Hi Omar Ben-Said,

There are two ways to model a beam: first, you can use the beam element and model the beam as a 2D part which will be a line and apply concentrated force at one of the endpoints. Or, model the beam as a 3D part in which you need to define a reference point for one end of the beam and make the Coupling constraint between them, then apply the Displacement/Rotation boundary condition and apply your desired bend loading.

I recommend referring to the links below. They will make it worth your while.

https://caeassistant.com/product/introduction-to-abaqus-tutorial-part1/#Section-Workshop-23323-8da6

https://caeassistant.com/product/abaqus-for-beginners-structural-engineers-in-the-field-of-civil-engineering/

Best regards.

Thank you Martin for your fruitful Answer .