The Role of Fiber-Matrix Interactions in a Nonlinear Fiber-Reinforced Strain Energy Model of Tendon

2004 ◽  
Vol 127 (2) ◽  
pp. 345-350 ◽  
Author(s):  
Heather Anne L. Guerin ◽  
Dawn M. Elliott
Keyword(s):  
Mathematical Model ◽  
Mechanical Behavior ◽  
Goodness Of Fit ◽  
Soft Tissues ◽  
Stress Strain ◽  
Isotropic Matrix ◽  
Matrix Interaction ◽  
Interaction Terms ◽  
Matrix Interactions ◽  
Fiber Matrix

The objective of this study was to develop a nonlinear and anisotropic three-dimensional mathematical model of tendon behavior in which the structural components of fibers, matrix, and fiber-matrix interactions are explicitly incorporated and to use this model to infer the contributions of these structures to tendon mechanical behavior. We hypothesized that this model would show that: (i) tendon mechanical behavior is not solely governed by the isotropic matrix and fiber stretch, but is also influenced by fiber-matrix interactions; and (ii) shear fiber-matrix interaction terms will better describe tendon mechanical behavior than bulk fiber-matrix interaction terms. Model versions that did and did not include fiber-matrix interaction terms were applied to experimental tendon stress-strain data in longitudinal and transverse orientations, and the R2 goodness-of-fit was evaluated. This study showed that models that included fiber-matrix interaction terms improved the fit to longitudinal data (RToe2=0.88,RLin2=0.94) over models that only included isotropic matrix and fiber stretch terms (RToe2=0.36,RLin2=0.84). Shear fiber-matrix interaction terms proved to be responsible for the best fit to data and to contribute to stress-strain nonlinearity. The mathematical model of tendon behavior developed in this study showed that fiber-matrix interactions are an important contributor to tendon behavior. The more complete characterization of mechanical behavior afforded by this mathematical model can lead to an improved understanding of structure-function relationships in soft tissues and, ultimately, to the development of tissue-engineered therapies for injury or degeneration.

Fiber-Matrix Interactions in Tendon Anisotropic Tensile Behavior

2003 ◽  
Author(s):  
Heather Anne Lynch ◽  
Dawn M. Elliott
Keyword(s):  
Mechanical Behavior ◽  
Three Dimensional ◽  
Tensile Behavior ◽  
Experimental Stress ◽  
Anisotropic Model ◽  
Stress Strain ◽  
Matrix Interactions ◽  
Strain Data ◽  
Fiber Matrix

A three dimensional anisotropic model for tendon behavior was used to fit experimental stress-strain data. This model was motivated by tendon microstructure and included the contributions of fibers, matrix, and fiber-matrix interactions. Our results suggest that fiber-matrix interactions contribute to tendon mechanical behavior.

Simple shearing of rubberlike materials filled with parallel fibers at large strain

2016 ◽  
Vol 51 (11) ◽  
pp. 1643-1651 ◽  
Author(s):  
CS Moreira ◽  
LCS Nunes
Keyword(s):  
Mechanical Behavior ◽  
Soft Tissues ◽  
Large Strain ◽  
Correlation Method ◽  
Image Correlation ◽  
Fiber Reinforced ◽  
Single Family ◽  
Parallel Fibers ◽  
Fiber Matrix ◽  
Rubberlike Materials

The purpose of this paper is to investigate the mechanical behavior of fiber-reinforced incompressible nonlinearly elastic solids under large simple shear deformations. Two different rubberlike materials, with distinct properties of adhesion, were reinforced by a single family of parallel fibers of nylon. Fibers of nylon 6 monofilament fishing line with diameters of 0.25, 0.45, and 0.80 mm were used. Fiber-reinforced specimens were tested under monotonic load at constant temperature, and values of amount of shear were obtained by the digital image correlation method. A phenomenological constitutive model is proposed to predict the mechanical behavior of the transversely isotropic materials. The proposed model takes into account the shear and stretch in the fiber, and fiber-matrix iterations. These iterations are related to the quality of the fiber-matrix bonding and fibers pullout. The obtained results can be useful in understanding the mechanical behavior of fiber-reinforced rubberlike solids and fibrous soft tissues.

A device for testing mechanical properties of biological materials--the "Biodyne"

1975 ◽  
Vol 39 (5) ◽  
pp. 863-867 ◽  
Author(s):  
J. G. Pinto ◽  
J. M. Price ◽  
Y. C. Fung ◽  
E. H. Mead
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
System Performance ◽  
Soft Tissues ◽  
Biological Materials ◽  
Material Testing ◽  
Stress Strain ◽  
Manual Operation ◽  
Testing Procedures ◽  
As Stress

An electromechanical servo-controlled device has been developed. This device can be used to test the mechanical behavior of a wide variety of biological soft tissues. Control and execution of material testing procedures such as stress-strain, vibration, relaxation, creep etc. can be performed by manual operation of the device or by interfacing it with a laboratory type minicomputer. Experiments on excitable tissues such as muscle can also be executed. The design details and system performance are discussed.

scholarly journals A computational framework for modeling cell–matrix interactions in soft biological tissues

