Article
Engineering, Biomedical
Othniel J. Aryeetey, Martin Frank, Andrea Lorenz, Sarah-Jane Estermann, Andreas G. Reisinger, Dieter H. Pahr
Summary: This study proposes a reduced-parameter AQLV model for accurately characterising the properties of soft biological tissues at finite strain ranges. By reducing the number of model layers and experimental steps, the number of model parameters can be significantly reduced, resulting in a decrease in experimental time.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Computer Science, Interdisciplinary Applications
Husnu Dal, Alp Kagan Acan, Ciara Durcan, Mokarram Hossain
Summary: In this work, twelve invariant and dispersion-type anisotropic hyperelastic constitutive models for soft biological tissues are reviewed based on their fitting performance to various experimental data. A hybrid multi-objective optimization procedure and a genetic algorithm are used to generate initial guesses followed by a gradient-based search algorithm. The models are then fit to uniaxial and biaxial tension experiments conducted on tissues with different histology. The investigation reveals superior fitting performance of dispersion-type anisotropic constitutive formulations over invariant formulations.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2023)
Article
Biophysics
Hamed Helisaz, Mattia Bacca, Mu Chiao
Summary: This study introduces a novel method based on QLV theory to describe time-dependent behavior of soft materials, characterizing elastic and viscous properties separately for accurate material characterization. The model shows potential for diagnosis in prostate cancer but requires further clinical studies.
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2021)
Article
Materials Science, Multidisciplinary
Jian Li, Hannah Varner, Tal Cohen
Summary: The necking instability is a precursor to tensile failure and rupture of materials. It can exhibit periodic necking and fragmentation when confined to a substrate or embedded in a matrix. Necking in hyperelastic materials is not well understood, but there has been a renewed interest in its role for the advancement of fabrication processes and to explain fragmentation phenomena.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Engineering, Electrical & Electronic
Anoush Sepehri, Hamed Helisaz, Mu Chiao
Summary: The mechanical properties of tissues play a significant role in the progression of different types of cancers. Therefore, it is crucial to have a reliable and robust method for characterizing the properties of soft materials, which might aid in early cancer diagnosis. This study introduces a tactile sensor utilizing fiber Bragg grating technology to assess the elastic and viscous properties of soft materials during tissue palpation. The results demonstrate that the sensor, along with the proposed quasi-linear viscoelastic model, can effectively determine the elastic and viscous properties, making it a potential tool for distinguishing between cancerous and healthy tissue in the future.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Urology & Nephrology
Jianli Wang, Jiawei Chen, Xincheng Gao, Bing Li
Summary: This study aims to evaluate the viscoelastic properties of fresh porcine ureter and demonstrates the applicability of the QLV theory in describing its stress relaxation function. The eight constants of ureteral tissue are determined through data fitting with the model.
INTERNATIONAL UROLOGY AND NEPHROLOGY
(2022)
Article
Robotics
Emanuele Vignali, Emanuele Gasparotti, Katia Capellini, Benigno Marco Fanni, Luigi Landini, Vincenzo Positano, Simona Celi
Summary: Cardiovascular diseases are the leading cause of death in western countries, and robotic surgery is increasingly important in the field. A deeper understanding of blood vessel material properties is necessary for the advancement of soft robotics applications. Testing different models and implementing weighting procedures have significant impacts on model performance.
