XIAO Wenkang, ZHANG Chunyu. THE DEGRADATION OF THE ELASTIC PROPERTIES OF METALLIC MATERIALS EVALUATED BASED ON AN EXTENDED GTN MODEL[J]. MECHANICS IN ENGINEERING, 2016, 38(2): 153-157. DOI: 10.6052/1000-0879-15-235
Citation: XIAO Wenkang, ZHANG Chunyu. THE DEGRADATION OF THE ELASTIC PROPERTIES OF METALLIC MATERIALS EVALUATED BASED ON AN EXTENDED GTN MODEL[J]. MECHANICS IN ENGINEERING, 2016, 38(2): 153-157. DOI: 10.6052/1000-0879-15-235

THE DEGRADATION OF THE ELASTIC PROPERTIES OF METALLIC MATERIALS EVALUATED BASED ON AN EXTENDED GTN MODEL

  • Although an indentation does not induce apparent cracking in ductile materials, the degradation of the elastic stiffness of ductile metals does occur in micro-/macro-indentation tests. After comparing the degradation predicted based on extended damaged-plasticity models with that measured by experimental testing, it is found that the softening due to the distortion of the existing voids is not enough to cause a notable degradation of elasticity. It is suggested that an independent damage-nucleation mechanism due to the shear deformation may be in operation. Although attractive in practical applications for its nondestructive nature, the damage-based indentation technique for estimating the fracture properties of ductile materials needs further investigations.
  • loading

Catalog

    Turn off MathJax
    Article Contents

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return