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Relevant bibliographies by topics / CF/PEEK

Academic literature on the topic 'CF/PEEK'

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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Journal articles on the topic "CF/PEEK"

1

Pan, Yusong, Yan Chen, Qianqian Shen, and Chengling Pan. "Effect of carbon fiber surface modification on the flexural mechanical properties of carbon fiber reinforced polyetheretherketone biocomposites." Journal of Polymer Engineering 35, no. 7 (September 1, 2015): 657–63. http://dx.doi.org/10.1515/polyeng-2014-0287.

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Abstract Carbon fiber (CF) reinforced polyetheretherketone (PEEK) is one of the most promising orthopedic implant biomaterials. In this paper, CF reinforced PEEK biocomposites were fabricated by hot press molding technology. The influence of the CF surface modification on the flexural mechanical properties of CF/PEEK biocomposites was investigated. Studies on the flexural mechanical properties of CF/PEEK biocomposites revealed that the flexural stress-strain behavior of the biocomposites possessed linear elastic characteristics. The fracture mechanism of the biocomposites was predominated by brittle rupture. Both flexural strength and modulus of the biocomposites obviously increased with the rise of CF content. The influence degree of different CF modification on the flexural properties of CF/PEEK biocomposites increased with the rise of CF content. Moreover, the CF modified by concentrated HNO3 is beneficial for the flexural strength of the CF/PEEK biocomposites improvement. Conversely, CF modified by KH-560 coupling agent played an adverse influence on the flexural strength of the biocomposites.

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Zhang, Jian Guo, and Chi Lan Cai. "Friction and Wear Properties of Carbon Fiber Reinforced PEEK Composites under Water Lubrication." Applied Mechanics and Materials 66-68 (July 2011): 1051–54. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.1051.

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The present study establishes the relationships between the carbon fibers (CF) content and the trbological properties of Polyether ether ketone (PEEK) composite. PEEK composites such as unreinforced PEEK, reinforced PEEK with different content of carbon fibres were used for the tribological tests. The results indicated that CF/PEEK composite had better tribological properties than pure PEEK. Some CF was ground and squeezed, then mixed with debris on the worn surface, which improved the wear resistance greatly. The low friction coefficient of CF/PEEK composite caused little change in the temperature and further ensured the stable state of sliding.

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Laux, Christoph J., Christina Villefort, Stefanie Ehrbar, Lotte Wilke, Matthias Guckenberger, and Daniel A. Müller. "Carbon Fiber/Polyether Ether Ketone (CF/PEEK) Implants Allow for More Effective Radiation in Long Bones." Materials 13, no. 7 (April 9, 2020): 1754. http://dx.doi.org/10.3390/ma13071754.

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Background: Metallic implants show dose-modulating effects in radiotherapy and complicate its computed tomography (CT)-based planning. Dose deviations might not only affect the surrounding tissues due to backscattering and inadvertent dose increase but might also compromise the therapeutic effect to the target lesion due to beam attenuation. Later on, follow-up imaging is often obscured by metallic artefacts. Purposes: This study investigates the dosimetric impact of titanium and radiolucent carbon fiber/polyether ether ketone (CF/PEEK) implants during adjuvant radiation therapy in long bones. (1) Does the use of CF/PEEK implants allow for a more homogenous application of radiation? (2) Is the dose delivery to the target volume more efficient when using CF/PEEK implants? (3) Do CF/PEEK implants facilitate CT-based radiation therapy planning? Materials and methods: After CT-based planning, bone models of six ovine femora were irradiated within a water phantom in two immersion depths to simulate different soft-tissue envelopes. Plates and intramedullary nails of both titanium and CF/PEEK were investigated. Radiation dosage and distribution patterns were mapped using dosimetry films. Results: First, the planned implant-related beam attenuation was lower for the CF/PEEK plate (1% vs. 5%) and the CF/PEEK nail (2% vs. 9%) than for corresponding titanium implants. Secondly, the effective decrease of radiation dosage behind the implants was noticeably smaller when using CF/PEEK implants. The radiation dose was not significantly affected by the amount of surrounding soft tissues. A significant imaging artefact reduction was seen in all CF/PEEK models. Conclusion: CF/PEEK implants lead to a more reliable and more effective delivery of radiation dose to an osseous target volume. With regard to radiation therapy, the use of CF/PEEK implants appears to be particularly beneficial for intramedullary nails.

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Korycki, Adrian, Christian Garnier, Margot Bonmatin, Elisabeth Laurent, and France Chabert. "Assembling of Carbon Fibre/PEEK Composites: Comparison of Ultrasonic, Induction, and Transmission Laser Welding." Materials 15, no. 18 (September 13, 2022): 6365. http://dx.doi.org/10.3390/ma15186365.

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In the present work, an ultrasonic, an induction, and a through transmission laser welding were compared to join carbon fibre reinforced polyetheretherketone (CF/PEEK) composites. The advantages and drawbacks of each process are discussed, as well as the material properties required to fit each process. CF/PEEK plates were consolidated at 395 °C with an unidirectional sequence and cross-stacking ply orientation. In some configurations, a polyetherimide (PEI) layer or substrate was used. The thermal, mechanical, and optical properties of the materials were measured to highlight the specific properties required for each process. The drying conditions were defined as 150 °C during at least 8 h for PEI and 24 h for CF/PEEK to avoid defects due to water. The optical transmission factor of PEI is above 40% which makes it suitable for through transmission laser welding. The thermal conductivity of CF/PEEK is at most 55 W·(m·K)−1, which allows it to weld by induction without a metallic susceptor. Ultrasonic welding is the most versatile process as it does not necessitate any specific properties. Then, the mechanical resistance of the welds was measured by single lap shear. For CF/PEEK on CF/PEEK, the maximum lap shear strength (LSS) of 28.6 MPa was reached for a joint obtained by ultrasonic welding, while an induction one brought 17.6 MPa. The maximum LSS of 15.2 MPa was obtained for PEI on CF/PEEK assemblies by laser welding. Finally, interfacial resistances were correlated to the fracture modes through observations of the fractured surfaces. CF/PEEK on CF/PEEK joints resulted in mixed cohesive/adhesive failure at the interface and within the inner layers of both substrates. This study presents a guideline to select the suitable welding process when assembling composites for the aerospace industry.

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Adler, Daniel, Michael Akbar, Anna Spicher, Stephanie-Alice Goerke, and Werner Schmoelz. "Biomechanical Study of a Novel, Expandable, Non-Metallic and Radiolucent CF/PEEK Vertebral Body Replacement (VBR)." Materials 12, no. 17 (August 26, 2019): 2732. http://dx.doi.org/10.3390/ma12172732.

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Vertebral body replacement is well-established to stabilize vertebral injuries due to trauma or cancer. Spinal implants are mainly manufactured by metallic alloys; which leads to artifacts in radiological diagnostics; as well as in radiotherapy. The purpose of this study was to evaluate the biomechanical data of a novel carbon fiber reinforced polyetheretherketone (CF/PEEK) vertebral body replacement (VBR). Six thoracolumbar specimens were tested in a six degrees of freedom spine tester. In all tested specimens CF/PEEK pedicle screws were used. Two different rods (CF/PEEK versus titanium) with/without cross connectors and two different VBRs (CF/PEEK prototype versus titanium) were tested. In lateral bending and flexion/extension; range of motion (ROM) was significantly reduced in all instrumented states. In axial rotation; the CF/PEEK combination (rods and VBR) resulted in the highest ROM; whereas titanium rods with titanium VBR resulted in the lowest ROM. Two cross connectors reduced ROM in axial rotation for all instrumentations independently of VBR or rod material. All instrumented states in all planes of motion showed a significantly reduced ROM. No significant differences were detected between the VBR materials in all planes of motion. Less rigid CF/PEEK rods in combination with the CF/PEEK VBR without cross connectors showed the smallest reduction in ROM. Independently of VBR and rod material; two cross connectors significantly reduced ROM in axial rotation. Compared to titanium rods; the use of CF/PEEK rods results in higher ROM. The stiffness of rod material has more influence on the ROM than the stiffness of VBR material.

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Jeon, In Sung, Moon Hyun Lee, Han-Hyeong Choi, Sangwoon Lee, Joon Woo Chon, Dong June Chung, Jong Hyuk Park, and Jae Young Jho. "Mechanical Properties and Bioactivity of Polyetheretherketone/Hydroxyapatite/Carbon Fiber Composite Prepared by the Mechanofusion Process." Polymers 13, no. 12 (June 16, 2021): 1978. http://dx.doi.org/10.3390/polym13121978.

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The main obstacles in the melt-processing of hydroxyapatite (HA) and carbon fiber (CF) reinforced polyetheretherketone (PEEK) composite are the high melting temperature of PEEK, poor dispersion of HA nanofillers, and poor processability due to high filler content. In this study, we prepared PEEK/HA/CF ternary composite using two different non-melt blending methods; suspension blending (SUS) in ethanol and mechanofusion process (MF) in dry condition. We compared the mechanical properties and bioactivity of the composite in a spinal cage application in the orthopedic field. Results showed that the PEEK/HA/CF composite made by the MF method exhibited higher flexural and compressive strengths than the composite prepared by the SUS method due to the enhanced dispersibility of HA nanofiller. On the basis of in vitro cell compatibility and cell attachment tests, PEEK/HA/CF composite by mechanofusion process showed an improvement in in vitro bioactivity and osteo-compatibility.

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Guo, Cheng, Xiaohua Liu, and Guang Liu. "Surface Finishing of FDM-Fabricated Amorphous Polyetheretherketone and Its Carbon-Fiber-Reinforced Composite by Dry Milling." Polymers 13, no. 13 (June 30, 2021): 2175. http://dx.doi.org/10.3390/polym13132175.

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In recent years, many investigations have been devoted to fused deposition modeling (FDM) of high-performance polymer-polyetheretherketone (PEEK) and carbon-fiber-reinforced PEEK (CF/PEEK) for biomedical and aerospace applications. However, the staircase effect naturally brought about by FDM restricts further applications of 3D-printed PEEK and its composites in high-temperature molds, medical implants, and precision components, which require better or customized surface qualities. Hence, this work aimed to reduce the staircase effect and improve the surface quality of 3D-printed PEEK and CF/PEEK parts by dry milling of the fluctuant exterior surface. The co-dependency between 3D printing parameters (raster angle and layer thickness) and milling parameters (depth of cut, spindle speed, and feed rate per tooth) were investigated through experiments. The difference in removal mechanisms for PEEK and CF/PEEK was revealed. It was confirmed that the smearing effect enhanced the surface quality based on the morphology analysis and the simulation model. Both the raster angle of +45°/−45° and the small layer thickness could improve the surface quality of these 3D-printed polymers after dry milling. A large depth of cut and a large feed rate per tooth were likely to deteriorate the finished polymer surface. The spindle speed could influence the morphologies without significant changes in roughness values. Finally, a demonstration was performed to verify that dry milling of 3D-printed amorphous PEEK and CF/PEEK parts could lead to a high surface quality for critical requirements.

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Song, Meiyun, Xiaoqing Wang, Ran Du, Zhen Zhou, Xiaomeng Li, Guoping Li, and Yunjun Luo. "Effects of liquid crystal polymer (LCP) on the structure and performance of PEEK/CF composites." RSC Advances 12, no. 20 (2022): 12446–52. http://dx.doi.org/10.1039/d2ra01450e.

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Here a liquid crystal polymer (LCP) was introduced into a PEEK/CF system as a new solution to simultaneously promote processing and mechanical performance of PEEK/CF and other polymer-based composites.

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Song, Meiyun, Xiaoqing Wang, Ran Du, Zhen Zhou, Xiaomeng Li, Guoping Li, and Yunjun Luo. "Effects of liquid crystal polymer (LCP) on the structure and performance of PEEK/CF composites." RSC Advances 12, no. 20 (2022): 12446–52. http://dx.doi.org/10.1039/d2ra01450e.

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Here a liquid crystal polymer (LCP) was introduced into a PEEK/CF system as a new solution to simultaneously promote processing and mechanical performance of PEEK/CF and other polymer-based composites.

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Lin, Hong-Ming, C. H. Liu, and R. F. Lee. "Effects of high pressure on the crystallization of carbon fiber reinforced polyetheretherketone (CF/PEEK) laminate composites." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 4 (August 1990): 876–77. http://dx.doi.org/10.1017/s0424820100177519.

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Polyetheretherketone (PEEK) is a crystallizable thermoplastic used as composite matrix materials in application which requires high yield stress, high toughness, long term high temperature service, and resistance to solvent and radiation. There have been several reports on the crystallization behavior of neat PEEK and of CF/PEEK composite. Other reports discussed the effects of crystallization on the mechanical properties of PEEK and CF/PEEK composites. However, these reports were all concerned with the crystallization or melting processes at or close to atmospheric pressure. Thus, the effects of high pressure on the crystallization of CF/PEEK will be examined in this study.The continuous carbon fiber reinforced PEEK (CF/PEEK) laminate composite with 68 wt.% of fibers was obtained from Imperial Chemical Industry (ICI). For the high pressure experiments, HIP was used to keep these samples under 1000, 1500 or 2000 atm. Then the samples were slowly cooled from 420 °C to 60 °C in the cooling rate about 1 - 2 degree per minute to induce high pressure crystallization. After the high pressure treatment, the samples were scanned in regular DSC to study the crystallinity and the melting temperature. Following the regular polishing, etching, and gold coating of the sample surface, the scanning electron microscope (SEM) was used to image the microstructure of the crystals. Also the samples about 25mmx5mmx3mm were prepared for the 3-point bending tests.

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Book chapters on the topic "CF/PEEK"

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Weiß, R. "Influence of Production Parameters on the Mechanical Behaviour of CF/PEEK." In Developments in the Science and Technology of Composite Materials, 1007–12. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0787-4_145.

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Kempe, G., H. Krauss, and G. Korger-Roth. "Adhesion and Welding of Continuous Carbon-Fiber Reinforced Polyether Etherketone (CF-PEEK/APC2)." In Developments in the Science and Technology of Composite Materials, 105–12. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0787-4_12.

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Morita, H., and B. R. Tittmann. "Ultrasonic Characterization of Soft Body Impact Damage on CF/PEEK Laminates with Gelatin Projectiles." In Review of Progress in Quantitative Nondestructive Evaluation, 1885–92. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-5947-4_246.

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Oliveira, V. C. C., E. M. M. Fonseca, J. Belinha, C. C. Rua, P. A. G. Piloto, and R. N. Jorge. "Optimizing long bone metastases treatment: Thermal necrosis effect with two different cement types and titanium or CF/PEEK intramedullary nail." In Advances and Current Trends in Biomechanics, 48–52. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003217152-12.

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Curtis, D. C., D. R. Moore, B. Slater, and N. Zahlan. "FATIGUE TESTING OF MULTI-ANGLE LAMINATES OF CF/PEEK." In Composites Evaluation, 40–50. Elsevier, 1987. http://dx.doi.org/10.1016/b978-0-408-02569-0.50009-x.

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Hojo, Masaki, Keisuke Tanaka, Claes-Göran Gustafson, and Kiyoshi Kemmochi. "PROPAGATION OF DELAMINATION FATIGUE CRACKS IN UNIDIRECTIONAL CF/PEEK LAMINATES." In Mechanical Behaviour of Materials VI, 531–36. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-08-037890-9.50203-9.

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Friedrich, K., J. Flöck, K. Varadi, and Z. Néder. "Real contact area, contact temperature rise and transfer film formation between original and worn surfaces of CF/PEEK composites sliding against steel." In Tribology Series, 241–52. Elsevier, 1999. http://dx.doi.org/10.1016/s0167-8922(99)80046-7.

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Conference papers on the topic "CF/PEEK"

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YOUNG, DEVIN, BRITANNIA VONDRASEK, and MICHAEL CZABAJ. "INVESTIGATION OF MECHANICAL PROPERTIES OF COMPOSITES-BASED SHEET LAMINATION ADDITIVE MANUFACTURING PROCESS." In Proceedings for the American Society for Composites-Thirty Seventh Technical Conference. Destech Publications, Inc., 2022. http://dx.doi.org/10.12783/asc37/36463.

