Prof. Dr.-Ing. habil. Bodo Fiedler
21073 Hamburg Tel. +49 40/42878-3038E-mail contactWebsite
he Institute of Polymer and Composites of the Hamburg University of Technology (TUHH) researches the mechanical, electrical and thermal properties of fiber reinforced composites (FRP) in order to make the materials and products as durable as possible.
In the field of worldwide research, the Institute plays a leading role in additional functions of these FKV structural materials, such as structural health monitoring by means of strain-sensitive electrical conductivity of the modified polymer matrix. The property improvements are realized by means of optimized fiber arrangement and nanoparticles, such as carbon nanotubes (CNT) or graphene, which are introduced into the matrix polymer in targeted distribution.
Our cross-scale approach includes material development, manufacturing and processing processes as well as mechanical and non-destructive testing for damage development and modelling of life prediction. Methods for online inspection (SHM) are developed, differentiating between the influence of manufacturing defects (e.g. pores) and operational defects (e.g. impact damage) on the service life.
- Material development, processing, testing and modelling
- Carbon-based nanomaterials for tailored property improvement, sensors and energy storage in 2D and 3D configuration
- Lifetime of fiber polymer composites for aviation, wind power, mobility and life science
- Cross-scale fundamental understanding of degradation caused by mechanical stress and environmental influences
Mechanical Testing
- Universal testing machines (50 N, 2.5 kN, 10 kN, 100 kN with thermal chamber, 400 kN) - static testing
- Servo-hydraulic testing machines (40 kN, 63 kN with thermal chamber, 100 kN, 250 kN) - cyclic testing
- Vibration tests, torque-bias test, and pressure simulations
- Drop tower (impact energy up to 20 J)
- Hexapod test facility (dynamic test facility for testing multi-axially loaded structures, up to 500 kN) Weitere Informationen
- Instrumented Charpy or Izod impact test
- Shore hardness, (A, D)
Nondestructive Testing
- Digital image correlation (DIC)
- Acoustic emission testing (AE)
- Thermography (infrared camera)
- Ultrasonic testing
- X-Ray
Analysis and Thermoanalysis
- Rheometer and DMA (DMA- TA Ares RDA III)
- Dynamic mechanical thermal analysis (DMTA) - Testing in tension, bending, and compression mode possible
- Differential scanning calorimetry (DSC)
- Thermogravimetric analysis (TGA)
- Impedance analyzer for measuring electrical conductivity
- Thermal conduction (Xenon Flash)
- Raman spectroscopy
- Fourier transform infrared spectroscopy (FTIR)
Mikroscopy
- Light microscopy (differential interference contrast, photoelasticity)
- Ultracut microtome
- Transmission electron microscopy (TEM) with EDX setup (120kV and 250 kV)
- Atomic force microscope with nanoindenter (AFM)
- Scanning electron microscope (SEM) with EDX setup
Manufacturing and Processing
- Prepreg autoclave process
- Resin Transfer Moulding (RTM)
- Vacuum Assisted Resin Infusion (VARI)
- Heating press
- Kneader with dosing system
- Injection moulding machine
- Extruder
- Three roll mill
- Chemical Vapour Deposition (CVD) reactors
- Sonification
The projects are basic research and application-oriented and are often funded by Federal Ministries, the DFG, the State of Hamburg or in direct cooperation with industry. Detailed information on individual projects can be found on the Website of the Institute of Polymer and Composites
• Borba, N.Z., Körbelin, J., Fiedler, B., dos Santos, J.F., Amancio-Filho, S.T.: Low-velocity impact response of friction riveted joints for aircraft application. (2020) Materials and Design, 186, art. no. 108369, .
• Borba, N.Z., Kötter, B., Fiedler, B., dos Santos, J.F., Amancio-Filho, S.T.: Mechanical integrity of friction-riveted joints for aircraft applications. (2020) Composite Structures, 232, art. no. 111542, .
• Sui, X.M., Tiwari, M., Greenfeld, I., Khalfin, R.L., Meeuw, H., Fiedler, B., Wagner, H.D.: Extreme scale-dependent tensile properties of epoxy fibers. (2019) Express Polymer Letters, 13 (11), pp. 993-1003.
