Publications by authors named "C Arregui-Dalmases"
Background: Numerous prior studies hypothesized a power-law relationship (E∝ρ) between cortical bone Young's modulus (E) and density (ρ) with an exponent 2.3≤α≤3.0, that has not been previously justified in the literature on a theoretical level.
View Article and Find Full Text PDFMany previous studies on the mechanical properties of Parasagittal Bridging Veins (PSBVs) found that strain rate had a significant effect on some mechanical properties, but did not extensively study the viscoelastic effects, which are difficult to detect with uniaxial simple tensile tests. In this study, relaxation tests and tests under cyclic loading were performed, and it was found that PSBVs do indeed exhibit clear viscoelastic effects. In addition, a complete viscoelastic model for the PSBVs is proposed and data from relaxation, cyclic load and load-unload tests for triangular loads are used to find reference values that characterize the viscoelastic behavior of the PSBVs.
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- Researchers investigated the mechanical properties of cerebral bridging veins (CBVs) using advanced microtensile tests, revealing a nonlinear stress-strain response and viscoelastic behavior under cyclic loading.
- * Previous studies utilizing uniaxial tensile tests overlooked these viscoelastic effects, but the more sensitive methods used in this research allowed for their observation.
- * The study also includes a mathematical analysis explaining why previous tests didn't detect viscoelasticity and provides reference values and constitutive parameters for more accurate numerical simulations in future computational models.
Article Synopsis
- A study analyzed the mechanical properties of ribs from 64 human subjects of varying ages, sexes, and BMI to understand how these factors impact rib strength and flexibility.
- The researchers performed uniaxial tensile tests on rib bone samples, measuring properties like yield stress, ultimate stress, and resilience, aiming to isolate mechanical characteristics from shape influences.
- Results indicated that age significantly affects rib properties, with older age linked to lower failure stress and ultimate strain, and higher BMI further reduces strain in older individuals.
Prediction of mechanical properties of human rib cortical bone using fractal dimension.
Comput Methods Biomech Biomed Engin
April 2021
A large number of post mortem human subjects was used to investigate the relation between the micro-structure of rib cortical bone and the mechanical properties using Fractal Dimension. Uniaxial tensile tests were performed on coupons of rib cortical bone. Tensile strength, yield stress, Young's Modulus, maximum strain, and work to fracture were determined for each coupon.
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