February 16, 2021

Adaptive Functional Structures Inspired by Dragonfly Wings

Ali Khaheshi - Inspired by the structure-function principles of dragonfly wings, we developed structural elements with variable stiffness which make a compromise between ...
February 15, 2021

The Relationship between Mechanical Properties and Structure/Composition of Locust Cuticle

Chuchu Li - The aim of the study is to discover the mechanical properties of the cuticle in different body parts of the locust Locusta migratoria. For this purpose, nanoindentation technique is used to probe the cuticle at various ...
March 10, 2020

Influence of the Structural Elements and Material Gradients on the Interaction of Contact Pairs

Mohsen Jafarpour - What are the crucial parameters in the contact of different parts? In this project we aim to (I) study the strategies used for interlocking, joining, or interacting of surfaces with different properties, (II) investigate the influence of material distribution and ...
March 10, 2020

Development of an Application for 3D Modeling of Insect Wings using Computer Vision

Shahab Eshghi - The development of a precise model is the first step in any finite element analysis. Taking the geometrical complexity of many biological and engineering structures into account, the process of modeling could be very time consuming and ...
February 20, 2020

Functional Design of Beetle Leg Joints: Morphology, Tribology, and Cuticular Microstructure

Konstantin Nadein - Joints are responsible for the interaction between different parts of limbs; they allow movements and provide mechanical support. This makes joints one of the key elements of locomotory systems. The goal of this research is to describe the morphology and ...
February 12, 2019

Microscopic Analyses of Arthropod Exoskeleton Autofluorescences

Jan Michels -This project aims at improving the understanding of autofluorescences that are exhibited by arthropod exoskeletons. By visualizing these autofluorescences, it is possible to reveal differences in the autofluorescence composition that indicate ...
February 11, 2019

Functional Morphology of Dragonfly Wings

Esther Appel - Dragonflies propel themselves skilfully through the air at high speeds and with an exceptional high lift production and manoeuvrability. Many Odonata have vividly coloured wings, which they display to visiting females or rivals in sexual or territory displays. When coming into contact with water, either accidentally, e.g. during ...
February 9, 2019

Functional Morphology of Stick Insect Tarsi

Thies Büscher - My current project focuses on the functional morphology, biomechanics and material composition of the attachment systems in insects in general and stick and leaf insects (Phasmatodea) in particular. I further use stick and leaf insects as a model system to assess evolutionary, phylogenetic, ecological and biogeographical aspects of this character system.
February 7, 2019

Functional Morphology and Biomechanics of the Locomotory Apparatus in Dung Beetles

Nienke Bijma - Locomotion is the result of a complex interplay between an animal and its environment. To understand how dung beetles walk over complex and uneven terrain or how they perform complex behaviour such as building and rolling dung balls, we investigate ...
February 5, 2019

A Plant Surface as a Substrate for Insect Attachment

Elena Gorb - The aim of this project is to examine effects that different structures occurring on a plant surface have on attachment ability of insects. Emphasis is put on surfaces exhibiting anti-adhesive properties (i.e. considerably worsening or preventing the adherence of insects), e.g. surfaces covered with trichomes, ...
February 1, 2019

Functional Morphology of Insects’ Elongated Reproductive Organs

Yoko Matsumura - The three sexual intertwining stages, “penetration”, “ejaculation”, and “sperm storage” are studied from a biomechanical point of view with a special focus on elongated reproductive organs in leaf beetles. The aim of the study is to unveil how structural variations affect its functionality, thereby we can understand how ...
January 30, 2019

Biomechanical Strategies Underlying the Robust Body Armour of an Aposematic Weevil

Hamed Rajabi - Adult aposematic Pachyrhynchus weevils have ~156 times greater load carrying capacity compared with their teneral counterparts. They achieve this characteristic in a period of ~4 weeks using the following structural and material strategies: the development of (i) a thick elytral cuticle, (ii) considerably large oval-shaped fibers, ...
January 24, 2019

Functional Morphology and Biomechanics of the Mouthparts in Odonata Larvae

Sebastian Büsse - Odonata larvae are important predators in their biotopes that catch their prey with a unique and highly efficient catching apparatus, known as prehensile mask, which is formed by the modified labium. By means of this prehensile mask the odonatan larvae are able to capture potentially fast moving organisms up to their own size. Usually, the nymphs ...
January 22, 2019

A Simple, High-Resolution, Non-Destructive Method for Determining the Spatial Gradient of the Elastic Modulus of Insect Cuticle

Hamed Rajabi - A first step towards understanding principles underlying the design of biological structures is to characterize their material properties. However, direct mechanical measurements on biological samples encounter numerous technical challenges. We developed a novel method for three-dimensional visualisation of the elastic modulus over volume of insect cuticle. This is ...
January 20, 2019

Resistance of Insect Leg Segments to Buckling

Hamed Rajabi - Quantitative data on changes in biomechanical properties of hindleg tibia cuticle during the entire life of the stick insect Carausius morosus indicate strategies preventing buckling of the tibia.
January 18, 2019

Dragonfly Wing Nodus: a One-Way Hinge Contributing to the Asymmetric Wing Deformation

Hamed Rajabi - Nodus is a specialized component of dragonfly wings. We demonstrated that although the presence of resilin in the nodus facilitates the wing deformability in flight, the specific geometry of the nodus restrains its displacements when subjected to pressure on the ventral side. This effect results in an interlocking mechanism and ...
January 16, 2019

Numerical Simulation of the Slow Viscoelastic Response of Resilin

Alexander Kovalev - Slow viscous responses with 1.7 and 16 s characteristic times were observed during microindentation of resilin from the wing hinge of Locusta migratoria: about a quarter of the mechanical response was assigned to a viscous component. Mechanical properties of resilin, which is highly important in invertebrate biomechanics, were characterized using ...