Biological materials change their mass, shape, and porosity during the growth and possess high strength and durability at general lightweight design. Biological tissues are considered to be inhomogeneous anisotropic multiphase composites reinforced by fibres. A 2D problem of the load transfer from the growing fibre into the growing plate with different own growth rates and viscosity is consider...

We propose a dual-parameter detection method to realize the simultaneous optical absorption and viscoelasticity imaging based on photoacoustic lock-in measurement. Both optical absorption and viscoelasticity properties can be obtained simultaneously by analyzing the amplitude and phase of photoacoustic signals. This method is experimentally verified by imaging of gelatin phantoms with different...

We study the propagation of small amplitude waves superimposed on a large static deformation in a nonlinear viscoelastic material of differential type. We use bulk waves and surface waves to address the questions of dissipation and of material and geometric stability. In particular, the analysis provides bounds on the constitutive parameters and on the predeformation that ensure linearized stab...

The importance of viscoelasticity biological media that are used in medical ultrasounds has been discussed the literature. Furthermore, use microbubbles drastically improves efficiency both diagnostic and therapeutic ultrasounds. Weakly nonlinear wave equations for ultrasound propagation liquids containing have long studied, although liquid phase ignored simplicity. In this study, we derived a ...

Needle insertion is a minimally invasive technique in diagnosing and treating tumors. However, to perform a surgery accurately, the tissue should have minimum amount of displacement during needle insertion so that it reaches the target tissue. Therefore, the tissue membrane has to move less to decrease rupturing under the membrane. In this study, the effect of different design parameters on dis...

Abstract Biological phase separation forming membraneless organelles in cytoplasm and nucleus has attracted considerable attention. Liquid-like condensates are often created as spherical droplets. However, various with network-like morphologies, including protein granules, localisation bodies, centrosome assemblies, have recently been discovered cells. Therefore, what controls the morphology of...

Characterizing the mechanical properties of tissues is key for understanding fundamental biological processes such as morphogenesis or tumor progression. In particular, intercellular adhesion forces, mediated by transmembrane proteins like cadherins, are expected to control topology and viscoelastic behavior under stress. order understand influence in tissues, we use biomimetic emulsions which ...

Soft materials such as gels, elastomers, and biological tissues have diverse applications in nature technology due to their viscoelastic nature. These soft often exhibit complex rheology display elastic viscous characteristics when undergoing deformation. In recent years, fractional calculus has emerged a promising tool explain the behavior of materials. Scalar constants are primarily used quan...

The effective design of body armor requires the use of biomimicking materials that accurately and robustly reproduce the characteristic mechanical behavior of human tissues. The mechanical performance of the soft tissues is determined by their viscoelastic properties and for this reason the optimal soft tissue surrogate must viscoelastically mimic the original tissue. One traditional tissue sur...

Understanding and modelling liver biomechanics represents a significant challenge due to the complex nature of this organ. Unfortunately, there is no consensus on liver viscoelastic properties, and results are strongly dependent on sample type and status, adopted testing method, and testing conditions. Standard force-triggered tests (e.g. step response or dynamic mechanical tests) necessitate a...