Helmut Klocker - Academia.edu (original) (raw)
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Papers by Helmut Klocker
Advanced Engineering Materials, 2001
Applied Mechanics and Materials, 2010
13th International Conference on Aluminum Alloys, 2012
Abstract Bendability is a key property of aluminum automotive panels. Previous work showed that t... more Abstract Bendability is a key property of aluminum automotive panels. Previous work showed that the bendability may not be characterized by macroscopic parameters. In the present work, the kinetics of damage development during bending of 6016 sheet was first ...
Materials Science and Engineering: A, 2013
Journal of Materials Processing Technology, 2010
Journal of Materials Processing Technology, 2008
The growth and coalescence of voids nucleated by decohesion or cracking of second phase particles... more The growth and coalescence of voids nucleated by decohesion or cracking of second phase particles is a common damage process for many metallic alloys. Classical damage models, based on void growth and coalescence, predict a ductility increase if the stress triaxiality is ...
Applied Mechanics and Materials, 2010
This paper describes an innovative way to characterize the strength of spot welds. A wedge test h... more This paper describes an innovative way to characterize the strength of spot welds. A wedge test has been developed to generate interfacial failures in weldments and observe in-situ the crack propagation. An energy analysis quantifies the spot weld crack resistance. Finite Element calculations investigate the stresses and strains along the crack front. A comparison of the local loading state with experimentally observed crack fronts provides the necessary data for a failure criterion in spot weld fusion zones. The method is applied to spot welds of Advanced High Strength steels.
Advanced Engineering Materials, 2010
Advanced Engineering Materials, 2001
Applied Mechanics and Materials, 2010
13th International Conference on Aluminum Alloys, 2012
Abstract Bendability is a key property of aluminum automotive panels. Previous work showed that t... more Abstract Bendability is a key property of aluminum automotive panels. Previous work showed that the bendability may not be characterized by macroscopic parameters. In the present work, the kinetics of damage development during bending of 6016 sheet was first ...
Materials Science and Engineering: A, 2013
Journal of Materials Processing Technology, 2010
Journal of Materials Processing Technology, 2008
The growth and coalescence of voids nucleated by decohesion or cracking of second phase particles... more The growth and coalescence of voids nucleated by decohesion or cracking of second phase particles is a common damage process for many metallic alloys. Classical damage models, based on void growth and coalescence, predict a ductility increase if the stress triaxiality is ...
Applied Mechanics and Materials, 2010
This paper describes an innovative way to characterize the strength of spot welds. A wedge test h... more This paper describes an innovative way to characterize the strength of spot welds. A wedge test has been developed to generate interfacial failures in weldments and observe in-situ the crack propagation. An energy analysis quantifies the spot weld crack resistance. Finite Element calculations investigate the stresses and strains along the crack front. A comparison of the local loading state with experimentally observed crack fronts provides the necessary data for a failure criterion in spot weld fusion zones. The method is applied to spot welds of Advanced High Strength steels.
Advanced Engineering Materials, 2010