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Walter, Mats
Publikasjoner (4 av 4) Visa alla publikasjoner
Kao-Walter, S., Walter, M., Dasari, A. & Leon, A. (2011). Tearing and Delaminating of a Polymer Laminate. Key Engineering Materials, 465, 169-174
Åpne denne publikasjonen i ny fane eller vindu >>Tearing and Delaminating of a Polymer Laminate
2011 (engelsk)Inngår i: Key Engineering Materials, ISSN 1013-9826, Vol. 465, s. 169-174Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The fracture behaviour of laminated materials was studied in this work. The materials used in this work were low-density polyethylene (LDPE) laminated on polyethylene (PET). The thickness of the LDPE was 27 μm and the PET was 100 μm. Experiments were performed by using a 2-leg trousers specimen to analyse the tearing behaviour of the laminate in relation to the delamination. A clear delamination zone was observed during the crack propagation by tearing. Furthermore, a finite element calculation was performed to simulate the behavior around the crack tip during the tearing. A correlation between adhesion and crack propagation was discussed. Finally, the theory of Essential Work of Fracture (EWF) was used for predicting the specific total work of fracture along the tear path across the plastic zones.

sted, utgiver, år, opplag, sider
@scientific.net, 2011
Emneord
Tearing, laminate, delaminate, Essential Work of Fracture, 2-leg trousers.
HSV kategori
Identifikatorer
urn:nbn:se:bth-7662 (URN)10.4028/www.scientific.net/KEM.465.169 (DOI)000291704700036 ()oai:bth.se:forskinfo5D1ABE8B3B9B4E42C1257807004FA2D0 (Lokal ID)oai:bth.se:forskinfo5D1ABE8B3B9B4E42C1257807004FA2D0 (Arkivnummer)oai:bth.se:forskinfo5D1ABE8B3B9B4E42C1257807004FA2D0 (OAI)
Tilgjengelig fra: 2012-09-18 Laget: 2010-12-28 Sist oppdatert: 2020-02-25bibliografisk kontrollert
Kao-Walter, S., Hu, M., Walter, M. & Leon, A. (2009). A Comparison of 2-zone and 3-zone Models in Tearing based on Essential Work of Fracture. In: : . Paper presented at 12th Int. Conference on Fracture. Ottawa: Natural resources Canada
Åpne denne publikasjonen i ny fane eller vindu >>A Comparison of 2-zone and 3-zone Models in Tearing based on Essential Work of Fracture
2009 (engelsk)Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Two different models (2-zone and 3-zone) for describing the deformation and fracture behavior of tearing ligament was compared and discussed based on the experimental results made by Kim et al. The models are based on the Essential Work of Fracture approach for predicting the specific total work of fracture along the tear path across plastic zones. The experiment and analysis were based on 2-leg trousers tear specimen. The materials chosen in this work were PET (0.508 mm). The results showed that the accuracy of 3-zone model was higher than 2-zone model. It was found that this difference is because the 2-zone model did not consider the plastic deformation caused by loading prior to tearing. Also a finite element model was created to simulate the behavior around the crack tip.

sted, utgiver, år, opplag, sider
Ottawa: Natural resources Canada, 2009
Emneord
tearing, Essential Work of Fracture, plastic zones
HSV kategori
Identifikatorer
urn:nbn:se:bth-7668 (URN)oai:bth.se:forskinfo8432544A6C716AD5C1257807003DEFD4 (Lokal ID)oai:bth.se:forskinfo8432544A6C716AD5C1257807003DEFD4 (Arkivnummer)oai:bth.se:forskinfo8432544A6C716AD5C1257807003DEFD4 (OAI)
Konferanse
12th Int. Conference on Fracture
Tilgjengelig fra: 2012-09-18 Laget: 2010-12-28 Sist oppdatert: 2017-03-16bibliografisk kontrollert
Kao-Walter, S., Levin, M., Petronyuk, J. & Walter, M. (2008). Acoustic imaging internal microstructure of a packaging material. Paper presented at XV Int. conf. on Mech. Of Comp. Mat., Riga. Paper presented at XV Int. conf. on Mech. Of Comp. Mat., Riga. Riga
Åpne denne publikasjonen i ny fane eller vindu >>Acoustic imaging internal microstructure of a packaging material
2008 (engelsk)Konferansepaper, Publicerat paper (Fagfellevurdert) Published
Abstract [en]

