Stress evaluation in displacement-based 2D nonlocal finite element method

Aurora Angela Pisano, Paolo Fuschi
2018 Curved and Layered Structures  
The evaluation of the stress field within a nonlocal version of the displacement-based finite element method is addressed. With the aid of two numerical examples it is shown as some spurious oscillations of the computed nonlocal stresses arise at sections (or zones) of macroscopic inhomogeneity of the examined structures. It is also shown how the above drawback, which renders the stress numerical solution unreliable, can be viewed as the so-called locking in FEM, a subject debated in the early
more » ... bated in the early seventies. It is proved that a well known remedy for locking, i.e. the reduced integration technique, can be successfully applied also in the nonlocal elasticity context.
doi:10.1515/cls-2018-0010 fatcat:vyedeogydzdotlrrvkgykch33y