Accession Number:

AD1085676

Title:

Dynamic Compression Strength of Ceramics: Results from an Interlaboratory Round-Robin Exercise

Descriptive Note:

Technical Report,01 Nov 2017,30 Apr 2019

Corporate Author:

US Army Combat Capabilities Development Command Army Research Laboratory Aberdeen Proving Ground United States

Personal Author(s):

• Swab,Jeffrey J.
• Quinn,George D.

Report Date:

2019-11-01

Pagination or Media Count:

58.0

Abstract:

The dynamic compressive strength of a commercial alumina was determined by five participants using the split-Hopkinson pressure bar SHPB method with a dumbbell-shaped specimen. Each participant used their own SHPB test apparatus and imaging setup to conduct the tests and capture the fracture process. The dumbbell-shaped specimen was designed to increase the likelihood of fracture commencing in the specimen gage section rather than at the interface of the specimen and the SHPB bars. The participants had a good success rate between 40 and 80 of tests being valid, even though this was the first time several of the participants had used this specimen geometry. The average dynamic compression strength from the five participants was in excellent agreement with each other and ranged from 4.40 to 4.92 GPa with a grand average of 4.61 plus or minus 0.25 GPa the average of the laboratory averages. The high success rate and remarkable consistency of the results show that the dumbbell-shaped specimen is an appropriate geometry to determine the dynamic compression strength of advanced ceramics using the SHPB test methodology.

Descriptors:

• Compressive Strength
• ceramic materials
• test and evaluation
• high speed cameras
• Stress strain relations
• strain rate
• Statistical analysis

Subject Categories:

• Mechanics
• Ceramics, Refractories and Glass
• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE