![Figure 2.](/ServeContent?url=http%3A%2F%2Fdbm.sagepub.com%2Fcontent%2F3%2F1758736012456543%2FF2.medium.gif)
Figure 2.
(a) A piece of a material that is unloaded and (b) a distributed tensile force (F) elongates the piece of material.
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(a) A piece of a material that is unloaded and (b) a distributed tensile force (F) elongates the piece of material.