| About this Abstract |
| Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Presentation Title |
A Study of ASTM C273 Core Shear Test Protocol |
| Author(s) |
Patrick J. O'Callaghan, Rory Roberson , Curtis sharkey |
| On-Site Speaker (Planned) |
Patrick J. O'Callaghan |
| Abstract Scope |
Honeycomb structures have widespread use in engineering. They provide a strong, efficient method for reacting structural loads. The design of these structures requires that the face sheets react in plane and bending loads and the core reacts the transverse load. Knowledge of core material properties is required, and several test methods are available to the design engineer to develop these properties. ASTM C393 generates core shear properties by flexure of a beam while ASTM C273 generates core shear properties by bonded loading plates loaded in either tension or compression. ASTM C273 is preferred method for generating core shear strength and modulus, and two test procedures are defined. One procedure specifies loading the specimen in tension and the second specifies compression loading. The ASTM protocol notes that “the test does not produce pure shear, but the specimen length is prescribed so that secondary stresses have a minimum effect”. The test protocol allows for either tensile or compressive loading to be used.
Testing and analysis are performed to determine the effectiveness of the ASTM C273 test procedure. Issues are identified in this paper with the shear modulus measured. It is shown that the strength measurements using either compression or tension loaded shear specimens are identical. It is shown that the core shear modulii obtained using this test protocol is dependent on the direction of loading applied. This supports the test data published by Bolf et al. A recommendation is made for a modification to the test protocol to address the issues described.
NAVAIR Public Release 2024-0051. Distribution Statement A – “Approved for public release; distribution is unlimited.” |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |