Authors
|
Dollhofer, J. ; Beckert, W. ; Lauke, B. ; Schneider, K.
|
Title
|
Fracture mechanics characterization of mixed-mode toughness of thermoplast/glass interfaces (brittle/ductile interfacial mixed-mode fracture)
|
Date
|
31.12.2001
|
Number
|
10323
|
Abstract
|
Interfacial toughness is enhanced when the mode-mixity of the biaxial near-tip stress state approaches mode II. Conversely, when the near-tip mode-mixity is close to pure mode I, the interfacial toughness curve exhibits a minimum. This toughness minimum is believed to represent the so-called intrinsic adhesion. Within linear elasticity, the biaxial, singular near-tip solution for an open interface crack may be employed for characterizing the local stress state as long as non-linearities due to crack-wall contact and plastic flow are contained within a length scale small enough compared to the extension of the near-tip opening-dominated fields. In the present work, the interfacial mixed-mode fracture toughness curve was determined for a polyethylene/glass compound. Subsequent to the reduction of experimental data based on the linear-elastic crack model, the applicability of linearelastic fracture mechanics is verified by comparing the estimated extension of the plastic zones to the extension of the <I>K</I>-dominance zone. It is found that within the mixed-mode range accessible to linear-elastic fracture mechanics the apparent interfacial fracture toughness varies by about an order of magnitude.
|
Publisher
|
Journal of Adhesion Science and Technology
|
Wikidata
|
|
Citation
|
Journal of Adhesion Science and Technology 15 (2001) 1559-1587
|
DOI
|
https://doi.org/10.1163/156856101753207689
|
Tags
|
|