Mesomodel of the mechanical behavior of biological tissues under low-energy impact taking into account their layered structure

• Main Authors: Eremina, G. M., Smolin, A. Yu
• Format: Conference Proceeding
• Language: English
• Subjects: Bones; Cartilage; Composition; Computer simulation; Fractures; Mechanical properties; Musculoskeletal system; Regeneration; Strain; Stress concentration; Tissue engineering; Ultrasonic imaging; Ultrasound
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0034947

Ultrasound therapy looks very promising to treat degenerative changes in the musculoskeletal system and fractures. Computer simulation can help to reveal the acoustic low-energy effects on bone tissue. Usually, the model samples with averaged mechanical characteristics are used to simplify the simulations. However, such assumptions can distort the resulting stress and strain fields, which in turn could lead to an incorrect prediction of the bone tissue regeneration. This paper presents the results of ultrasound exposure of model samples of an elementary form of various compositions with explicit and implicit consideration of the biological tissue structure. The results obtained indicate a gradient distribution of the stress/strain fields with a decrease in the amplitude of the output parameters for model samples with averaged mechanical properties and a two-component composition (cortical and spongy tissue). The interface between the tissues serves as a “secondary” acoustic source as well as a barrier in the case of a two-component “cartilage-cortical tissue” model specimen; the maximum stresses are concentrated there.