STP1003

    A Test Method to Measure the Response of Composite Materials Under Reversed Cyclic Loads

    Published: Jan 1989


      Format Pages Price  
    PDF (368K) 14 $25   ADD TO CART
    Complete Source PDF (6.6M) 14 $59   ADD TO CART


    Abstract

    A test method to measure the response of composite materials under reversed cyclic loads is described. The method approximates the long-term response of a component by permitting the composite specimen to respond to the imposed loads and fail in an unconstrained mode rather than in a constrained mode. The method has been successfully used for the reversed cyclic loading of unnotched and notched graphite/epoxy and graphite/PEEK laminates of various stacking sequences. Included in the paper are monotonic tensile and compressive stiffness and strength data at several points in the fatigue lifetime and damage development information obtained via X-ray radiography for quasi-isotropic T300/5208 and AS4/PEEK laminates with unloaded circular holes.

    Keywords:

    composite materials, test methods, compression, graphite/epoxy, graphite/PEEK, damage, fatigue, stiffness, strength, life


    Author Information:

    Bakis, CE
    Research associate, instructor, and professor, Virginia Polytechnic Institute and State University, Blacksburg, VA

    Simonds, RA
    Research associate, instructor, and professor, Virginia Polytechnic Institute and State University, Blacksburg, VA

    Stinchcomb, WW
    Research associate, instructor, and professor, Virginia Polytechnic Institute and State University, Blacksburg, VA


    Paper ID: STP10026S

    Committee/Subcommittee: D30.04

    DOI: 10.1520/STP10026S


    CrossRef ASTM International is a member of CrossRef.