Facilities, testing, and continuing studies on carbon-black loaded styrene-butadiene rubber

Technical Report · Thu Sep 15 00:00:00 EDT 1988

OSTI ID:6724857

Goldberg, A; Sanchez, R J; LeMay, J D; Patt, J

The Lawrence Livermore National Laboratory (LLNL) has been involved with investigations dealing with the response of the rubber in tank track pads to various loading scenarios, both in the field and in the laboratory. In the laboratory, numerous studies were also performed on a number of other rubber formulations primarily involving a range of carbon-black loadings in SBR and NR. Reference is made to reports and papers addressing each of the studies involved in this program. Work performed during the final stages of this program is described. These studies were directed primarily at developing an understanding of the effects of cycling and notching histories, notch radius, notch depth, and specimen thickness on the deformation behavior, strain distributions, hysteresis, and residual strength of SBR containing various amounts of carbon black. Significant improvements were realized in our testing methodology, computer-controlled facilities, and data-acquisition system, and in our ability to obtain continuous photomicrographic documentation in ''real time'' of the tearing improvements, as they relate to the various studies, are detailed in this document. Results obtained in these studied involve (1) the fabrication and testing of thick tensile specimens, (2) the effect of notching under load on the residual strength, (3) the effect of cycling on residual strength of notched and notch-free specimens, (4) the effect of cycling on hysteresis, (5) the effect of notch radius for various notch depths on loss of strength, and (6) evaluation of strain at a notch tip and remote from the notch tip at various specimen extensions by analyzing the specimen grid markings, which were obtained with the microscope-video-Polaroid system. 15 refs., 27 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6724857
• Report Number(s): UCID-21504; ON: DE89001858
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BUTADIENE
MATERIALS TESTING
CARBON BLACK
MILITARY EQUIPMENT
OPTIMIZATION
NATURAL RUBBER
RUBBERS
STYRENE
DEFORMATION
FINITE ELEMENT METHOD
HYSTERESIS
NOTCHES
STRAINS
TENSILE PROPERTIES
ALKYLATED AROMATICS
AROMATICS
CARBON
DIENES
ELASTOMERS
ELEMENTS
EQUIPMENT
HYDROCARBONS
MECHANICAL PROPERTIES
NONMETALS
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYENES
POLYMERS
TESTING
360603* - Materials- Properties