Fig. 2.

In constrained mixture models, a body is composed by n individual constituents, each consisting of multiple mass increments which were deposited with a prestretch F_pre(t) at different times. The elastic pre-stretch depends on the individual stress-free natural configuration of each constituent. All constituents undergo the same elastic deformation together, despite having been deposited with different pre-stretches at different times. Adapted with permission from Cyron and Humphrey [25].