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.

In order to facilitate industrial FE-analyses of large-scale structures, there is a need to develop methods that provide enough accuracy with rather large elements. We therefore develop methods where the adhesive layer is considered as a structural element. Similarly as the well-known structural theories of beams and shells, we consider the thickness of the adhesive layer as a parameter of the problem.

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

The strength of windshields and their joints to a car body is studied in the FFI-project Computational methods for crashworthiness assessment of windscreens (CompMethGlass, 2014-05-01 - 2016-06-30) within the SAFER joint research unit ( industrial partner is Volvo Cars. Local project leader Dr Thomas Carlberger.

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 leader Professor Ulf Stigh.

Lightweight joints (2013-14) 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 Thomas Carlberger.

Research group

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

Alexander Eklind, Graduate student (MSc)