Stephan Marzi
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View article: A novel FFT-based micromechanical modeling approach for the fracture behavior of a composite core in metal sandwich plates using a cohesive zone model
A novel FFT-based micromechanical modeling approach for the fracture behavior of a composite core in metal sandwich plates using a cohesive zone model Open
HybrixTM sandwich plates (Lamera AB, Gothenburg, Sweden) with metal face sheets could replace standard metal plates in many lightweight applications. Their composite core, which is crucial for the structural performance and the fracture be…
View article: A modified single-leg bending test to study mode III fracture of adhesive joints
A modified single-leg bending test to study mode III fracture of adhesive joints Open
The mode-III fracture behavior of structural adhesive joints is examined using a modification of the SLB specimen. Tests were performed on the adhesive SikaPower®-498. Crack growth resistance curves and traction separation laws in the cont…
View article: Influence of Loading Rate on the Cohesive Traction for Soft, Rubber-Like Adhesive Layers Loaded in Modes I and III
Influence of Loading Rate on the Cohesive Traction for Soft, Rubber-Like Adhesive Layers Loaded in Modes I and III Open
To date, the fracture behaviour of soft, polyurethane-based adhesive joints has rarely been investigated. This work contributes to the experimental investigation of such joints in modes I and III by performing double cantilever beam (mode …
View article: Fracture testing of adhesive joints in mixed-mode I+III
Fracture testing of adhesive joints in mixed-mode I+III Open
The Mixed-Mode Controlled Double Cantilever Beam (MC-DCB) test has been developed to test samples under mixed-mode loading in a combination of mode I and mode III. The mixed-mode ratio is defined based on J-integral and the principle of su…
View article: Numerical investigation on the effect of fillers on the fracture behavior of adhesives
Numerical investigation on the effect of fillers on the fracture behavior of adhesives Open
Adhesives are usually heterogeneous materials and contain fillers, e.g., glass beads, and voids, which are crucial for its fracture properties. Multiscale approaches using computational homogenization can link model descriptions of the mic…
View article: On the localisability of gaps in adhesive joints loaded in mode I
On the localisability of gaps in adhesive joints loaded in mode I Open
During the manufacturing process of adhesive bonds different faults can occur, leading to a loss of structural integrity of the entire structure. This requires a thorough study of the connection behaviour in the presence of faults and loca…
View article: A novel FFT-based homogenization scheme for cohesive zones
A novel FFT-based homogenization scheme for cohesive zones Open
Cohesive Zone Models with finite thickness are widely used for the fracture mechanical modeling of layers of material, e.g., adhesives. Within this approach, the whole layer is modeled as a Cohesive Zone. Moreover, computational homogeniza…
View article: Fracture of Thin-Walled Polyoxymethylene Bulk Specimens in Modes I and III
Fracture of Thin-Walled Polyoxymethylene Bulk Specimens in Modes I and III Open
Thin-walled polymeric components are used in many applications. Hence, knowledge about their fracture behavior in bulk is beneficial in practice. Within this study, the double cantilever beam (DCB) and out-of-plane double cantilever beam (…
View article: A Mixed-Mode Controlled DCB test on adhesive joints loaded in a combination of modes I and III
A Mixed-Mode Controlled DCB test on adhesive joints loaded in a combination of modes I and III Open
This work presents a novel test setup to determine the fracture behavior of adhesive joints subjected to mixed-mode I+III loading. Common mixed-mode tests are mainly focusing on a combination of modes I and II and are limited to approaches…
View article: Effect of crack opening velocity on fracture behavior of hyperelastic semi-structural adhesive joints subjected to mode I loading
Effect of crack opening velocity on fracture behavior of hyperelastic semi-structural adhesive joints subjected to mode I loading Open
Rubber-like adhesive joints provide substantial advantages compared to epoxy-based adhesive joints regarding their damping properties, fatigue resistance and energy consumption under impact. Polyurethane-based adhesives with high modulus a…