Multiscale method to modeling and simulation of the hybrid joints
2022-01-0386
03/29/2022
- Content
- Cars are responsible for around 12% of total EU emissions of carbon dioxide (CO2), the main greenhouse gas. Since 2009, EU legislation sets mandatory emission reduction targets for new cars. For 2025, EU fixed the limit of CO2 emissions of cars in 75g/km. One of the ways to reduce CO2 emissions of the vehicles is weight reduction thru the replacing metals with lighter materials, as natural materials, composite materials and light alloys. A new trend of today is of realizing hybrid structures constituted from metals and composite. In this case, the main question for hybrid material design is how to join dissimilar materials? In this work CRF explain the activities developed in some research project that answer this question with an laser welding technology between a thermoplastic CFRP and a high performance steel. With this technology, the materials are joint by melting the thermoplastic substrate with a laser without added adhesive at interface. In particular, this work explain the method for modelling of joints for application in FE models of the automotive structures. These models require simplified joints elements. Is been developed a multiscale method that uses a Computational Damage Mechanics formulation in a micromechanics analysis. However, they exist different traditional technology for join dissimilar material as bonded joints, bolted joints and Rivets. In the last part of the work is explained the extension of this method at other applications as the modeling of composites sandwich for the simulation of the joint between the polymeric core and composite skins.
- Citation
- Basso, M., "Multiscale method to modeling and simulation of the hybrid joints," SAE Technical Paper 2022-01-0386, 2022, .