INTERNATIONAL JOURNAL OF ROBOTICS RESEARCH
(2021)
Article
Engineering, Geological
Wenbo Liu, Hui Zhou, Shuguang Zhang, Chengwei Zhao
Summary: The MTS815.02 rock test system is used to conduct triaxial compression creep experiments on sandstone, revealing the rheological properties of deep roadway rocks. The improved creep model comprehensively considers instantaneous elastic, non-linear viscoelastic, and viscoplastic strains, and shows high consistency with experimental data. The validity and feasibility of the creep model are verified by comparing the experimental and theoretical curves.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Wenqiang Liu, Michael Nguyen-Truong, Kristen LeBar, Kevin M. Labus, Elisabeth Gray, Matt Ahern, Sunder Neelakantan, Reza Avazmohammadi, Kirk C. McGilvray, Christian M. Puttlitz, Zhijie Wang
Summary: This study investigated the biomechanical differences between the left ventricle (LV) and right ventricle (RV) in large animal species. The results showed that the LV is stiffer in the longitudinal direction, while the RV is stiffer in the circumferential direction. These findings provide valuable insights for cardiac tissue engineering and regenerative studies, as well as for non-invasive estimation of myocardial properties.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Review
Engineering, Mechanical
Zhihua Liu, Zhirong Liao, Dong Wang, Chengyong Wang, Chengli Song, Haonan Li, Yao Liu
Summary: Research on cutting soft biological tissues is important for improving surgical instrument performance and reducing tissue damage. However, there is a lack of comprehensive review on recent advances in soft tissue manipulation technologies.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Changkye Lee, Sundararajan Natarajan
Summary: This paper proposes an adaptive framework based on the edge-based strain smoothing approach with polygonal meshes for largely deformable quasi-incompressible hyperelasticity. The framework utilizes quadtree decomposition for spatial discretization and strain smoothing technique for computing the bilinear/linear form. Numerical study demonstrates the accuracy and robustness of the proposed framework with fewer degrees of freedom compared to uniform refinement.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Biophysics
Pan Ren, Xing Deng, KeZhou Li, GuiHao Li, Wei Li
Summary: The study aimed to investigate the three-dimensional passive biomechanical properties of esophageal tissues using a new SEF combining polynomial and exponential functions. Experimental tests were conducted to assess the suitability of different SEFs for describing the behavior of different layers of the esophagus, leading to the identification of optimal constitutive parameters for each layer.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2021)
Article
Computer Science, Interdisciplinary Applications
Yuki Yamakawa
Summary: The objective of this article is to extend existing hyperelastic constitutive models for geomaterials to include finite strains and examine the model responses. The study reveals significant differences in model responses depending on the types of models, with some models showing unreasonable stress decrease during triaxial compression.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Acoustics
Soumya Goswami, Rifat Ahmed, Fan Feng, Siladitya Khan, Marvin M. Doyley, Stephen A. McAleavey
Summary: Imaging tissue mechanical properties has shown promise in noninvasive assessment of various diseases. This work presents a method to map the frequency-dependent nonlinear parameters of soft tissues on a local scale, which offers a more complete characterization of tissue biomechanics. Initial assessments using simulations and experiments validate the accuracy of this approach, with improved contrast observed at higher frequencies.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Computer Science, Information Systems
Kevin Wandke, Y. Z
Summary: Using the open-source MOOSE environment, the study accurately modeled the behavior of neo-Hookean hyperelastic materials under large deformations, showing good agreement with theoretical results. Additionally, the method was successfully applied to predict the response of a real soft pneumatic actuator. The open-source nature of the simulation environment allows direct control over simulation parameters, providing users with flexibility in adjusting accuracy, convergence, and speed of simulations.
Article
Materials Science, Composites
Michael J. A. Smith, Zeshan Yousaf, Prasad Potluri, William J. Parnell
Summary: The mechanical response and thermal characteristics of HTM syntactic foams were studied, revealing their highly tunable nature and high compressibility at large strains with a high threshold for plastic deformation. The non-standard transverse strain behavior at high filling fractions was captured by Ogden-type strain energy models.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Eleanor R. Russell, Raphael C. Assier, William J. Parnell
Summary: We designed a heat spreader with a special shape to achieve a spatially uniform thermal field. Transformation-based techniques were used to determine the required thermal conductivity, and the materials were approximated by assembling layers or dividing them into components. This design opens up possibilities for manipulating heat flow and solving heat transfer problems in the future.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Engineering, Multidisciplinary
Zeshan Yousaf, Neil F. Morrison, William J. Parnell
Summary: All-polymer syntactic foams were studied under large strain cyclic and monotonic tensile loading to reveal their tensile stress-strain behavior, recoverability, tensile strength, and elongation at break. The study found that higher volume fractions of hollow thermoplastic microspheres increase the stiffness of the material and lead to damage at lower levels of strain.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Mechanics
Riccardo De Pascalis
Summary: This study investigates the diffusion-induced stress on a solid sphere undergoing radial diffusion charging, considering both linear and nonlinear elasticity theories. The equations are solved using a finite difference numerical scheme. Furthermore, the equations for functionally graded materials are derived, and it is shown how the elastic coefficient can be used to control stress evolution.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2022)
Article
Mechanics
Harold Berjamin, Riccardo De Pascalis
Summary: This study presents a framework for analyzing the dynamic response of nonlinear viscoelastic solids and provides specific examples of practical applications. The results show that viscoelastic dissipation has an impact on the location of the band gap in phononic crystals.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Multidisciplinary Sciences
Philip A. Cotterill, David Nigro, William J. Parnell
Summary: The giant monopole resonance is a well-known phenomenon that has been widely used in acoustic material design. This resonance, caused by voids in composite materials, can be modified by their interaction. By changing the number and configuration of voids, the directionality, scattering amplitude, and resonant frequency of the material can be tailored and tuned.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Multidisciplinary Sciences
Michael J. A. Smith, I. David Abrahams
Summary: We propose a novel multipole formulation for calculating the band structures of 2D arrays of cylindrical Helmholtz resonators and apply it to compute the first band gap of both thin- and thick-walled resonators. Compared to classical methods, our formulation has a wider applicability in terms of frequency and Bloch vector range, accurately describing various features of the first band.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Multidisciplinary Sciences
Michael J. A. Smith, I. David Abrahams
Summary: This study presents a solution method that combines matched asymptotic expansions with the method of multipole expansions to determine the band structure of cylindrical Helmholtz resonator arrays in two dimensions. The study finds that the existing treatment in the extremely thick-walled limit returns spurious spectral behavior, and therefore proposes a regularized system and a compact asymptotic description to overcome this issue. The matched-asymptotic system is shown to be able to accurately recover the first few bands over the entire Brillouin zone.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Physics, Applied
Marie Touboul, Philip A. Cotterill, David Nigro, William J. Parnell
Summary: This study investigates the properties of resonance clusters, where the interaction between two resonators significantly enhances the amplitude of the resonance itself. Additionally, the incidence angle also has a significant impact on the enhancement and far-field scattered response.
APPLIED PHYSICS LETTERS
(2022)
Article
Multidisciplinary Sciences
M. J. A. Smith, P. A. Cotterill, D. Nigro, W. J. Parnell, I. D. Abrahams
Summary: In this study, a solution procedure for acoustic plane wave scattering by a single Helmholtz resonator in two dimensions is presented using a combination of multipole methods and matched asymptotic expansions. The study examines scattering effects at different resonator thicknesses and observes strong enhancement at the Helmholtz resonance frequencies.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Multidisciplinary Sciences
Erik Garcia Neefjes, David Nigro, Artur L. Gower, Raphael C. Assier, Valerie J. Pinfield, William J. Parnell
Summary: This paper presents a unified framework for studying wave propagation in homogeneous linear thermo-visco-elastic continua. It provides asymptotic approximations to the wavenumbers of the modes and discusses how simpler acoustic/elastic dissipative theories can be derived from this framework. The framework allows for modeling interfaces involving fluids and solids and quantifying the influence of thermal or viscous losses.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Mechanics
Gareth Wyn Jones, Michael J. A. Smith, Maria Thorpe, I. David Abrahams, William J. Parnell
Summary: The passage discusses the study of the buckling of a thin spherical shell embedded in a soft medium, focusing on the compression of syntactic foam composites. The critical buckling pressures are determined in practical scenarios of hydrostatic and uniaxial compressive loading states. Different results are obtained when considering the thin-stiff shell limit compared to the standard thin-shell limit, where the shell and matrix have stiffnesses of the same order.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Acoustics
Cheuk-Him Yeung, William J. Parnell, Tom Shearer
Summary: An active cloaking strategy for the scalar Helmholtz equation in three dimensions is developed using active sources placed at the vertices of Platonic solids. This strategy creates a silent zone inside the Platonic solid, allowing only the incident field to remain in a defined region outside this zone. The distribution of sources ensures efficient implementation of the cloaking strategy by calculating amplitudes using a rotation matrix.
JASA EXPRESS LETTERS
(2023)
Article
Multidisciplinary Sciences
James Haughton, Simon L. Cotter, William J. Parnell, Tom Shearer
Summary: Microstructural models of soft-tissue deformation play a crucial role in artificial tissue design and surgical planning. By employing a Bayesian approach and an adaptive Markov chain Monte Carlo algorithm, we are able to quantify the uncertainty in parameter values for tendon samples and provide a prototype for quantifying parameter uncertainty in other soft tissues.
JOURNAL OF THE ROYAL SOCIETY INTERFACE
(2022)
