Soft material changes the shape when being stressed. 軟質材料受壓會改變形狀。
As a special case of the present problem, solutions for an interface rigid line and for collinear periodical rigid lines in a homogeneous material can be obtained. 從解答的特殊情形,可導出一條界面剛性線問題及均質材料中共線周期剛性線問題的解答。