Article
Materials Science, Multidisciplinary
Christopher Miller, T. Christian Gasser
Summary: Understanding the damage and failure of load-carrying soft biological tissue is crucial for effective treatment of injuries and diseases. This study presents an extended microstructural continuum model that incorporates proteoglycan mediated collagen fibril sliding and interfibrillar failure mechanism to capture the non-linear time dependent properties of collagenous tissue. The study also demonstrates a bottom-up approach by utilizing the microstructural model to represent the modes of fracture and derive a surface-based characterization of failure.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Chemistry, Physical
Jinlong Su, Xiankun Ji, Haiming Xie, Jie Tang, Fulin Jiang, Dingfa Fu, Jie Teng, Hui Zhang
Summary: The flow behaviors and microstructural evolutions during multi-stage hot deformation of a near-alpha Ti-5Al-2.5Sn alloy were studied. It was observed that the flow stress and restoration fraction in the alpha + beta phase region were lower in the non-isothermal multi-stage deformation compared to isothermal multi-stage deformation. Clear transitions were observed between different phase regions during the non-isothermal multi-stage deformation. Additionally, a dynamic phase transformation and the formation of FCC-Ti precipitations were observed during deformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jason Mulderrig, Bin Li, Nikolaos Bouklas
Summary: The study focuses on the degradation of elastomer networks under loading due to polydispersity, developing constitutive models to simulate chain rupture and damage effects at the microscale. Numerical simulations of uniaxial tension tests were conducted to investigate stress-stretch response and concurrent damage evolution. These simulations also examined the impact of microsphere quadrature order and chain damage evolution on stability, visually displaying chain deformation and damage behavior through stereographic projections.
MECHANICS OF MATERIALS
(2021)
Article
Engineering, Biomedical
Alessandro Giudici, Ye Li, Yasmin, Sarah Cleary, Kathleen Connolly, Carmel McEniery, Ian B. Wilkinson, Ashraf W. Khir
Summary: Age-related remodelling of the arterial wall shifts the load bearing from the compliant elastin network to the stiffer collagen fibres. This study found that the tangential elastic modulus increased with age, while the elastin stiffness-like parameter decreased between 30 and 40 years. Changes in collagen parameters were observed later at age > 60 years.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Engineering, Biomedical
Alessandro Giudici, Ye Li, Yasmin, Sarah Cleary, Kathleen Connolly, Carmel McEniery, Ian B. Wilkinson, Ashraf W. Khir
Summary: The study found that the human thoracic aorta stiffens during its life-course, which is related to the degeneration time-courses of elastin and collagen.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Engineering, Biomedical
Eoghan M. Cunnane, Niall F. Davis, Connor Cunnane, Katherine L. Lorentz, Alan J. Ryan, Jochen Hess, Justin S. Weinbaum, Michael T. Walsh, Fergal J. O'Brien, David A. Vorp
Summary: This study characterises the relationship between urethral tissue mechanics, composition, and structure, leading to the development of a biomimetic urethral scaffold that more accurately mimics native tissue properties compared to existing scaffolds. The scaffold, fabricated from collagen and elastin, shows promising results in terms of cell infiltration and mechanical properties. The findings pave the way for the development of biomimetic urethral grafts for potential in vivo applications.
Article
Biotechnology & Applied Microbiology
Rory Gibney, Eleonora Ferraris
Summary: The study utilized aerosol jet printing to process collagen type I and II into dense constructs with suitable mechanical properties for replicating dense collagenous connective tissues. Collagen type II exhibited lower viscosity compared to type I, and both types experienced a drop in viscosity due to aerosol jet printing.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Christopher Miller, T. Christian Gasser
Summary: This passage introduces a versatile constitutive model for load-carrying soft biological tissues, incorporating microstructural deformation mechanisms and predicting complex non-linear viscoelastic behavior. It presents a multiscale framework based on a novel description of collagen, introducing proteoglycan mediated fibrillar sliding and efficient stress determination. Test cases, including patient-specific geometries, confirm the effectiveness of the model in explaining qualitative properties observed in macroscopic experimental studies of tendon and vascular tissues.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Biophysics
Shuolun Wang, Hamed Hatami-Marbini
Summary: This study creates a generalized structure tensor (GST) model to investigate the mechanical influence of collagen fibril through-thickness distribution in the cornea. Numerical simulations of corneal mechanical response in inflation experiments are used to assess the efficacy of the proposed model, along with a parametric study to investigate the influence of model parameters on numerical predictions. Finally, a brief comparison between the new constitutive model and a recent angular integration (AI) model from the literature is provided.
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2021)
Article
Chemistry, Physical
Yu-Qiang Jiang, Y. C. Lin, Guan-Qiang Wang, Guo-Dong Pang, Ming-Song Chen, Zhi-Chao Huang
Summary: The microstructure evolution of a Ti-55511 alloy deformed at high temperatures and wide strain rate range was studied, and a unified constitutive equation was established to describe the evolution of flow stress, grain size, and dynamic recrystallization fraction. Experimental results showed different structures were formed within the alloy under different deformation conditions, with DRX fraction and sub-grain size changing with increasing deformation temperature and strain rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Shi Dai, Zi Chen Deng, Ya Jun Yu, Kai Yang Zhu
Summary: The study investigates the flow behavior and microstructure evolution of AlSi10Mg through hot deformation during additive manufacturing. It is found that at different temperatures, the microstructure changes significantly, with cellular structure and melt pool boundary disappearing as temperature increases. Additionally, at 400℃, a homogenization process leads to precipitation forming a dispersed phase, resulting in weak hardening of the material. The constitutive model shows good agreement with experimental results at high temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Peihao Ye, Xuchen Jin, Wenbin Fang, Xuewen Li, Hao Wu, Guohua Fan
Summary: The study investigated the hot deformation behavior and microstructure evolution of a PM TiAl alloy reinforced with Ti2AlC particles. Results showed that Ti2AlC particles effectively hindered dislocation pile-up, strengthened the alloy, and induced recrystallization nucleation. Additionally, the Ti2AlC particles significantly restricted grain growth, with dynamic recrystallization dominating the softening mechanism.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Wei-Hsun Liao, Che-Wei Tsai, Yu-Chih Tzeng, Woei-Ren Wang, Chi-San Chen, Jien-Wei Yeh
Summary: The hot deformation behavior of equimolar CoCrFeNi HEA was investigated through hot compression, and processing maps were constructed using a dynamic materials model. The experimental results were consistent with the contour map, indicating a well-deformed region at 1223 K and 10-3 s-1 with a power dissipation parameter of 0.3.
MATERIALS CHARACTERIZATION
(2023)
Article
Engineering, Mechanical
Yazhuo Liu, Xianke Feng, Wei Hong
Summary: Viscoelasticity is a universal property in most soft solids and is often considered a major mechanism of toughening in polymeric materials. However, this study shows that there is a significant amount of energy dissipation due to non-affine deformation near the crack tip, which is attributed to the rearrangement and mutual sliding of neighboring chains caused by the rupture of a polymer chain. Various methods of reducing inter-chain friction can mitigate this non-affine dissipation, while making an elastomer more elastic can enhance it. The identification of this non-affine dissipation mechanism has implications for the development of new soft materials with both excellent elasticity and fracture toughness.
EXTREME MECHANICS LETTERS
(2023)
Article
Engineering, Biomedical
Sergio A. Pineda-Castillo, Santiago Aparicio-Ruiz, Madison M. Burns, Devin W. Laurence, Elizabeth Bradshaw, Tingting Gu, Gerhard A. Holzapfel, Chung-Hao Lee
Summary: Coronary atherosclerosis is a leading cause of death worldwide. This study characterized the microstructural and mechanical properties of the porcine left anterior descending artery (LADA), and found regional differences in both properties. The study also observed load-dependent microstructural variations and highly aligned fibers in the distal region of the artery. These findings offer new insights into coronary mechanics and can aid in the development of tissue-engineered vascular grafts.
