Abstract A solid inclusion is embedded in a soft matrix supported by a rigid substrate. To simulate finger palpation, a spherical indenter exerts a vertical load on the matrix surface, followed by a lateral motion. A deep inclusion first rises close to the surface, dives under the indenter, and emerges from the leeside of the traversing indenter. The inclusion trajectory is essentially symmetric about the axis where the inclusion lies. A shallow inclusion is first pushed sideways, but an instability causes it to jump spontaneously to the rear following an asymmetric path. Such instability is a specific feature in hyperelastic materials.

中文翻译：

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软基质中嵌入固体夹杂物的手指触诊路径

摘要 固体夹杂物嵌入由刚性基底支撑的软基体中。为了模拟手指触诊，球形压头在基质表面施加垂直载荷，然后进行横向运动。较深的内含物首先升起靠近表面，潜入压头下方，然后从横穿压头的背风面出现。夹杂物轨迹基本上围绕夹杂物所在的轴对称。浅层内含物首先被推到一边，但不稳定导致它按照不对称的路径自发地跳到后面。这种不稳定性是超弹性材料的一个特殊特征。