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Application of essential work of fracture concept to toughness characterization of high‐density polyethylene
Author(s) -
Kwon H.J.,
Jar P.Y.B.
Publication year - 2007
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20814
Subject(s) - necking , materials science , high density polyethylene , fracture toughness , composite material , deformation (meteorology) , ultimate tensile strength , toughness , tensile testing , polyethylene , fracture (geology) , characterization (materials science) , plane stress , stress (linguistics) , work (physics) , structural engineering , finite element method , mechanical engineering , linguistics , philosophy , engineering , nanotechnology
Deformation and fracture toughness of high‐density polyethylene (HDPE) in plane‐stress tension was studied using the concept of essential work of fracture (EWF). Strain range for necking was determined from uniaxial tensile test, and was used to explain the deformation transition for 2‐staged crack growth in double‐edge‐notched tensile test. Through work‐partitioning, EWF values for HDPE were determined for each stage of the crack growth. Appropriateness of these EWF values to represent the material toughness is discussed. The study concludes that the EWF values for ductile polymers like HDPE may not be constant, but vary with the deformation behaviour involved in the crack growth process. POLYM. ENG. SCI., 47:1327–1337, 2007. © 2007 Society of Plastics Engineers