Developments in Polymer Fracture, Volume 1E. H. Andrews |
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Page 59
... crack advance in chain scission ESC are not obvious . One might postulate a mechanism of sequential attack and rupture of the most highly stressed covalent bonds at the surface of the crack tip , but even in the case of ozone cracking ...
... crack advance in chain scission ESC are not obvious . One might postulate a mechanism of sequential attack and rupture of the most highly stressed covalent bonds at the surface of the crack tip , but even in the case of ozone cracking ...
Page 79
... tip to finite values . values . Indeed , eqn . ( 19b ) [ ƒr / 2 AS ( ẞ ... crack if the spring constant of the fibrils is set equal to zero ; surely ... crack tips may be modelled easily using the Muskhelishvili formalism developed above ...
... tip to finite values . values . Indeed , eqn . ( 19b ) [ ƒr / 2 AS ( ẞ ... crack if the spring constant of the fibrils is set equal to zero ; surely ... crack tips may be modelled easily using the Muskhelishvili formalism developed above ...
Page 84
... crack tip ( mm ) x - 00 , distance from crack tip ( mm ) FIG . 9. ( a ) Surface stress profile for a methanol craze in PMMA from the w ( x ) profile using the Fourier transform method . ( b ) Stress profile along a line parallel to the ...
... crack tip ( mm ) x - 00 , distance from crack tip ( mm ) FIG . 9. ( a ) Surface stress profile for a methanol craze in PMMA from the w ( x ) profile using the Fourier transform method . ( b ) Stress profile along a line parallel to the ...
Contents
Molecular Fracture | 17 |
Environmental Cracking of Polymers | 55 |
Impact Performance of Polymers | 121 |
Copyright | |
6 other sections not shown
Common terms and phrases
air craze applied stress behaviour bond brittle chain direction constant crack growth crack propagation crack tip crack velocity craze fibrils craze surface craze tip cross-linked curve cycles damage zone decrease delamination denture-base acrylic diacetylene displacement effect elastic elastomers electron environment environmental craze epoxy resins experimental failure modes fibres fibrils fracture mechanics fracture surface fracture toughness glass glass/epoxy impact strength impact tests increase K₁ laminates linear-elastic macroscopic materials matrix measured methanol modulus molecular fracture molecular weight molecules observed obtained occurs orientation parameter Phys plastic deformation plasticised plies PMMA poly(methylmethacrylate polyethylene polymer crystals Polymer Sci polymeric predicted radical concentration residual strength rubber semicrystalline semicrystalline polymers shear shown in Fig single crystals solid specimen static stick-slip stiffness strain rate stress intensity factor structure studies surface stress temperature tensile strength tensile stress test-piece thermoplastics thermosetting thickness tion unnotched Young's modulus