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Congratulations Eskil Andreasson, Doctor of Philosophy!

Eskil Andreasson successfully defended his PhD thesis “Mechanics and Failure in Thin Material Layers –  Towards Realistic Package Opening Simulation” in front of a full house and grading committee, and after thorough questioning by the opponent Gabriella Bolzon (Politecnic University of Milan, Italy) Abstract The final goal of this PhD-work is an efficient and user-friendly […]

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Model-driven value assessment: a case from the food packaging industry

ABSTRACT Consumer perception of food packaging solutions is driven by early design decisions on paperboard configuration and manufacturing technologies. Simulation Driven Design is common to frontload design activities, but is confined to the engineering field and fails to capture higher-level value aspects. This paper presents an assessment framework connecting customer value dimensions with simulations conducted […]

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BTH-forskare i Kina för att diskutera hållbar produktion

En delegation bestående av forskare från bland annat BTH, Lunds universitet, Swerea IVF, Tetra Pak och Volvo Cars har diskuterat hållbar materialformning och dess tillämpningar inom bil- och förpackningsindustrin vid ett veckolångt besök i Kina. Symposiet arrangerades av BTH, Shanghai Polytechnic University och Kunming University of Science and Technology.

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Experimental and numerical assessment of the work of fracture in injection-moulded low-density polyethylene

ABSTRACT The fracture mechanics properties of injection-moulded low-density polyethylene (LDPE) sheets were investigated both experimentally and numerically. The total work of fracture was determined experimentally, by means of fracture mechanics testing of sheets of injection-moulded LDPE with side cracks of different lengths. A multi-specimen method, proposed by Kim and Joe (1987), was employed. The total […]

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Extreme Product-Service Innovation 2017/18 completed

In the Extreme PSS Innovation course, students from BTH’s masters programmes in Mechanical Engineering, Industrial Management and Engineering, and Sustainable Product-Service System Innovation (MSPI) are given challenges from real industrial companies to solve. The course is a central part of BTH’s mantra “In Real Life”. 

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Anisotropic Elastic-Viscoplastic Properties at Finite Strains of Injection-Moulded Low-Density Polyethylene

ABSTRACT Injection-moulding is one of the most common manufacturing processes used for polymers. In many applications, the mechanical properties of the product is of great importance. Injection-moulding of thin-walled polymer products tends to leave the polymer structure in a state where the mechanical properties are anisotropic, due to alignment of polymer chains along the melt […]

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Simulation of thin aluminium-foil in the packaging industry

ABSTRACT This work present an approach of how to account for the anisotropic mechanical material behaviour in the simulation models of the thin aluminium foil layer (≈10 μm) used in the Packaging Industry. Furthermore, the experimental results from uniaxial tensile tests are parameterised into an analytical expression and the slope of the hardening subsequently extended […]

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Ab initio and classical atomistic modelling of structure and defects in crystalline orthorhombic polyethylene: Twin boundaries, slip interfaces, and nature of barriers

ABSTRACT We study the stability of twin boundaries and slip in crystalline orthorhombic polyethylene by means of density functional theory (DFT), using a nonempirical, truly nonlocal density function, and by means of classical molecular dynamics (MD). The results show that, in accordance with experimental observations, there is a clear preference to chain slip over transverse […]

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Realistic Package Opening Simulations : An Experimental Mechanics and Physics Based Approach

Licentiate thesis of Eskil Andreasson, presented at BTH 2015-05-08.. Abstract A finite element modeling strategy targeting package opening simulations is the final goal with this work. The developed simulation model will be used to proactively predict the opening compatibility early in the development process of a new opening device and/or a new packaging material. To […]

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