• Taale, M., Krüger, D., Ossei-Wusu, E., Schütt, F., Rehman, M.A.U., Mishra, Y.K., Marx, J., Stock, N., Fiedler, B., Boccaccini, A.R., Willumeit-Römer, R., Adelung, R., Selhuber-Unkel, C.: Systematically Designed Periodic Electrophoretic Deposition for Decorating 3D Carbon-Based Scaffolds with Bioactive Nanoparticles. (2019) ACS Biomaterials Science and Engineering, 5 (9), pp. 4393-4404.
• Ghimpu, L., Lupan, O., Postica, V., Strobel, J., Kienle, L., Terasa, M.-I., Mintken, M., Tiginyanu, I., Marx, J., Fiedler, B., Adelung, R.: Individual CdS-covered aerographite microtubes for room temperature VOC sensing with high selectivity. (2019) Materials Science in Semiconductor Processing, 100, pp. 275-282.
• Studer, J., Dransfeld, C., Jauregui Cano, J., Keller, A., Wink, M., Masania, K., Fiedler, B.: Effect of fabric architecture, compaction and permeability on through thickness thermoplastic melt impregnation. (2019) Composites Part A: Applied Science and Manufacturing, 122, pp. 45-53.
• Schuett, M., Karsten, J., Schott, L., Wittich, H., Schulte, K., Fiedler, B.: Experimental and analytical study of an CF-PEEK Fastener all composites single-lap shear joint under static and fatigue loading. (2019) CEAS Aeronautical Journal, 10 (2), pp. 565-587.
• Harder, S., Schmutzler, H., Hergoss, P., Freese, J., de, Holtmannspötter, J., Fiedler, B.: Effect of infrared laser surface treatment on the morphology and adhesive properties of scarfed CFRP surfaces. (2019) Composites Part A: Applied Science and Manufacturing, 121, pp. 299-307.
• Marx, J., Berns, J.-C., Spille, C., Mintken, M., Adelung, R., Schlüter, M., Fiedler, B.: Theoretical Computational Fluid Dynamics Study of the Chemical Vapor Deposition Process for the Manufacturing of a Highly Porous 3D Carbon Foam. (2019) Chemical Engineering and Technology, 42 (6), pp. 1240-1246.
• Meeuw, H., Wisniewski, V.K., Köpke, U., Nia, A.S., Vázquez, A.R., Lohe, M.R., Feng, X., Fiedler, B.: In-line monitoring of carbon nanoparticle epoxy dispersion processes: Insights into the process via next generation three roll mills and impedance spectroscopy: (2019) Production Engineering, 13 (3-4), pp. 373-390.
• Plunkett, A., Kröning, K., Fiedler, B.: Highly optimized nitrogen-doped MWCNTs through in-Depth parametric study using design of experiments. (2019) Nanomaterials, 9 (4), art. no. 643, .
• Marx, J., Lewke, M.R.D., Smazna, D., Mishra, Y.K., Adelung, R., Schulte, K., Fiedler, B.: Processing, growth mechanism and thermodynamic calculations of carbon foam with a hollow tetrapodal morphology – Aerographite. (2019) Applied Surface Science, 470, pp. 535-542.
• Strobel, J., Ghimpu, L., Postica, V., Lupan, O., Zapf, M., Schönherr, S., Röder, R., Ronning, C., Schütt, F., Mishra, Y.K., Tiginyanu, I., Adelung, R., Marx, J., Fiedler, B., Kienle, L.: Improving gas sensing by CdTe decoration of individual Aerographite microtubes. (2019) Nanotechnology, 30 (6), art. no. 065501, .
• Taale, M., Schütt, F., Carey, T., Marx, J., Mishra, Y.K., Stock, N., Fiedler, B., Torrisi, F., Adelung, R., Selhuber-Unkel, C.: Biomimetic Carbon Fiber Systems Engineering: A Modular Design Strategy to Generate Biofunctional Composites from Graphene and Carbon Nanofibers. (2019) ACS Applied Materials and Interfaces, 11 (5), pp. 5325-5335.
• Leopold, C., Just, G., Koch, I., Schetle, A., Kosmann, J.B., Gude, M., Fiedler, B.: Damage mechanisms of tailored few-layer graphene modified CFRP cross-ply laminates. (2019) Composites Part A: Applied Science and Manufacturing, 117, pp. 332-344.
