STP1092

    Fatigue and Fracture Testing Using a Multitasking Minicomputer Workstation

    Published: Jan 1990


      Format Pages Price  
    PDF (360K) 16 $25   ADD TO CART
    Complete Source PDF (5.1M) 16 $80   ADD TO CART


    Abstract

    An automated fatigue and fracture toughness testing control system is described that is based on a Sun 3/180 workstation computer running under the UNIX operating system. Real-time difficulties associated with UNIX have been overcome with a unique combination of software and modified data acquisition hardware that results in a system not requiring conventional analog-to-digital (A/D) and digital-to-analog (D/A) device drivers. The control system software subroutines utilize the multitasking feature of UNIX to permit plotting, computations, and A/D operations to run simultaneously with D/A output. Inputs to the system are primarily through a mouse-driven, menu-based window methodology. The program currently contains four versatile cyclic loading sequences for fatigue crack growth and LEFM and EPFM fracture evaluations that can be applied to five commonly utilized specimen geometries. The software and hardware system has been demonstrated and validated for numerous tests using various materials and specimen types.

    Keywords:

    automated materials testing, real-time control, fatigue (materials), fracture toughness, data acquisition system, computer control, automatic test control, test equipment, automation, fatigue testing, fracture testing


    Author Information:

    McKeighan, PC
    Graduate research assistant, research engineer, and professor, School of Mechanical Engineering, Purdue University, West Lafayette, IN

    Evans, RD
    Graduate research assistant, research engineer, and professor, School of Mechanical Engineering, Purdue University, West Lafayette, IN

    Hillberry, BM
    Graduate research assistant, research engineer, and professor, School of Mechanical Engineering, Purdue University, West Lafayette, IN


    Paper ID: STP25030S

    Committee/Subcommittee: E08.03

    DOI: 10.1520/STP25030S


    CrossRef ASTM International is a member of CrossRef.