Patent ID: 9645064
Date: 2017-05-09
CPC Classifications: G01N

Claim:
1. A method, comprising: positioning a substantially planar sample of glass on first and second anvils such that a bottom surface of the sample is at least partly supported by the first and second anvils; positioning a third anvil proximate a top surface of the sample of glass opposite the bottom surface, wherein the third anvil is supported by a carrier and is moveable with the carrier in a first direction toward the first and second anvils; causing a first impact between a mass disposed opposite the carrier and a piece of material having a known strain rate disposed on the carrier, wherein: determining a displacement of the carrier, caused by the first impact, at the failure point of the sample; determining a force applied to the piece of material, by the mass, at the failure point of the sample; determining a dynamic strength (σ(ε)) of the sample as a function of the strain rate and according to a first equation:  where F represents the force applied to the piece of material; L represents a horizontal distance between respective peaks of the first and second anvils; W represents a width of the sample, and T represents a thickness of the sample; and determining a dynamic modulus (M(ε)) of the sample as a function of the strain rate and according to a second equation: