A newly developed Kolsky tension bar.

Conference · Mon Mar 01 04:00:00 EST 2010

OSTI ID:988978

Lu, Wei-Yang; Song, Bo; Antoun, Bonnie R; Connelly, Kevin; Korellis, John S

Investigation of damage and failure of materials under impact loading relies on reliable dynamic tensile experiments. A precise Kolsky tension bar is highly desirable. Based on the template of the Kolsky compression bar that we recently developed and presented at 2009 SEM conference, a new Kolsky tension bar apparatus was completed at Sandia National Laboratories, California. It is secured to the same optical table. Linear bearings with interior Frelon coating were employed to support the whole tension bar system including the bars and gun barrel. The same laser based alignment system was used to efficiently facilitate highly precise alignment of the bar system. However, the gun part was completely re-designed. One end of the gun barrel, as a part of loading device, was directly jointed to the bar system. A solid cylindrical striker is launched inside the gun barrel and then impacts on a flange attached to the other end of the gun barrel to facilitate a sudden tensile loading on the whole system. This design improves the quality of impact to easily produce a perfect stress wave and is convenient to utilize pulse shaping technique. A calibration and dynamic characterization of an aluminum specimen are presented.

• Research Organization: Sandia National Laboratories
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 988978
• Report Number(s): SAND2010-1485C
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALIGNMENT
ALUMINIUM
BEARINGS
CALIBRATION
COATINGS
COMPRESSION
DESIGN
FLANGES
LASERS
SANDIA NATIONAL LABORATORIES