Mechanics of Materials

The group is concerned with the development of methods to calculate the strength of materials. To accomplish our goals, we work with experimental techniques, numerical methods (FEM) and theories for damage and fracture mechanics. Today, our work is focused on the strength of composite materials and adhesive joints. Increasing demands on lower emissions and decreased fuel consumption provide a strong driving force for changing from traditional engineering materials to light weight materials. Often these materials cannot be joined by welding. Adhesive joining provides an interesting technique that facilitates joining of different materials. Composite materials provide excellent strength and stiffness to weight ratios. They are often used in high demanding environments where the safety of the structure is essential. Within this field we develop methods to improve the predictability of strength properties.

Fracture is studied using the cohesive zone model. The ambition is to develop methods usable for large complex structures. To achieve our goal, we are also studying fracture at small scales considering the microstructure of materials. Current applications are delamination and compressive failure of carbon fibre composites, fatigue and fracure of adhesively joined structures, and strength of discreate joints. Properties of smart textiles are studied in a recently started project with the University of Borås. Cutting technology is also studied.

Most projects involves colaboration with Swedish industry.

At the moment we are not engaging new PhD-students.

A presentation is given on pages 46-47 in English  and in Swedish in the journal The Vehicle Component/Fordonskomponenten

A presentation in Swedish for the public TV

Current projects

Smart textiles (2014-2015) is a VGR-financed project with the University of Borås. Project members Dr Waseem Tahir and Professor Ulf Stigh.

Models to improve Design of Composites (MDC, 2014-2016) is a KKS financed project within KK-Miljö. The aim is to improve the capability to predict fracture of carbon fibre composites. Partners are Saab and GKN. Project members Mr Daniel Svensson, Dr Tobias Andersson, Ass Professor Svante Alfredsson and Professor Ulf Stigh (project leader).

Lightweight joints (2013-15) is a Volvo Preferred Academic Partner project aiming at lightweight joining solutions for industrial applications. Project leader is Dr Tobias Andersson.

PLUGG (2013-2016) is an FFI-financed project under the leading of Swerea IVF. It aims at developing  a joining methodology for joining lightweight materials such as composites in the car industry. Industrial partners are Volvo Car Company, Gestamp Hardtech, Stanley Black & Decker. Local project leader is Dr Tobias Andersson.

Research group

Ulf Stigh, Professor
Svante Alfredsson, Associate professor
Tobias Andersson, Senior lecturer
Karl Mauritsson, Senior lecturer
Waseem Tahir, Post doc (PhD)
Daniel Svensson, Graduate student (TeknLic) 
Tomas Walander, Graduate student (Tekn Lic)
Anders Biel, Senior lecturer, on leave Riso Lab, Roskilde, Denmark