To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1. Video of a silicone elastomer (Ecoflex 00-30) fracture test under a pure shear geometry (thickness = 3mm, stretch-rate λ⋅ = 0.1/min). This video plays 100x faster than the original speed. Sideways and stable crack propagation in a silicone elastomer Seunghyun Lee, and Matt Pharr PNAS. 2019. 116:9251-9256 DOI: 10.1073/pnas.1820424116 Download Original Video Browse All Videos »