• Meeuw, H., Körbelin, J., Wisniewski, V.K., Nia, A.S., Vázquez, A.R., Lohe, M.R., Feng, X., Fiedler, B.: Carbon nanoparticles' impact on processability and physical properties of epoxy resins-A comprehensive study covering rheological, electrical, thermo-mechanical, and fracture properties (mode I and II). (2019) Polymers, 11 (2), art. no. 231, .
• Bosbach, B., Baytekin-Gerngross, M., Sprecher, E., Wegner, J., Gerngross, M.-D., Carstensen, J., Adelung, R., Fiedler, B.. Maximizing bearing fatigue lifetime and CAI capability of fibre metal laminates by nanoscale sculptured Al plies. (2019) Composites Part A: Applied Science and Manufacturing, 117, pp. 144-155.
• Marx, J., Roth, S., Brouschkin, A., Smazna, D., Mishra, Y.K., Schulte, K., Adelung, R., Fiedler, B.: Tailored crystalline width and wall thickness of an annealed 3D carbon foam composites and its mechanical property. (2019) Carbon, 142, pp. 60-67.
• Meeuw, H., Radek, M., Fiedler, B.: Development of a colored GFRP with antistatic properties. (2019) AIP Conference Proceedings, 2055, art. no. 090007, .
• Leopold, C., Harder, S., Philipkowski, T., Liebig, W.V., Fiedler, B.: Comparison of analytical approaches predicting the compressive strength of fibre reinforced polymers. (2018) Materials, 10 (12), art. no. 2517, .
• Körbelin, J., Derra, M., Fiedler, B.: Influence of temperature and impact energy on low velocity impact damage severity in CFRP. (2018) Composites Part A: Applied Science and Manufacturing, 115, pp. 76-87.
• Plesco, I., Strobel, J., Schütt, F., Himcinschi, C., Ben Sedrine, N., Monteiro, T., Correia, M.R., Gorceac, L., Cinic, B., Ursaki, V., Marx, J., Fiedler, B., Mishra, Y.K., Kienle, L., Adelung, R., Tiginyanu, I.: Hierarchical Aerographite 3D flexible networks hybridized by InP micro/nanostructures for strain sensor applications. (2018) Scientific Reports, 8 (1), art. no. 13880, .
• Bosbach, B., Baytekin-Gerngross, M., Heyden, E., Gerngross, M.-D., Carstensen, J., Adelung, R., Fiedler, B.: Reaching maximum inter-laminar properties in GFRP/nanoscale sculptured aluminium ply laminates. (2018) Composites Science and Technology, 167, pp. 32-41.
• Meeuw, H., Wisniewski, V.K., Fiedler, B.: Frequency or amplitude?-rheo-electrical characterization of carbon nanoparticle filled epoxy systems. (2018) Polymers, 10 (9), art. no. 999, .
• Jia, Y., Fiedler, B.: Influence of furfuryl alcohol fiber pre-treatment on the moisture absorption and mechanical properties of flax fiber composites. (2018) Fibers, 6 (3), art. no. 59, .
• Augustin, T., Karsten, J., Fiedler, B.: Detection and localization of impact damages in carbon nanotube–modified epoxy adhesive films with printed circuits. (2018) Structural Health Monitoring, 17 (5), pp. 1166-1177.
• Marx, J., Wilhelmy, F., Beisch, H., Fiedler, B.: Manufacturing of a hierarchical carbon foam with tailored catalytically Me/MexOy particles. (2018) Vacuum, 155, pp. 490-495.
• Bosbach, B., Ohle, C., Fiedler, B.: Structural health monitoring of fibre metal laminates under mode I and II loading. (2018) Composites Part A: Applied Science and Manufacturing, 107, pp. 471-478.
• Augustin, T., Karsten, J., Kötter, B., Fiedler, B.: Health monitoring of scarfed CFRP joints under cyclic loading via electrical resistance measurements using carbon nanotube modified adhesive films. (2018) Composites Part A: Applied Science and Manufacturing, 105, pp. 150-155.
• Marx, J., Brouschkin, A., Roth, S., Smazna, D., Mishra, Y.K., Wittich, H., Schulte, K., Adelung, R., Fiedler, B.: Fundamentals of the temperature-dependent electrical conductivity of a 3D carbon foam—Aerographite. (2018) Synthetic Metals, 235, pp. 145-152.
