Optimal structural pattern for maximal compliance using topology optimization based on phasefields: Application to improve skin graft meshing efficiency. (20th October 2020)

• Record Type: Journal Article
• Authors: Sutula, Danas; Henyš, Petr; Čapek, Lukáš
• Is Part Of: International journal for numerical methods in biomedical engineering. Volume 36:Number 12(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-10-20
• Subjects: Biomedical engineering -- Periodicals; Imaging systems in medicine -- Periodicals; Numerical analysis -- Periodicals; Engineering mathematics -- Periodicals; 610.28
• DOI: 10.1002/cnm.3405
• Languages: English
• ISSNs: 2040-7939

Abstract

Abstract: This article focuses on the problem of maximal compliance design of a hyper‐elastic solid with the optimal design of human skin grafts as the application in mind. The solution method is a phasefield‐based topology optimization method that supposes multiple local phasefields and a minimum distance constraint in order to prevent the phasefields from merging. Consequently, structurally disintegrating solutions such as by the coalescence of voids can be prevented. The method is used to find an optimal graft meshing pattern for a sample that is subjected to a biaxial extension of up to 150%, which corresponds to an expansion ratio of 1 : 2.25. Three prospective unitcell solutions that exhibit meta‐material behavior are proposed for a periodic graft pattern. The results are a step toward improving the skin graft meshing efficiency. This work does not cover experimental validation. Abstract : The focus is on the maximal compliance design of a hyper‐elastic solid for the optimization of human skin grafts. A phasefield method is used to find an optimal graft meshing pattern for a sample that is subjected to a biaxial extension of up to 150%. Three unitcell patterns that exhibit meta‐material behavior are proposed. The results are a step toward improving the skin graft meshing efficiency. This work does not cover experimental validation.