TY - JOUR A1 - Brunner, A. J. A1 - Bohse, Jürgen T1 - Acoustic emission standards and guidelines 2002 - a comparative assessment and perspectives N2 - A comparative analysis of selected standards and guidelines on Acoustic Emission testing published by international and national organisations yields an assessment of the current status of standardisation. Areas where existing documents do not yet exist or appear unsatifactory for some reason are identified and formulated as perspectives for further work. In the future, structural integrity assessment with Acoustic Emission methods is expected to gain in importance. PY - 2002 UR - http://www.ndt.net/article/v07n09/21/21.htm SN - 1435-4934 VL - 7 IS - 9 SP - 1 EP - 10 PB - NDT.net CY - Kirchwald AN - OPUS4-1792 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bohse, Jürgen T1 - Acoustic emission characteristics of micro-failure processes in polymer blends and composites N2 - Acoustic emission (AE) characteristics of micro-failure processes in HDPE/PP blends with and without compatibilizer, single-fibre composites (glass/epoxy, carbon/epoxy, glass/polycarbonate) and unidirectionally reinforced multi-fibre composites (glass/polypropylene) were studied. For blends, the number and the elastic fracture energy release of micro-failure processes are theoretically approximated and correlated with the number of AE signals and the AE energy. A qualitative correlation of the mechanical energy released from fibre/matrix debonding and fibre-fracture processes in single-fibre pull-out experiments with the measured AE energy is demonstrated. For the single-fibre fragmentation of glass fibres and carbon fibres, a quantitative approximation of the AE amplitudes at locations of the fragmentation sources is achieved. A new method for the selection of single transient acoustic emissions and the classification of failure mechanisms in composites is introduced. Selected emissions are classified into matrix cracking, fibre breakage and interface processes (fibre/matrix debonding or fibre pull-out) from their total power in defined frequency intervals of the spectral power density. A fracture-mechanics investigation of the delamination behaviour of unidirectional composites accompanied by AE examinations is discussed. The extension of the damage zone around the crack tip is quantified by the location of AE events and compared with the theoretically approximated dimensions. The size of the damage zone is used for theoretical calculations of the mechanical energy release from micro-failure processes. A correlation of the AE energy-release rates with the mechanical energy-release rates from participated failure mechanisms like matrix cacking, fibre/matrix debonding and fibre breakage is presented. KW - Polymer blends KW - Polymer-matrix composites KW - Fracture toughness KW - Delamination KW - Acoustic emission PY - 2000 U6 - https://doi.org/10.1016/S0266-3538(00)00060-9 SN - 0266-3538 VL - 60 SP - 1213 EP - 1226 PB - Elsevier CY - Barking AN - OPUS4-4155 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bohse, Jürgen A1 - Chen, J.H. T1 - Acousitc Emission Examination of Mode I, Mode II and Mixed-Mode I/II Interlaminar Fracture of Unidirectional Fiber-Reinforced Polymers PY - 2001 SN - 0730-0050 VL - 19 SP - 1 EP - 10 PB - Acoustic Emission Group CY - Los Angeles, Calif. AN - OPUS4-4157 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bohse, Jürgen T1 - Acoustic emission examination of polymer-matrix composites PY - 2004 SN - 0730-0050 VL - 22 SP - 208 EP - 223 PB - Acoustic Emission Group CY - Los Angeles, Calif. AN - OPUS4-6944 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wachsmuth, Janne A1 - Malikoutsakis, M. A1 - Savaidis, G. A1 - Savaidis, A. A1 - Bohse, Jürgen T1 - Corrosion and fatigue crack monitoring by means of acoustic emission for application in transportation means KW - Acoustic emission KW - Health monitoring KW - Fatigue crack growth KW - Corrosion KW - Finite elements KW - Welds PY - 2012 SN - 1943-3514 VL - 5 IS - 1 SP - 9 EP - 17 PB - Global Scientech CY - Basking Ridge, NJ, USA AN - OPUS4-27610 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Jagenbrein, A. A1 - Tscheliesnig, P. A1 - Wachsmuth, Janne A1 - Bohse, Jürgen T1 - Detection of corrosion processes and fatigue cracks by means of acoustic emission monitoring KW - Acoustic emission monitoring KW - Corrosion processes KW - Fatigue cracks KW - Background noise KW - Signal classification KW - Transport products PY - 2012 SN - 0025-5300 VL - 54 IS - 11-12 SP - 769 EP - 778 PB - Hanser CY - München AN - OPUS4-27061 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -