Reliability studies of materials using several LSI-11 based systems

Conference · Thu Apr 02 04:00:00 EST 1981

OSTI ID:6506330

Gertz, K A

Valid predictions about the reliability of materials require tests on a large number of samples. The materials must undergo a number of different types of load histories in order to make an accurate definition of the damage function. At LLNL, a test facility was designed that allows material testing of strength and life to be done at the different load histories. The facility uses several LSI-11 microcomputers as multichannel data acquisition systems. Currently, each system operates independently using floppy disks as program and data storage. The floppy disks containing the data are hand carried to a PDP-11/60 minicomputer for data analysis. Each system uses an analog-to-digital (A/D) converter selected to best fit the characteristics of the signal being measured; i.e., a high-speed direct memory access (DMA) A/D for signals with fast rise times, an integrating A/D for signals with an ac component, etc. How the Mechanics of Materials Test Facility is implemented is described.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6506330
• Report Number(s): UCRL-85254; CONF-810546-1
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420500* -- Engineering-- Materials Testing
COMPUTERS
DATA ACQUISITION SYSTEMS
DATA ANALYSIS
DESIGN
ELECTRONIC CIRCUITS
FATIGUE
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
OPERATION
RELIABILITY
TEST FACILITIES
TESTING