Archives

Modeling and Study of Fracture and Delamination in a Packaging Laminate

ABSTRACT In this work, a packaging laminate consisting of LDPE (Low Density Polyethylene), Al-foil (Aluminum foil) is focused, and failure due to necking in substrates and interfacial delamination under loading are considered. A coupled elasto-plasticity damage and fracture constitutive model is combined. The proposed constitutive model is incorporated into the FEM code ABAQUS and utilized […]

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Study of Ligament Length Effect on Mode Mix of a Modified In-Plane Shear Test Specimen

ABSTRACT Shear fracture toughness is an important material behavior that needs to be determined and considered in many industrial fields. At the same time, shear testing is one of the complex material testing areas where available methods are few, often need special arrangements, and most of the methods do not strictly satisfy the definition of […]

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Study of Shear Dominant Delamination in Thin Brittle-High Ductile Interface

ABSTRACT Thin laminates of Aluminum (Al) foil and Low Density Polyethylene (LDPE) film are essential constituents of food packages where these two substrates are bonded together with a thin layer of LDPE acting as adhesive. Noticeably, Al is a low ductile/quasi brittle material, whereas LDPE is highly ductile. The mechanism of delamination and strength of […]

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Powerful Modelling Techniques in ABAQUS to Simulate Failure of Laminated composites

ABSTRACT In this study, laminated composites consisting of LDPE (Low Density Polyethylene), Al-foil (Aluminum foil)and an adhesive interface layer is focused. The defects like necking in LDPE, Al-foil layer and interfacial delamination can significantly impact the loading capacity of the laminated material. However, the influence mechanisms of the defects are still unclear, and no appropriate […]

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Presentations in “Applied Solid Mechanics”

On March 3rd 2016, six teams of mechanical engineering students presented their projects within the course “Applied Solid Mechanics”. In this course, students have learned how to find appropriate dimensions and loading of constructions that are affected by fatigue stresses or are joined by welds, and also how to choose safety values by considering the […]

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Besök vid Volvo Car Body Components

I samband med Institutionen för Maskintekniks (TIMA) sista personalmöte för året genomfördes ett studiebesök vid Volvo Car Body Components i Olofström. Dr. Mats Sigvant, teknisk expert inom plåtformning, hälsade oss välkomna och beskrev utvecklingen från bysmedja år 1735 till dagens avancerade och omfattande pressning av karossdetaljer samt framtagning av pressverktyg. Volvo Car Body Components levererar […]

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Bra uppslutning till B. Brobergs symposium 24-25 augusti

Forskare från hela världen samlades på BTH under två dagar för att genom “5th B.Broberg Symposium on Mechanics of Materials” hedra minnet av den svenske forskaren och professorn Bertram Broberg (1925-2005). Symposiet arrangeras vartannat år växelvis i Sverige eller på Irland, där Bertram Broberg från år 1991 var professor emeritus vid University College of Dublin. […]

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