US 11,717,897 B1
Mode I fracture testing fixture
Timothy Briggs, Brentwood, CA (US)
Assigned to National Technology & Engineering Solutions of Sandia, LLC, Albuquerque, NM (US)
Filed by National Technology & Engineering Solutions of Sandia, LLC, Albuquerque, NM (US)
Filed on Jan. 12, 2022, as Appl. No. 17/574,274.
Application 17/574,274 is a division of application No. 16/878,731, filed on May 20, 2020, granted, now 11,298,754.
Int. Cl. B23B 47/28 (2006.01); G01M 5/00 (2006.01); G01N 3/08 (2006.01)
CPC B23B 47/288 (2013.01) [G01M 5/0033 (2013.01); G01N 3/08 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A test fixture for conducting a Double Cantilever Beam (DCB) test comprising:
upper and lower pin block hangers adapted to receive an applied fracturing load; and
at least two rotating pin blocks, each of the at least two rotating pin blocks including a specimen pin and a hanger full-round pin, each specimen pin substantially parallel to a corresponding full-round pin, each specimen pin being a specimen half-round pin or a specimen full-round pin, each hanger full-round pin adapted to rotationally mechanically couple to a corresponding one of the upper and lower pin block hangers, each specimen pin adapted to rotationally mechanically couple to a DCB specimen;
wherein the applied fracturing load is transferred from the upper and lower pin block hangers to the DCB specimen via the at least two rotating pin blocks; and
wherein the DCB specimen has a single hole, the single hole adapted to receive each specimen pin.