-to-end inverse design for programmable acoustic tweezers with simultaneous force and torque control by metasurfaces.
Sci Adv
September 2025
Department of Mechanics, School of Mechanical Engineering, Tianjin University, Tianjin 300350, China.
Acoustic tweezers leverage acoustic radiation forces for noncontact manipulation. One of the core bottlenecks in multidimensional manipulation is the lack of a systematic design methodology, which prevents the generation of an acoustic field that simultaneously meets the collaborative control requirements of multi-degree-of-freedom forces and torques, making it difficult to achieve precise control under conditions of stable suspension, high-frequency rotation, and complex spatial constraints. To address this challenge, we develop an end-to-end inverse design methodology for acoustic tweezers based on coding metasurfaces, establishing a dual-objective, dual-scale optimization paradigm.
View Article and Find Full Text PDF