TY - CONF A1 - Widjaja, Martinus Putra A1 - Moosavi, Robabeh A1 - John, Sebastian A1 - Schumacher, David A1 - Grunwald, Marcel A1 - Auster, Jürgen A1 - Szczepaniak, Marius A1 - Mair, Georg A1 - Waske, Anja T1 - Impact damage evaluation of hydrogen composite pressure vessels by analysing computed tomography images N2 - The objective of this work is to find a method that describes the degree of damage from an impact experiment. This experiment was performed on Composite Pressure Vessels (CPV) in order to find the correlation of impact damage to the residual burst pressure. Computed Tomography (CT) approach was used to capture the before and after impact condition of the CPVs. The Wasserstein function was used to calculate how much the after impact image has differed from the original one. In the end, a good correlation was obtained to the residual burst pressure. T2 - HyFiSyn Conference CY - Online meeting DA - 15.09.2021 KW - Hydrogen KW - Composite pressure vessel KW - Carbon fibre KW - Burst test KW - Image analysis KW - Computed tomography (CT) PY - 2021 SP - 31 EP - 32 AN - OPUS4-53494 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Widjaja, Martinus Putra A1 - Joannes, Sebastien A1 - Bunsell, Anthony A1 - Mair, Georg A1 - Thionnet, Alain T1 - Accumulation of Fibre Breaks under Time Dependent Loads in CFRP Materials of Pressure Vessels N2 - BAM has discovered that the reliability of tested composite pressure vessel will be altered when the loading speed is varied. The ageing of composite materials in general gives negative effect to the structure, however there might be positive effect occurs due to the load redistribution between the fibres. The study on the negative effect of ageing has been compared favourably with the fibre break model from Mines ParisTech. To improve the model's capability, this positive effect should also be implemented. The problem however to evaluate real scale model that might take extensive computation time. The reduced volume method then was proposed to improve the calculation time. The next study is then to check the approach on different loading condition and compare the result with experimental data provided by BAM. T2 - PhD Day 2018 CY - Evry, France DA - 20.06.2018 KW - Fibre Break Accumulation KW - Carbon Fibre Pressure Vessels KW - Time Effect KW - Integral Range PY - 2018 AN - OPUS4-45567 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Widjaja, Martinus Putra A1 - Moosavi, R. A1 - John, Sebastian A1 - Schumacher, David A1 - Grunwald, Marcel A1 - Auster, Jürgen A1 - Szczepaniak, Marius A1 - Mair, Georg A1 - Waske, Anja T1 - Impact damage evaluation of hydrogen composite pressure vessels by analysing computed tomography images N2 - The objective of this work is to find a method that describes the degree of damage from an impact experiment. This experiment was performed on Composite Pressure Vessels (CPV) in order to find the correlation of impact damage to the residual burst pressure. Computed Tomography (CT) approach was used to capture the before and after impact condition of the CPVs. The Wasserstein function was used to calculate how much the after impact image has differed from the original one. In the end, a good correlation was obtained to the residual burst pressure. The smaller the Wasserstein distance is, the higher the residual burst pressure would be and vice versa. T2 - HyFiSyn Conference CY - Online meeting DA - 15.09.2021 KW - Hydrogen KW - Composite pressure vessel KW - Carbon fibre KW - Burst test KW - Image analysis KW - Computed tomography (CT) PY - 2021 AN - OPUS4-53496 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Widjaja, Martinus Putra T1 - The Application of a Reduced Volume Method for the Simulation of the Characterisation of a Carbon Fibre Pressure Vessel N2 - The fibre-break model developed at Mines ParisTech has been able to show the effect of pressurisation rate on pressure vessels. This simulation however had to use a smaller model, as the computation time becomes enormous for simulating a real-scale pressure vessel. Reduced volume method then has been studied on different model configuration. The study showed that the method can be used only on certain configurations. It also gives a positive insight to reduce the computation time. T2 - FiBreMoD Consortium Meeting CY - Leuven, Belgium DA - 18.04.2018 KW - Reduced volume method KW - Integral range KW - Fibre break model KW - Representative volume element KW - Computation time PY - 2018 AN - OPUS4-45638 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Widjaja, Martinus Putra T1 - Accumulation of fibre breaks under time-dependent loads in CFRP materials of pressure vessels N2 - For the moment, there is no existing method to quantify the time-dependent effect on carbon fibre pressure vessels or composite pressure vessels (CPV) in general. Hence, BAM started to investigate how to proof this phenomenon. Several researches has been done and discovered that it is possible for aged pressure vessels to have higher burst pressure value than a new vessels. However, the scientific explanation behind is still an on-going research. Whether the existing model can be used or using another measurement method to gain more data is still in question. Therefore, it is required to find a suitable method to explain such phenomenon and even develop furthermore to give a strength criterion for certain types of pressure vessels T2 - Fibremod 1st Consortium Meeting CY - Berlin, Germany DA - 04.10.2017 KW - Carbon fibre pressure vessels KW - Damage accumulation KW - Acoustic emission KW - Fibre-break model PY - 2017 AN - OPUS4-42499 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Dayani, Shahabeddin A1 - Markötter, Henning A1 - Schmidt, Anita A1 - Widjaja, Martinus Putra A1 - Bruno, Giovanni T1 - Multi-level X-ray computed tomography (XCT) investigations of commercial lithium-ion batteries from cell to particle level N2 - Adopting X-ray computed tomography (XCT) for ex-situ characterization of battery materials has gained interest in the past decade. The main goal of this paper is to demonstrate the effectiveness of several X-ray computer tomography techniques to study commercial batteries. General guidelines are provided to select the most suitable imaging equipment and parameters for investigations of lithium-ion batteries, spanning the length scales from cell to electrode, down to particle level. Relevantly, such parameters would also be suitable for operando experiments. Safety mechanisms and manufacturing inconsistencies at cell level as well as defects and inhomogeneity in cathode and anode is illustrated and quantified. Furthermore, relation of beam energy and sample-detector-distance on contrast retrieved from attenuation and phase shift is inspected using Synchrotron XCT. KW - Non-destructive testing KW - X-ray computed tomography KW - Synchrotron X-ray computed tomography KW - Lithium-ion battery PY - 2023 DO - https://doi.org/10.1016/j.est.2023.107453 SN - 2352-152X VL - 66 SP - 107453 PB - Elsevier Ltd. AN - OPUS4-57512 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Widjaja, Martinus Putra A1 - Alves, M. A1 - Mavrogordato, M. A1 - Joannes, S. A1 - Bunsell, A. A1 - Mair, Georg A1 - Thionnet, A. T1 - Effect of the time dependent loading of type IV cylinders using a multiscale model N2 - Based on the burst test results conducted at BAM, loading rates will affect the strength of composite pressure vessels (CPV). The multiscale fibre-break model developed at Mines ParisTech is able to described this behaviour explained by the stress relaxation in the viscoelastic matrix. The experiment showed an increase of burst pressure when an extreme slow loading rate is used compare to the slow loading rate. Is is then discovered that the model could predict well for the slow loading rate but not for the extreme slow loading rate. It may have something to do with the fibre re-orientation of the hoop layer during the extreme slow loading rate test. Further investigation is required to discover this hypothesis. T2 - International Conference on Hydrogen Safety CY - Adelaide, Australia DA - 24.09.2019 KW - Composite pressure vessels KW - Fibre break KW - Multiscale model KW - Time dependent effect PY - 2019 AN - OPUS4-50262 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Widjaja, Martinus Putra T1 - Sample Performance Chart (SPC) for displaying the results from a multiscale model N2 - The stacking sequence of a real scale type IV pressure vessels has been found. Feasibility study of a multiscale model has been carried out by modifying the original stacking sequence. All of the results were displayed in a Sample Performance Chart (SPC), where different burst pressure in terms of mean and scatter had been found. T2 - Consortium Meeting FiBreMoD CY - Valence, France DA - 17.02.2020 KW - Fibre break KW - Multiscale model KW - Reduced volume method KW - Sample performance chart KW - Type IV pressure vessels PY - 2020 AN - OPUS4-50563 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Widjaja, Martinus Putra A1 - Islam, F. A1 - Joannes, S. A1 - Bunsell, A. A1 - Mair, Georg A1 - Thionnet, A. T1 - Effect of input properties on the predicted failure of a composite pressure vessel using a multiscale model N2 - The effect of different Weibull parameter from different carbon fibres to predict the failure of a type IV pressure vessel has been analysed. In addition, the effect of the shape and scale parameter has also been done. T700S fibres gave higher burst pressure prediction as it has higher scale parameter and higher stiffness of the fibres. When smaller scale parameter is introduced, lower burst pressure prediction was found and vice versa. Whereas, higher burst pressure prediction was observed when smaller shape parameter was used and vice versa. The latter must have something to do with the higher probability of stronger and weaker fibres in the smaller percentile. T2 - FiBreMoD Conference CY - Leuven, Belgium DA - 11.12.2019 KW - Composite pressure vessel KW - Fibre break KW - Multiscale model KW - Weibull parameters PY - 2019 AN - OPUS4-50115 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Widjaja, Martinus Putra A1 - Islam, F. A1 - Joannes, S. A1 - Bunsell, A. A1 - Mair, Georg A1 - Thionnet, A. T1 - Effect of input properties on the predicted failure of a composite pressure vessel using a multiscale model N2 - It is pertinent to have a correct description of fibre strength described by the twp parameter Weibull distribution when evaluating a type Iv pressure vessel using the fibre break multiscale model developed at Mines ParisTech. Earlier studies have shown a positive comparison result when T600S fibre strength were used. This study has discovered what would be the effect on the predicted strength when T700S strength is used. T2 - FiBreMoD Conference CY - Leuven, Belgium DA - 11.12.2019 KW - Composite Pressure Vessel KW - Fibre break KW - Multiscale model KW - Weibull parameter PY - 2019 SP - 55 EP - 56 AN - OPUS4-50109 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -