Not that at the 1:35 point in the video the time on the phone is 2:26. At the end of the test, around 2:33 point in the video, the time is 1:59. Meaning the segment where he bent the phone was filmed after him showing the bent phone. Why is this important? Because it tells me that the phone was bent previous to shooting his video, and he un-bent the phone, then bent the phone again for the demo. Why is that important? Because one way you make something stiff is to laminate it: when something is made from multiple layers, each layer enforces the previous layer and if the laminate is glued across the entire surface, the glued layers help maintain stiffness by preventing individual layers from deforming and sliding against adjacent layers. (en.wikipedia.org/wiki/Lamination) The iPhone, like Android phones, like tablets, are made up of multiple layers which are glued together. Each layer may by itself be quite bendable, but because it is glued against other layers, the whole sandwich resists bending far more than the individual layers. (This is how plywood and carbon fiber works.) *BUT* If the device is subject to enough force, the layers of glue will give way, and the whole thing will delaminate and bend. And once its delaminated--once the glue has failed and the layers have separated--bending is very easy because the glue is no longer keeping the layers from sliding and the individual layers are free to bend on their own. Which would explain why his phone wanted to bend behind the buttons: because when the phone was previously bent in his pocket, that is the area where the phone delaminated. Other phones which were subject to extreme stresses which triggered delamination will be prone to bending where the delamination took place. And again, this is true of iPhones, of Android phones, or larger tablets. And it also explains why, even though the demo makes the iPhone 6 Plus look as soft as butter and incredibly easy to bend, so far Apple has only received 9 reports of phone bending.
Posted on: Fri, 26 Sep 2014 15:20:45 +0000
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