Microstructure of a paper-based packaging material was studied by acoustic microscopy method. The laminate structure of the packaging material contains paperboard, polymer and aluminium, which are widely used for aseptic liquid food package. The method has also been used to detect delaminations inside the material. The results show the possibility to study the micro structural features of paperboard, polymer and aluminium foil layered materials by applying the high-resolution ultrasonic acoustic microscopy. The potential for visualization defects in the body of this kind of materials is discussed in order to further develop the Non-Destructive Testing (NDT) method in food packaging industries.

sted, utgiver, år, opplag, sider
Riga: , 2008
Emneord
acoustic microscopy, laminate, packaging, delamination.
HSV kategori
Identifikatorer
urn:nbn:se:bth-8292 (URN)oai:bth.se:forskinfo24B22F51F90C7B2DC1257520004EA055 (Lokal ID)oai:bth.se:forskinfo24B22F51F90C7B2DC1257520004EA055 (Arkivnummer)oai:bth.se:forskinfo24B22F51F90C7B2DC1257520004EA055 (OAI)
Konferanse
XV Int. conf. on Mech. Of Comp. Mat., Riga
Tilgjengelig fra: 2012-09-18 Laget: 2008-12-15 Sist oppdatert: 2015-06-30bibliografisk kontrollert
Kao-Walter, S., Walter, M. & Muhammadi, A. (2007). Tensile and Tearing Fracture Behaviour of Food Packaging Laminate. Paper presented at the 3rd CHINA-EUROPE Symposium on PROCESSING AND PROPERTIES OF REINFORCED Polymers, Budapest, Hungary. Paper presented at the 3rd CHINA-EUROPE Symposium on PROCESSING AND PROPERTIES OF REINFORCED Polymers, Budapest, Hungary. Budapest
Åpne denne publikasjonen i ny fane eller vindu >>Tensile and Tearing Fracture Behaviour of Food Packaging Laminate
2007 (engelsk)Konferansepaper, Publicerat paper (Annet vitenskapelig) Published
Abstract [en]

Fracture behaviour of laminated food packaging materials is studied. The materials used in this work were the single layer of Aluminium foil (Al-foil), Low density polyethylene (LDPE) and the lamination of these single layers. Experiments were performed by applying the centred crack specimen as well as the 2-leg trousers specimen. It was observed that the load carrying capacity increased for the tensile and decreased for the tearing specimen when the two layers are laminated together. It was also found that in the case of tearing the crack growth was not only initiated by shear stress but also by normal stress. A modified strip yield model and the essential work of fracture theory were used to analyze the deformation and the fracture behaviour. The initial crack growth of the single layers and the laminate during the tensile and tearing were compared and investigated.

sted, utgiver, år, opplag, sider
Budapest: , 2007
HSV kategori
Identifikatorer
urn:nbn:se:bth-8288 (URN)oai:bth.se:forskinfoCC5B476C0AD0D81EC125752000500CD6 (Lokal ID)oai:bth.se:forskinfoCC5B476C0AD0D81EC125752000500CD6 (Arkivnummer)oai:bth.se:forskinfoCC5B476C0AD0D81EC125752000500CD6 (OAI)
Konferanse
the 3rd CHINA-EUROPE Symposium on PROCESSING AND PROPERTIES OF REINFORCED Polymers, Budapest, Hungary
Tilgjengelig fra: 2012-09-18 Laget: 2008-12-15 Sist oppdatert: 2015-06-30bibliografisk kontrollert
Organisasjoner