Photo: Iben Julie Schmidt

Composites and Materials Mechanics (COM)

The Section for Composites and Materials Mechanics on manufacturing of new types of composite materials with aligned, continuous fibers, and improved description of existing composite materials, in particular with respect to strength, fatigue, fracture, durability and resistance to damage.

The scientific competences of the Composites and Materials Mechanics are within five disciplines: manufacturing, microstructure characterization, modelling, mechanical characterization and damage detection.  

Manufacturing of new types of composite materials, test specimens and prototypes is done in a dedicated “Fiberlab” laboratory by vacuum infusion, autoclave consolidation or hot pressing. Preparation of test specimen is done by cutting, grinding, polishing and adhesive bonding. Process control is conducted by using process modelling and embedded sensors. Microstructural characterization (fibre distribution, porosity and manufacturing defects) is made using optical microscopy and scanning electron microscopy. Numerical and analytical modelling is used for describing or predicting the mechanical properties of materials by phenomenological or micromechanical models. Examples are stress-strain laws, cohesive laws and fatigue life laws using solid mechanics, damage mechanics and fracture mechanics concepts. Modelling also includes the design of new, improved test specimens and testing ––methods. Mechanical characterization, conducted in a world class Mechanical Testing Laboratory, covers experimental characterization of mechanical properties of fiber composites, measurement of deformation and strain fields, stiffness, strength, fracture toughness, cohesive laws and fatigue lifetime. 

Damage detection is conducted using acoustic emission, thermography and non-destructive evaluation methods like ultrasound scanning, X-ray radiography and X-ray tomography.

Three teams:
COM consists of three different teams: Manufacturing and Microstructure Characterization, Modelling of Materials Mechanics, Mechanical Characterization and Damage Detection

Manufacturing and Microstructure Characterization
The team addresses manufacturing of new types of composite materials, test specimens and prototype by vacuum infusion, autoclave consolidation or hot pressing. Preparation of test specimen by cutting, grinding, polishing and adhesive bonding. Process control by process modelling, microscopy, embedded sensors.

Modelling of Materials Mechanics
The team works with numerical and analytical modelling to describe or predict the mechanical properties of materials by phenomenological or micromechanical models. Modelling of stress-strain laws, cohesive laws and fatigue life laws using solid mechanics, damage mechanics and fracture mechanics concepts.

Mechanical Characterization and Damage Detection
The team addresses experimental characterization of mechanical properties of fiber composites, measurement of deformation, stiffness, strength, cohesive laws and fatigue lifetime. Development of improved mechanical testing methods and test specimen design, damage detection and non- destructive evaluation.


Head of Section

Bent F. Sørensen
Head of Section, Professor
DTU Wind Energy
+45 46 77 58 06