Reminds me of an experiment in my undergraduate glass lab. Take soda-lime stirring rods and break 50 or so under 4 point bend test. Record strength. Take anoth

Reminds me of an experiment in my undergraduate glass lab. Take soda-lime stirring rods and break 50 or so under 4 point bend test. Record strength. Take another batch and simply log-roll them along the lab bench for half a meter. Repeat break test. Note the reduction in strength signficant at p=0.05 . Fracture toughness is a bear.