Medizinische Universität Graz - Research portal

Go directly to the nagivation.
Go directly to the content.

Navigation/Search

Selected Publication:

SHR Neuro Cancer Cardio Lipid Metab Microb

Zwirner, J; Ondruschka, B; Scholze, M; Thambyah, A; Workman, J; Hammer, N; Niestrawska, JA.
Dynamic load response of human dura mater at different velocities.
J Mech Behav Biomed Mater. 2023; 138:105617 Doi: 10.1016/j.jmbbm.2022.105617
Web of Science PubMed FullText FullText_MUG

Leading authors Med Uni Graz: Niestrawska Justyna Anna
Co-authors Med Uni Graz: Hammer Niels
Altmetrics:
Dimensions Citations:
Plum Analytics:
Scite (citation analytics):
Abstract:: Despite of its assumed role to mitigate brain tissue response under dynamic loading conditions, the human dura mater is frequently neglected in computational and physical human head models. A reason for this is the lack of load-deformation data when the dura mater is loaded dynamically. To date, the biomechanical characterization of the human dura mater predominantly involved quasi-static testing setups. This study aimed to investigate the strain rate-dependent mechanical properties of the human dura mater comparing three different velocities of 0.3, 0.5 and 0.7 m/s. Samples were chosen in a perpendicular orientation to the visible main fiber direction on the samples' surface, which was mostly neglected in previous studies. The elastic modulus of dura mater significantly increased at higher velocities (5.16 [3.38; 7.27] MPa at 0.3 m/s versus 44.38 [35.30; 74.94] MPa at 0.7 m/s). Both the stretch at yield point λ_f (1.148 [1.137; 1.188] for 0.3 m/s, 1.062 [1.054; 1.066] for 0.5 m/s and 1.015 [1.012; 1.021] for 0.7 m/s) and stress at yield point σ_f of dura mater (519.14 [366.74; 707.99] kPa for 0.3 m/s versus 300.52 [245.31; 354.89] kPa at 0.7 m/s) significantly decreased with increasing velocities. Conclusively, increasing the load application velocity increases stiffness and decreases tensile strength as well as straining potential of human dura mater between 0.3 and 0.7 m/s. The elastic modulus of human dura mater should be adapted to the respective velocities in computational head impact simulations.
Find related publications in this database (using NLM MeSH Indexing): Humans - administration & dosage; Tensile Strength - administration & dosage; Dura Mater - physiology; Elastic Modulus - physiology; Brain - administration & dosage; Biomechanical Phenomena - administration & dosage
Find related publications in this database (Keywords): Collagen; Dura mater; Dynamic tensile test; Elastic modulus; Ultimate tensile strength