• Leopold, C., Augustin, T., Schwebler, T., Lehmann, J., Liebig, W.V., Fiedler, B.: Influence of carbon nanoparticle modification on the mechanical and electrical properties of epoxy in small volumes. (2017) Journal of Colloid and Interface Science, 506, pp. 620-632.
• Augustin, T., Fiedler, B.: Health monitoring of CFRP using printed circuits. (2017) JEC Composites Magazine, 54 (117), pp. 61-63.
• Leopold, C., Schütt, M., Liebig, W.V., Philipkowski, T., Kürten, J., Schulte, K., Fiedler, B.: Compression fracture of CFRP laminates containing stress intensifications. (2017) Materials, 10 (9), art. no. 1039, .
• Lupan, O., Postica, V., Marx, J., Mecklenburg, M., Mishra, Y.K., Schulte, K., Fiedler, B., Adelung, R.: Individual hollow and mesoporous aero-graphitic microtube based devices for gas sensing applications. (2017) Applied Physics Letters, 110 (26), art. no. 263109, .
• Meija, R., Signetti, S., Schuchardt, A., Meurisch, K., Smazna, D., Mecklenburg, M., Schulte, K., Erts, D., Lupan, O., Fiedler, B., Mishra, Y.K., Adelung, R., Pugno, N.M.: Nanomechanics of individual aerographite tetrapods. (2017) Nature Communications, 8, art. no. 14982, .
• Augustin, T., Karsten, J., Fiedler, B.: Impact damage detection and localization of adhesively bonded fiber reinforced structures using silver nanoparticle based printed circuits. (2017) Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017, 1, pp. 1461-1468.
• Bosbach, B., Ohle, C., Fiedler, B.: Structural health monitoring of multifunctional fibre metal laminates under mode i loading. (2017) Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017, 2, pp. 1976-1983.
• Garlof, S., Mecklenburg, M., Smazna, D., Mishra, Y.K., Adelung, R., Schulte, K., Fiedler, B.: 3D carbon networks and their polymer composites: Fabrication and electromechanical investigations of neat Aerographite and Aerographite-based PNCs under compressive load. (2017) Carbon, 111, pp. 103-112.
• Meeuw, H., Viets, C., Liebig, W.V., Schulte, K., Fiedler, B.: Morphological influence of carbon nanofillers on the piezoresistive response of carbon nanoparticle/epoxy composites under mechanical load. (2016) European Polymer Journal, 85, pp. 198-210.
• Protz, R., Kosmann, N., Fritsch, D., Fey, P., Essig, W., Dietrich, K., Gude, M., Horst, P., Kreutzbruck, M., Schulte, K., Busse, G., Hufenbach, W., Fiedler, B.: Influence of voids and impact damage on the fatigue behaviour of large scale composites: Einfluss von Poren und Schlagschäden auf das Ermüdungsverhalten von Großstrukturen [Einfluss von Poren und Schlagschäden
auf das Ermüdungsverhalten von Großstrukturen]. (2016) Materialwissenschaft und Werkstofftechnik, 47 (11), pp. 1058-1071.
• Leopold, C., Liebig, W.V., Wittich, H., Fiedler, B.: Size effect of graphene nanoparticle modified epoxy matrix. (2016) Composites Science and Technology, 134, pp. 217-225.
• Johannsen, I., Jaksik, K., Wirch, N., Pötschke, P., Fiedler, B., Schulte, K.: Electrical conductivity of melt-spun thermoplastic poly(hydroxy ether of bisphenol A) fibres containing multi-wall carbon nanotubes. (2016) Polymer (United Kingdom), 97, pp. 80-94.
• Schnoor, T.I.W., Vainio, U., Shao, L.-H., Lilleodden, E.T., Müller, M., Schreyer, A., Schulte, K., Fiedler, B.: Nanostructured MWCNT/Polypyrrole Actuators with Anisotropic Strain Response. (2016) Advanced Engineering Materials, 18 (4), pp. 597-607.
• Mecklenburg, M., Mizushima, D., Ohtake, N., Bauhofer, W., Fiedler, B., Schulte, K.: Erratum: On the manufacturing and electrical and mechanical properties of ultra-high wt.% fraction aligned MWCNT and randomly oriented CNT epoxy composites. (2016) Carbon, 98, p. 195.
