<p><i>Challenges in Mechanics of Time-Dependent Materials</i><i>, </i><i>Mechanics of Biological Systems and Materials, and Micro-and Nanomechanics,</i><i> Volume 2 of the </i>Proceedings of the 2021 SEM Annual Conference &amp; Exposition on Experimental and Applied Mechanics, the second volume of four from the Conference, brings together contributions to this important area of research and engineering.&nbsp; The collection presents early findings and case studies on fundamental and applied aspects of Experimental Mechanics, including papers in the following general technical research areas: </p>

<p>&nbsp;Characterization Across Length Scales</p>

<p>Extreme Conditions &amp; Environmental Effects</p>

<p>Damage, Fatigue and Fracture</p>

Structure, Function and Performance<p></p>

<p>Rate Effects in Elastomers</p>

<p>Viscoelasticity &amp; Viscoplasticity</p>

<p>Research in Progress</p>

<p>Extreme Nanomechanics</p>

<p>In-Situ Nanomechanics</p>

<p>Expanding Boundaries in Metrology</p>

Micro and Nanoscale Deformation<p></p>

<p>MEMS for Actuation, Sensing and Characterization</p>

<p>1D &amp; 2D Materials</p>

<p>Cardiac Mechanics</p>

<p>Cell Mechanics </p>

<p>Biofilms and Microbe Mechanics</p>

<p>Traumatic Brain Injury</p>

Orthopedic Biomechanics<p></p>

<p>Ligaments and Soft Materials</p>