ACTA BIOMATERIALIA
(2022)
Article
Cardiac & Cardiovascular Systems
Yunlong Huo, Yana Cheng, Xuefeng Zhao, Xiao Lu, Ghassan S. Kassab
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY
(2012)
Article
Engineering, Biomedical
Huan Chen, Tong Luo, Xuefeng Zhao, Xiao Lu, Yunlong Huo, Ghassan S. Kassab
Article
Biophysics
Xuefeng Zhao, Madhavan L. Raghavan, Jia Lu
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2011)
Article
Biophysics
Huan Chen, Yi Liu, Mikhail N. Slipchenko, Xuefeng Zhao, Ji-Xin Cheng, Ghassan S. Kassab
BIOPHYSICAL JOURNAL
(2011)
Article
Materials Science, Multidisciplinary
X. Zhao, Z. C. Berwick, J. F. Krieger, H. Chen, S. Chambers, G. S. Kassab
EXPERIMENTAL MECHANICS
(2014)
Article
Mechanics
Jia Lu, Xuefeng Zhao
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2009)
Article
Mechanics
Xuefeng Zhao, Xiaolin Chen, Jia Lu
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2009)
Article
Physiology
Yunlong Huo, Xuefeng Zhao, Yana Cheng, Xiao Lu, Ghassan S. Kassab
JOURNAL OF APPLIED PHYSIOLOGY
(2013)
Article
Physiology
Huan Chen, Mikhail N. Slipchenko, Yi Liu, Xuefeng Zhao, Ji-Xin Cheng, Yoram Lanir, Ghassan S. Kassab
JOURNAL OF APPLIED PHYSIOLOGY
(2013)
Article
Biophysics
Xuefeng Zhao, Mike Burger, Yi Liu, Mithilesh K. Das, William Combs, Jonathan F. Wenk, Julius M. Guccione, Ghassan S. Kassab
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2011)
Article
Biophysics
Xuefeng Zhao, Madhavan L. Raghavan, Jia Lu
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2011)
Article
Biophysics
Xuefeng Zhao, Jonathan F. Wenk, Mike Burger, Yi Liu, Mithilesh K. Das, William Combs, Liang Ge, Julius M. Guccione, Ghassan S. Kassab
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2011)
Article
Materials Science, Multidisciplinary
Huan Chen, Yi Liu, Xuefeng Zhao, Yoram Lanir, Ghassan S. Kassab
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2011)
Article
Biology
Xuefeng Zhao, Yi Liu, Wei Zhang, Chong Wang, Ghassan S. Kassab
JOURNAL OF THEORETICAL BIOLOGY
(2011)
Article
Mechanics
E. Mubai, D. P. Mason
Summary: The two-dimensional turbulent thermal classical far wake is investigated in this study. The turbulence is described using the Boussinesq hypothesis for Reynolds stresses and Prandtl's mixing length model for eddy viscosity and eddy thermal conductivity. Two conservation laws are derived for the thermal boundary layer equations using the multiplier method, and two conserved quantities are obtained from the conserved vectors and boundary conditions. Lie point symmetry associated with the momentum and thermal conserved vectors is derived, showing that the momentum and thermal mixing lengths are proportional. An invariant solution is obtained numerically using a shooting method, and analytically when v = 0, kappa = 0.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Daniel J. Arrigo, Travis C. Chism
Summary: This paper investigates the governing equations for plane stress deformations of isotropic incompressible hyperelastic materials. The authors previously discovered a linearization method for the plane strain case of the Varga material, and in this paper, they further demonstrate that the governing equations for the plane stress case can also be linearized.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
A. P. Chugainova, R. R. Polekhina
Summary: This article numerically investigates the conditions for the decay of a nonlinear wave into a system of waves traveling at different velocities in a viscoelastic weakly anisotropic medium. Solutions of a hyperbolic system of equations are studied in the region of nonuniqueness of parameters, where a solution to the Riemann problem can be constructed with both a single wave and a system of waves corresponding to the same initial data.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Yu. N. Grigoriev, E. I. Kaptsov, S. V. Meleshko
Summary: This paper studies the mathematical properties of gasdynamics equations with thermochemical nonequilibrium and provides solutions for two different models. The results show that the solutions to the modified system of equations are physically consistent and can describe the effects of thermochemical nonequilibrium.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Y. Hao, X. Y. Guo, Y. B. Fu