• Chandrasekaran, S., Liebig, W.V., Mecklenburg, M., Fiedler, B., Smazna, D., Adelung, R., Schulte, K.: Fracture, failure and compression behaviour of a 3D interconnected carbon aerogel (Aerographite) epoxy composite. (2016) Composites Science and Technology, 122, pp. 50-58.
• Liebig, W.V., Schulte, K., Fiedler, B.: Hierarchical analysis of the degradation of fibre-reinforced polymers under the presence of void imperfections. (2016) Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 374 (2071), art. no. 20150279.
• Protz, R., Kosmann, N., Gude, M., Hufenbach, W., Schulte, K., Fiedler, B.: Voids and their effect on the strain rate dependent material properties and fatigue behaviour of non-crimp fabric composites materials. (2015) Composites Part B: Engineering, 83, pp. 346-351.
• Shen, J.T., Buschhorn, S.T., De Hosson, J., Schulte, K., Fiedler, B.: Pressure and temperature induced electrical resistance change in nano-carbon/epoxy composites. (2015) Composites Science and Technology, 115, pp. 1-8.
• Mecklenburg, M., Mizushima, D., Ohtake, N., Bauhofer, W., Fiedler, B., Schulte, K.: On the manufacturing and electrical and mechanical properties of ultra-high wt.% fraction aligned MWCNT and randomly oriented CNT epoxy composites. (2015) Carbon, 91, pp. 275-290.
• Kosmann, N., Karsten, J.M., Schuett, M., Schulte, K., Fiedler, B.: Determining the effect of voids in GFRP on the damage behaviour under compression loading using acoustic emission. (2015) Composites Part B: Engineering, 70, pp. 184-188.
• Schmutzler, H., Garcia, A., Sato, N., Wittich, H., Nishikawa, M., Rohling, H., Hojo, M., Schulte, K., Fiedler, B.: Influence of delamination characteristics in carbon fibre/epoxy laminates on signal features of pulse thermography. (2015) Journal of Nondestructive Evaluation, 34(1), p.10.
• Kosmann, N., Riecken, B.T., Schmutzler, H., Knoll, J.B., Schulte, K., Fiedler, B.: Evaluation of a critical impact energy in GFRP under fatigue loading. (2014) Composites Science and Technology, 102, pp. 28-34.
• Chandrasekaran, S., Sato, N., Tölle, F., Mülhaupt, R., Fiedler, B., Schulte, K.: Fracture toughness and failure mechanism of graphene based epoxy composites. (2014) Composites Science and Technology, 97, pp. 90-99.
• Knoll, J.B., Koch, I., Schulte, K., Gude, M., Fiedler, B.: Damage mechanisms of nanoparticle-modified CFRP under very high cycle fatigue-loading. (2014) 16th European Conference on Composite Materials, ECCM 2014.
• Knoll, J.B., Riecken, B.T., Kosmann, N., Chandrasekaran, S., Schulte, K., Fiedler, B.: The effect of carbon nanoparticles on the fatigue performance of carbon fibre reinforced epoxy. (2014) Composites Part A: Applied Science and Manufacturing, 67, pp. 233-240.
• Schuett, M., Wittich, H., Nussbaeumer, F., Schulte, K., Fiedler, B.: Inverstigation on the failure mechanism of composite fasteners with countersunk head in fatigue loading. (2014) 16th European Conference on Composite Materials, ECCM 2014.
• Vogel, S., Dransfeld, C., Fiedler, B., Gobrecht, J.: Protective effect of thin alumina layer on carbon fibre to preserve tensile strength during CNT growth by CVD. (2014) 16th European Conference on Composite Materials, ECCM 2014.
• Schmutzler, H., Popp, J., Büchter, E., Wittich, H., Schulte, K., Fiedler, B.: Improvement of bonding strength of scarf-bonded carbon fibre/epoxy laminates by Nd:YAG laser surface activation. (2014) Composites Part A: Applied Science and Manufacturing, 67, pp. 123-130.
• Kosmann, N., Schmutzler, H., Schulte, K., Fiedler, B.: Influence of impact damages on the fatigue behaviour of composites (2014) 16th European Conference on Composite Materials, ECCM 2014.