To access the full text documents, please follow this link:

Ductile tearing of polymer films
Delgado Rangel, José Alejandro
Martínez Benasat, Antonio; Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal•lúrgica
As polymers are made from long macromolecular chains, their deformation mechanismsare related with the sliding between these chains as threads in a cloth, this can be a littleexplanation of tearing. Now then, if during the load application the component is inyielding and it has a stress concentrator, as a crack may be, this sliding occurs in a stablemanner and the stable crack growth is shown. In this work, complete-fracture crack testswhere carried out for an Ethylene-Propylene Block Copolymer film prepared on DDENTspecimens with two sharpening methods; by razor blade and by femtolaser beam. TheLoad-Displacement plots and the ligament length evolution for all specimens wererecorded using a Digital Image Correlation System to approach the complete crackbehavior, describing the EWF conventional method in the crack extension process. Themain results of this work aim to say that the initiation of crack propagation occurs whenthe area under the load-displacement curve reaches the we value. This start ofpropagation shall be given by the material as a function of the initial crack conditions.
Àrees temàtiques de la UPC::Enginyeria dels materials::Assaig de materials::Assaig de fractura
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
Polymers -- Deterioration
Thin films
Polímers -- Deterioració
Pel·lícules fines
Restricted access - author's decision
Research/Master Thesis
Universitat Politècnica de Catalunya

Show full item record

Related documents

Other documents of the same author

Madroñal, N.; Lopez-Aracil, C.; Rangel, A.; Río Fernández, José Antonio del; Delgado-Garcia, J.M.; Gruart, A.
Rangel Rincones, Alejandra Helena; Madronal, Noelia; Gruart i Massó, Agnès; Gavín Marín, Rosalina; Llorens, Franc; Sumoy, Lauro; Torres, Juan María; Delgado-García, José María; Río Fernández, José Antonio del