Summary: This paper investigates the nonlinear stochastic dynamic response of a three-degree-of-freedom(3-DOF) airfoil with high substructural nonlinearity under vertical turbulent disturbances. The effects of parameters such as the incoming velocity, turbulence scale and intensity on the stochastic dynamics behavior of the system are clarified.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
T. Flament, J. -F. Deu, A. Placzek, M. Balmaseda, D. -M. Tran
Summary: This paper focuses on the numerical computation of vibrations in geometrically nonlinear structures induced by aeroelastic coupling with fluid flow using reduced order models (ROM). The proposed ROM formulation utilizes projection on a basis of reduced dimension enhanced with dual modes, allowing for the accurate capture of dynamic characteristics and adaptation to unsteady aerodynamic loads. The limitations of the classical Implicit Condensation method are highlighted, while the ROM proposed overcomes these limitations and accurately captures the dynamics.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Sidhartha Sankar Roy, Kishore Chandra Biswal
Summary: This study investigates the non-linear slosh dynamics of a sloped wall tank with a bottom-mounted object under seismic excitation. The potential flow theory is used to model the liquid domain using a mixed Eulerian-Lagrangian method. The study successfully quantifies the non-linear seismic response of the tank and the influence of the internal object on the hydrodynamic behavior. A parametric investigation is conducted by altering the object's height. Comparison with linear analysis justifies the necessity of non-linear analysis. The developed non-linear finite element model is found to be more effective and can be used in designing structure-coupled sloped wall TLDs.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Kapil Dev, Om P. Suthar
Summary: This study presents stability analyses of thermosolutal convection in a Newtonian fluid-saturated Darcy porous layer under non-uniform inclined heating, considering the presence of the Soret effect. The results reveal the destabilizing effect of the solutal Darcy-Rayleigh number and Lewis number on the system's stability, while the Soret parameter has a non-monotonic effect depending on the horizontal Rayleigh number.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Sandhya Maurya, Dia Zeidan, Manoj Pandey
Summary: This paper investigates a two-phase mass flow model governed by gravity, which involves solid particles and a viscous fluid. By utilizing the Lie symmetries admitted by the system, similarity solutions for the (2+1)-dimensional two-phase mass flow model are obtained. Through analytical solutions and numerical analysis, the physical behaviors of the resulting systems are successfully analyzed.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Longfei Tan, Wei Zhang, Zixun Wang, Bowen Hou, Wei Sun
Summary: This study investigates the factors influencing the stiffness variation characteristics of a bolted joint during service, including macro deviation, micro-topography, and hysteresis characteristics. Through experiments and finite element modeling analysis, it is found that macro deviations and micro-topography on the bearing surface can cause irregular dynamic changes in the stiffness of the bolted joint, significantly affecting the dynamic/static response of the entire structure.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)
Article
Mechanics
Yu Xiao, Ze-Qi Lu, Nan Wu
Summary: This study investigates the characteristics of a magnet-engaged nonlinear piezoelectric energy generator stimulated by friction-induced vibration (FIV) in two distinct design configurations (in parallel and in-series). The results indicate that factors such as decay factor, dynamic friction coefficient, static friction coefficient, and normal force have an effect on the stability of the system and the generation of FIV. The in-parallel systems exhibit a higher charging power within the same operating range, while the in-series systems are more likely to excite FIV with a wider operating range.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2024)