Calculating the plasticity of adhesives in a test-rig design
Mehza, Ahmmed Zarif (2026)
Kandidaatintyö
2026
School of Energy Systems, Konetekniikka
Kaikki oikeudet pidätetään.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2026052050820
https://urn.fi/URN:NBN:fi-fe2026052050820
Tiivistelmä
Adhesive usage is increasing each day in joint design applications for better load distribution, stress mitigation and so on. This enables the material with joint to be able to avoid traditional bolted connections as these can reduce the durability of metal.
In this thesis, has been developed a numerical framework to calculate the plastic behavior of 3M Scotch-Weld DP760 in both single lap joint yielding under shear load and a hollow tubular joint under torsional loading.
Bonding method using adhesives have gained considerable presence in the design of mechanical structures in several industries, especially in the aeronautics and automobile industry.
Using a 1D shear-lag formulation, this study is implementing a finite difference solution combined with Newton-Raphson iterative solver to understand the material’s non-linear behavior. The constitutive model is based on the bilinear hardening law.
Additionally, this study calculates the load distribution system in an adhesive-reinforced tubular joint to demonstrate how bonding reduces bearing stresses in load bearing components by increasing fatigue life and reducing fracture potential. The numerical framework is being validated by comparing MATLAB outputs with Abaqus simulations for the Single Lap Joint Configuration. These calculations verify that 3M DP760 is suitable for high-load environments. The aim is to calculate the physical limitations of the selected adhesive and to identify the correct usage and time frame of its usability.
In this thesis, has been developed a numerical framework to calculate the plastic behavior of 3M Scotch-Weld DP760 in both single lap joint yielding under shear load and a hollow tubular joint under torsional loading.
Bonding method using adhesives have gained considerable presence in the design of mechanical structures in several industries, especially in the aeronautics and automobile industry.
Using a 1D shear-lag formulation, this study is implementing a finite difference solution combined with Newton-Raphson iterative solver to understand the material’s non-linear behavior. The constitutive model is based on the bilinear hardening law.
Additionally, this study calculates the load distribution system in an adhesive-reinforced tubular joint to demonstrate how bonding reduces bearing stresses in load bearing components by increasing fatigue life and reducing fracture potential. The numerical framework is being validated by comparing MATLAB outputs with Abaqus simulations for the Single Lap Joint Configuration. These calculations verify that 3M DP760 is suitable for high-load environments. The aim is to calculate the physical limitations of the selected adhesive and to identify the correct usage and time frame of its usability.