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Accurate identification of local changes in the biomechanical properties of the normal and degenerative meniscus is critical to better understand knee joint osteoarthritis onset and progression. Ex-vivo material characterization is typically ...

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• In-situ parameter identification using MRI and inverse finite element analysis.
• Model verification confirmed reliability and robustness of identified parameters.
• Knee joint degeneration affects the compression-related meniscus ...

The human aorta undergoes complex morphologic changes that mirror the evolution of disease. Finite element analysis (FEA) enables the prediction of aortic pathologic states, but the absence of a biomechanical understanding hinders the ...

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• Spatial gradients of local growth drive morphologic shape changes in aortic disease.
• Image registration, finite element modeling, and geometric analysis are integrated.
• Our method quantitatively links past geometric change to ...

The engineering design of metamaterials with selected acoustic properties necessitates adequate prediction of the elastic wave propagation across various domains and specific frequency ranges. This study proposes a systematic approach centered on ...

• The approach combines FE and Green’s function analysis to predict wave propagation.
• Homogenization uses 3D assumption-free numerical Green functions over complex RVEs.
• Key dissipation and discretization parameters for accuracy are ...

Pseudo-unidirectional fiber networks are used in a variety of applications, such as woven fabrics and needling. A method for generating pseudo-unidirectional fiber networks by extruding linear portions of fibers is described here, and consists of ...

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• A fast algorithm generating pseudo-1D fiber networks has been developed.
• Two geometric criteria characterizing fiber entanglement have been proposed.
• A Finite element model of needle-punching without compaction has been developed.

The most serious complication of elbow stiffness is iatrogenic radial nerve injury. A hinged external fixator combined with open arthrolysis is a common clinical operation. The purpose of this study was to compare the mechanical characteristics of ...

This work proposes an optimisation platform, consisting of a recently proposed parametrisation and a modified gradient-based optimiser to optimise curved beams. This parametrisation technique defines a curve by a series of alternative straight ...

• A new parametrisation method is presented to describe curved beams with a small set of design variables.
• A gradient-based optimisation platform is developed which can easily incorporate geometric and manufacturing constraints.
• ...

This research paper describes modifying a conventional bicycle into an electric bike by retrofitting it with a single-phase boost power factor correction (PFC) rectifier for low power battery chargers. The proposed work was designed and developed ...

• TAVI Complications: Issues include valve migration, paravalvular leakage, and more.
• Computational Models: Used for predicting post-TAVI biomechanics and hemodynamics.
• Material Properties: Realistic modeling of aortic tissues and ...

Transcatheter aortic valve implantation (TAVI) has significantly transformed the management of aortic valve (AV) diseases, presenting a minimally invasive option compared to traditional surgical valve replacement. ...

• The innovative HFT approach offers a practical solution to avoid expensive large fire tests.
• Achieves quick convergence for accurate structural analysis in HFT.
• TCP/IP platform ensures continuous data exchange between physical and ...

In large-scale structural fire resistance tests, the interaction between the individual elements and the surrounding structure causes discrepancies in behaviour compared to single-element fire tests. Large-scale tests of real structures are ...

High-energy particles, including photons (x-ray, γ-ray, bremsstrahlung), electrons, and protons, possess the capability to penetrate materials and deposit energy within them. The degree of absorption depends on both the energy and type of ...

• The structural integrity of beam intercepting devices subjected to high-energy free electron lasers is investigated.
• The underlying physics, and potential failure modes of beam intercepting devices are reviewed.
• FEA verification ...

Single-leg landing (SL) is an essential technique in sports such as basketball, soccer, and volleyball, which is often associated with a high risk of knee-related injury. The ankle motion pattern plays a crucial role in absorbing the ...

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• The proposed knee musculoskeletal model can more realistically revert and simulate the ACL injury mechanics.
• A larger ankle plantarflexion during landing can reduce the knee impact load.
• A larger ankle plantarflexion can reduce the ...

Degenerative meniscus tissue has been associated with a lower elastic modulus and can lead to the development of arthrosis. Safe intraoperative measurement of in vivo elastic modulus of the human meniscus could ...

• Estimation of elastic moduli during arthroscopy using an adaptive observer method.
• Arthroscopic elastic moduli were validated against moduli based on indentation test.
• Meniscus shows subject specificity, as well as anatomical and ...

Composite materials are essential for many advanced engineering applications, but numerical quantification of strength variability can be computationally expensive. This paper proposes a novel methodology that drastically reduces the number of ...

• Measurement-based fibre misalignment, volume fraction and fibre strength variability.
• Vine copula replaces stochastic finite element strength homogenisation.
• Spatial material variability reduces UD coupon tensile strength by 3.8%.

Topology optimization is an engineering design methodology that optimizes designs by manipulating material distribution. Level-set topology optimization (LSTO), a boundary-based method, has gained popularity for its crisp description of the design ...

The design of a helicopter is an intricate and challenging process. Decisions made during the preliminary design phase can significantly impact subsequent design stages, making it crucial to base these decisions on a solid foundation. A range of ...

Positive airway pressure (PAP) therapy refers to sleep disordered breathing treatment that uses a stream of compressed air to support the airway during sleep. Even though the use of PAP therapy has been shown to be effective in improving the ...

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• Simulating the virtual mask-face fitting with FEM.
• Proposing quantitative measures on air leakage and comfort for the mask.
• Optimizing the geometry of the mask cushion to minimize our measures on leakage and comfort.
• Ensuring ...

Alterations in occlusal features may have significant consequences, ranging from dental aesthetics to health issues. Temporomandibular joint disorders (TMDs) are often associated with joint overload, and the correlation between occlusal features ...

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• Reveals an important potential link between occlusal contact and temporomandibular joint loading.
• Highlights the dominance of anterior-posterior occlusal contact changes over medial-lateral variations in TMJ overloading.
• Creates a ...

High-performance polymers are used in different fixed prosthesis treatments due to their many advantages such as biocompatibility, shock absorption ability, high fracture resistance. The effects of marginal design on the forces on high-...

• A tomography of an utterly edentulous adult patient was taken to create the geometric model of the maxilla.
• During modeling, the alveolar crest width was 6 mm, and the height was 25 mm. After decomposition, a 3D model was obtained ...

Polymeric materials find extensive applications across various engineering sectors. Among these, a particularly critical application for these materials is in the field of roller coasters. The wheels are typically made with an aluminum hub and a ...

• Development of a FE method for temperature evaluation of polyurethane coated wheels.
• The proposed FE method speeds up temperature calculation compared to standard methods.
• The proposed FE method helps to choose the wheel that ...

Early studies highlighted the fact that moving loads on beams may induce significantly higher dynamic deflections and stresses than those observed in the quasi-static case. Since then, the dynamics of beams under moving loads has been an active ...

• A new complementary-based variational statement for the analysis of damped beams under moving loads is proposed.
• A new simple and effective finite element formulation (FEF) is derived from the proposed variational statement.
• The ...