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The Composites-Based Additive Manufacturing (CBAM) system is a novel sheet lamination process combining mats of randomly oriented carbon fiber (CF) reinforcement with thermoplastic matrix materials to fabricate composite objects. This study investigated the suitability of three ASTM test standards for tensile, inplane shear, and interlaminar fracture properties of two CBAM material systems: CF reinforced Nylon-12 (CF/PA12) and CF reinforced polyether ether ketone (CF/PEEK). The tensile, in-plane shear, and interlaminar fracture tests were well suited for the CF/PEEK material, though high variability was found in the interlaminar fracture response. The CF/PA12 material system exhibited high plasticity and evidence of a poor fiber-matrix interface. This was shown by fiber pullout in the tensile tests and the presence of voids observed on the in-plane shear surfaces. The interlaminar fracture test method was invalid for the CF/PA12 material due to a large process zone invalidating. These results show CF/PEEK to be a promising material system for the CBAM process while CF/PA12 requires further development.

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Byakov, A. V., V. O. Alexenko, and S. V. Panin. "Ultrasonic welding assisted formation of PEEK-CF layered composites." In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE “PHYSICAL MESOMECHANICS. MATERIALS WITH MULTILEVEL HIERARCHICAL STRUCTURE AND INTELLIGENT MANUFACTURING TECHNOLOGY”. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0084750.

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Chanteli, A., R. O’Higgins, J. Canart, and P. Weaver. "An Investigation of Laser Repass Annealing of LATP Processed CF/Peek Properties." In CAMX 2019. NA SAMPE, 2019. http://dx.doi.org/10.33599/nasampe/c.19.0751.

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Goerke, Daniel, Anne-Laure Le Denmat, Thomas Schmidt, Frank Kocian, and Eberhard Nicke. "Aerodynamic and Mechanical Optimization of CF/PEEK Blades of a Counter Rotating Fan." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68797.

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Since the development of the CRISP [1–3], a counter rotating integrated shrouded propfan, within a MTU-DLR program between 1985 and 2000, huge improvements in fan technologies have been made. In 2010 DLR launched an initiative to redesign the existing fan blades, taking advantage the latest developments in the field of material and manufacturing technology as well as numerical methods. The new fan blades will be made of a carbon fiber reinforced PEEK material. Compared to the so called “onion skin configuration” of CRISP-1m, the layers of the CRISP2 lamina setups are parallel to each other. In contrast to metals, carbon fiber reinforced plastics have an orthotropic material behavior and a higher stiffness mass ratio, which have to be taken into account. The existing shaft and bearing system of the CRISP-1m-model [1–3] will be reused. The blades are mounted in titanium clevises by bolting. To achieve an optimal design, it is necessary to optimize the aerodynamic performance together with the mechanical behavior within a multidisciplinary automated optimization process. The optimization featured approximately one hundred free design variables, two objective functions (maximal displacement for respectively Rotor 1 and Rotor 2), as well as a high number of aerodynamic and mechanical constraints (efficiency, total pressure ratio, axial Mach number, stress, strain, eigenfrequencies, etc.). This work shows how the challenge to integrate the modeling of CF/PEEK blades in a multidisciplinary design process were met in terms of the methods and optimization strategies involved. The major results of this optimization will be presented. This design approach will give a new CRISP blade design ready for a planned rig test in the axial compressor test rig at the DLR in Cologne.

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SAHA, SHUVAM, and RANI W. SULLIVAN. "GAS PERMEABILITY OF 3D PRINTED THERMOPLASTIC COMPOSITES FOR CRYOGENIC APPLICATIONS." In Proceedings for the American Society for Composites-Thirty Seventh Technical Conference. Destech Publications, Inc., 2022. http://dx.doi.org/10.12783/asc37/36416.

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Thermoplastics have shown promise as a choice of material for production of lightweight structures for cryogenic storage. To fully utilize thermoplastics for such applications, cryogenic fuel leakage through transverse cracks in these structures must be studied. Thermoplastic composites (carbon fiber reinforced PEEK and Nylon) were 3D printed using fused deposition modeling. Test specimens were thermally cycled from ambient (23ºC) to cryogenic (-196ºC) temperatures and gas permeability measurements were conducted at selected cryogenic cycles. Results show that carbon fiber/PEEK specimens had the lowest gas permeability after 50 cryogenic cycles with no through-thickness crack networks. The gas permeability of 3D printed thermoplastic composites was several magnitudes lower than the leak rate allowables for different launch vehicles. Tensile tests, post cryogenic cycling, revealed a reduction in the tensile strength and modulus of the 3D printed specimens with CF/PEEK having the best mechanical and permeability performance.

