  Microscopic stress fields are widely used in molecular simulations to
understand mechanical behavior. Recently, decomposition methods of multibody
forces to central force pairs between the interacting particles have been
proposed. Here, we introduce a force center of a three-body potential and
propose different force decompositions that also satisfy the conservation of
translational and angular momentum. We compare the force decompositions by
stress-distribution magnitude and discuss their difference in the stress
profile of a bilayer membrane using coarse-grained and atomistic molecular
dynamics simulations.