2021 ◽  
Author(s):  
Jonas F. Eichinger ◽  
Maximilian J. Grill ◽  
Iman Davoodi Kermani ◽  
Roland C. Aydin ◽  
Wolfgang A. Wall ◽  
...  
Keyword(s):  
Soft Tissues ◽  
Three Dimensional ◽  
Biological Tissues ◽  
Computational Framework ◽  
Cell Matrix ◽  
Physiological Processes ◽  
Matrix Interactions ◽  
Mechanical Homeostasis ◽  
Cell Matrix Interactions ◽  
Short Time

AbstractLiving soft tissues appear to promote the development and maintenance of a preferred mechanical state within a defined tolerance around a so-called set point. This phenomenon is often referred to as mechanical homeostasis. In contradiction to the prominent role of mechanical homeostasis in various (patho)physiological processes, its underlying micromechanical mechanisms acting on the level of individual cells and fibers remain poorly understood, especially how these mechanisms on the microscale lead to what we macroscopically call mechanical homeostasis. Here, we present a novel computational framework based on the finite element method that is constructed bottom up, that is, it models key mechanobiological mechanisms such as actin cytoskeleton contraction and molecular clutch behavior of individual cells interacting with a reconstructed three-dimensional extracellular fiber matrix. The framework reproduces many experimental observations regarding mechanical homeostasis on short time scales (hours), in which the deposition and degradation of extracellular matrix can largely be neglected. This model can serve as a systematic tool for future in silico studies of the origin of the numerous still unexplained experimental observations about mechanical homeostasis.

scholarly journals Dynamic Single-Fiber Pull-Out of Polypropylene Fibers Produced with Different Mechanical and Surface Properties for Concrete Reinforcement

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 722
Author(s):  
Enrico Wölfel ◽  
Harald Brünig ◽  
Iurie Curosu ◽  
Viktor Mechtcherine ◽  
Christina Scheffler
Keyword(s):  
Tensile Strength ◽  
Dynamic Loading ◽  
Melt Spinning ◽  
Structural Changes ◽  
High Surface ◽  
Single Fiber ◽  
Scanning Calorimetry ◽  
Matrix Interaction ◽  
Pull Out ◽  
Fiber Matrix

In strain-hardening cement-based composites (SHCC), polypropylene (PP) fibers are often used to provide ductility through micro crack-bridging, in particular when subjected to high loading rates. For the purposeful material design of SHCC, fundamental research is required to understand the failure mechanisms depending on the mechanical properties of the fibers and the fiber–matrix interaction. Hence, PP fibers with diameters between 10 and 30 µm, differing tensile strength levels and Young’s moduli, but also circular and trilobal cross-sections were produced using melt-spinning equipment. The structural changes induced by the drawing parameters during the spinning process and surface modification by sizing were assessed in single-fiber tensile experiments and differential scanning calorimetry (DSC) of the fiber material. Scanning electron microscopy (SEM), atomic force microscopy (AFM) and contact angle measurements were applied to determine the topographical and wetting properties of the fiber surface. The fiber–matrix interaction under quasi-static and dynamic loading was studied in single-fiber pull-out experiments (SFPO). The main findings of microscale characterization showed that increased fiber tensile strength in combination with enhanced mechanical interlocking caused by high surface roughness led to improved energy absorption under dynamic loading. Further enhancement could be observed in the change from a circular to a trilobal fiber cross-section.

Mechanical Characterization of Assemblies Bonded With Pressure-Sensitive Adhesives (PSAs)

2015 ◽  
Author(s):  
Hao Huang ◽  
Abhijit Dasgupta ◽  
Ehsan Mirbagheri ◽  
Srini Boddapati
Keyword(s):  
Mechanical Behavior ◽  
Failure Modes ◽  
Mechanical Characterization ◽  
Bonding Temperature ◽  
Process Conditions ◽  
Second Phase ◽  
Loading Conditions ◽  
Stress Strain ◽  
Strain Behavior ◽  
Pressure Sensitive

The focus of this paper is on the stress-strain behavior and creep response of a pressure-sensitive adhesive (PSA) with and without carrier layers. This study consists of two phases. The first phase focuses on understanding of the effects of fabrication profiles, including bonding pressure, bonding temperature, bonding time, and aging time, on the PSA joint strength. This part of the study is used to identify an acceptable bonding and aging conditions for manufacturing a robust PSA bonded assembly. Specimens fabricated with this selected set of bonding process conditions are then used for mechanical characterization. The second phase focuses on the assembly’s mechanical behavior (stress-strain behavior and the creep curves) under different loading conditions, including loading stress, loading rate, and loading temperature. The mechanical behavior of PSA bonded assemblies is affected not only by the loading conditions, but also by the assembly architecture. The mechanical behaviors and failure modes of PSAs with and without carrier layers are compared. The reasons for these differences are also discussed.

Biomechanics of Soft Tissues: The Role of the Mathematical Model on Material Behavior

2019 ◽  
pp. 301-311
Author(s):  
Carlos Bustamante-Orellana ◽  
Robinson Guachi ◽  
Lorena Guachi-Guachi ◽  
Simone Novelli ◽  
Francesca Campana ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Soft Tissues ◽  
Material Behavior ◽  
The Mathematical Model
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