Good day
I have the next model: platelets joined with a matrix with cohesive elements and an indenter (Figure 1). I fixed the perimeter of the model and I applied a displacement in the reference point of the indenter (Analytical rigid part) equal to 5 mmm against the platelets and the matrix. The displacement is applied with a smooth step because it is an explicit analysis (Figure 2). When the analysis finishes and I plot the Displacement vs time in the reference point of the indenter the displacement does not achieve the value of 5, only achieve 4 mm (Figure 3). Why does this happen? How can I fix this?

Abaqus ​​​​​​​