Abstract

The finite element model Virtual Human Jo provides insights into the stresses and strains within the human body. This enables the analysis of supporting structures in terms of their effectiveness in preventing pressure injuries.
Due to existing contact definitions between tissue and bones, the range of motion in the hip joint is currently restricted. The aim of this project was therefore to develop an enhanced tissue model that increases mobility and meets the requirements of various applications, such as intensive care beds or reclining seat positions in vehicles.

All models and simulations were conducted on the 3DEXPERIENCE® platform. Firstly, the anatomical structure of the human tissue layers was analysed. Based on scientific studies, specific values were determined to describe the contact properties between different tissue structures. Subsequently, starting from an initial model, two further half-sided models of the pelvis and thigh region, incorporating bone, muscle, fat and skin tissue, were developed to enhance realism.

The adaptation of the contact modelling and optimisation of material properties led to the desired increase in hip joint mobility. In a final step, a case study was carried out, comparing two detailed models with varying friction coefficients. The results demonstrated that the more realistic model incorporating multiple tissue layers, provided clear benefits in terms of model behaviour as well as critical deformation and strain values within tissue.

Slide deck

Presenter Bio

After finishing high school, Martin Eschenbach began his tertiary education pathway with a Franco-German bachelor’s degree in mechanical engineering at the partner universities in Metz and Saarbrücken. He then decided to do a practical apprenticeship as an orthopedic technician in Memmingen. Wanting to further explore the interesting topic of mechanics in medicine, he went on to complete a further bachelor's degree in biomechanics in Offenburg. The highlight of his studies was his final thesis at SIMUSERV GmbH, of which he will be presenting the results at the SIMULIA Regional User Meeting.