How can I effectively model the interface between two sequentially cast layers of Normal concrete in Abaqus, where the first layer (20cm thick) is cast, and the second layer (5cm thick) is poured within an hour before the initial setting of the first layer? Additionally, should I simulate stages of curing and hardening for the Normal concrete material, or is it sufficient to address this through material interaction modelling?
Ahmad Al-shiekh, you do not need to simulate stages of curing and hardening for the Normal concrete material if you are only interested in the behavior of the concrete at a specific point in time, especially when it is hardened concrete. In this case, it is sufficient to address this through material interaction modeling. To effectively model the interface between two sequentially cast layers of normal concrete in Abaqus, you can use the following steps:
- Create a surface element set for each of the two concrete layers.
- Define a surface-based cohesive behavior for the interface. This can be done by specifying the tensile strength, shear strength, and fracture energy of the interface.
- Assign the surface-based cohesive behavior to the surface element sets for the two concrete layers.
- Define a contact interaction between the two concrete layers. This should be a contact with adhesion, and you should specify the same surface element sets for the master and slave surfaces.
- Set the friction coefficient between the two concrete layers to a value that is appropriate for the interface condition.
- Simulate it and you are done.
I hope it helps. If you are facing any difficulties, let me know on my WA; https://wa.me/+923440907874.
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