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Morita, Hideo, Akira Hamamoto, Tadaharu Adachi, and Ken Matsumoto. "Influence of impact velocity and lay-up parameter on impact damage resistance of CF/PEEK laminates." In 36th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-1284.

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Rodríguez-Mondéjar, Carlos, Álvaro Rodríguez-Prieto, and Ana María Camacho. "Estimation of Maximum Flow Length for CF-PEEK Overmolded Grid Structures Using the Finite Element Method." In ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-62311.

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Abstract Injection overmolding process is a high versatile process that permits, when used in combination with fiber reinforced thermoplastic composites, the obtaining of high mechanical properties structures with complex geometries in short time cycles. The maximum flow length is a parameter that reflects the success of filling in a polymer injection molding process. Geometry of the part, rheological properties of the polymer and process parameters, such as injection pressure and temperature, are involved on the value of this parameter and therefore on the viability of a certain configuration. For injection molding manufacturing, the understanding of the relation between maximum flow length and main geometrical parameters of the molded part is fundamental to approach the product design, which is conditioned severely by processing capabilities. In this work, the maximum flow length is obtained for different geometries of an overmolded rectangular stiffener grid of carbon fiber filled polyether eter ketone (CF-PEEK) using the software Moldflow© Adviser© for calculations. Value of maximum flow length is provided as a function of cross section aspect ratio for gate diameters between 0.8 mm and 1.4 mm and cross section areas from 10 to 50 mm2. An exponential decrement of maximum flow length has been observed with the increment of aspect ratio of the cross section as well as a linear increment with the increment of cross section area. Gate diameter variation is slightly related with maximum flow length for the simulated values. These results provide a support tool for geometry sizing in overmolded rectangular grid parts at preliminary design stages.

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Ishikawa, Takashi, Yoichi Hayashi, Sunao Sugimoto, Masamichi Matsushima, and Kazuaki Amaoka. "Development and test results of full CF/PEEK (APC-2) horizontal stabilizer models - Basis for SST structure." In Aircraft Engineering, Technology, and Operations Congress. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-3931.

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Li, Lei, Song-Lin Nie, Zhen-Hua Zhang, and Wu-Ju Liao. "COMPARATIVE INVESTIGATION ON TRIBOLOGICAL PROPERTIES OF LOW-PRESSURE NITROGEN 17-4PH/316/316L SLIDING AGAINST CF/PTFE/GRAPHITE FILLED PEEK UNDER SYNTHETIC SEAWATER LUBRICATION." In 2015 International Conference on Energy and Mechanical Engineering. WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789814749503_0078.

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Aulich, Anne-Laure, Daniel Goerke, Michael Blocher, Eberhard Nicke, and Frank Kocian. "Multidisciplinary Automated Optimization Strategy on a Counter Rotating Fan." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94259.

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Multidisciplinary automated optimization processes are nowadays essential to obtain optimal turbomachinery components. However, an extremely large number of free variables, constraints and objectives results in a complex task. This paper presents an optimization strategy developed to handle with different constraints, design goals concerning aerodynamic, mechanic and aeroelastic, and finally manufacturing aspects. This strategy has been applied to a counter rotating integrated shrouded propfan, which is developed within a DLR-project. Both rotors have been already aerodynamic optimized in a first design phase coupled with a mechanical analysis of the CF/PEEK blades with titanium clevises. Detailed analysis showed high displacements and unreliable Campbell-Diagrams. To reach a rig-ready design a new optimization strategy has been developed. The optimizations feature more than hundred free variables, two objective functions, as well as a high number of aerodynamic and mechanical constraints. The mechanical behavior of the blades has been improved step by step in four successive aeromechanical optimizations. To secure the improvement obtained in one optimization, their objective functions become constraints in the next step. In the first optimization, the efforts have been focused on reducing the maximal absolute displacements in several operation points. In the second one, the scattering of the maximal absolute displacements between several operation points have been reduced. In the third optimization, the Campbell-Diagrams have been additionally optimized. Although the aerodynamic performance remained on a good level, it decreased a little bit in this design phase. For this reason, an additional fourth optimization was performed with the objective to increase the fan efficiency by keeping the good mechanical behavior reached before. The presented optimization strategy has been successfully completed and the best members obtained show an almost satisfactory mechanical feasibility in view of the planned rig test.

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