scholarly journals Design and Test of a Student Hybrid Rocket Engine with an External Carbon Fiber Composite Structure

Aerospace ◽  
2020 ◽  
Vol 7 (5) ◽  
pp. 57 ◽  
Author(s):  
Francesca Heeg ◽  
Lukas Kilzer ◽  
Robin Seitz ◽  
Enrico Stoll
Keyword(s):  
Carbon Fiber ◽  
Fiber Composite ◽  
Rocket Engine ◽  
Low Complexity ◽  
Hybrid Rocket ◽  
Carbon Fiber Composite ◽  
Rocket Propulsion ◽  
Total Impulse ◽  
Hybrid Rocket Engine ◽  
The Impact

The development of hybrid rockets offers excellent opportunities for the practical education of students at universities due to the high safety and relatively low complexity of the rocket propulsion system. During the German educational program Studentische Experimental-Raketen (STERN), students of the Technische Universität Braunschweig obtain the possibility to design and launch a sounding rocket with a hybrid engine. The design of the engine HYDRA 4X (HYbridDemonstrations-RaketenAntrieb) is presented, and the results of the first engine tests are discussed. The results for measured regression rates are compared to the results from the literature. Furthermore, the impact of the lightweight casing material carbon fiber-reinforced plastic (CFRP) on the hybrid engine mass and flight apogee altitude is examined for rockets with different total impulse classes (10 to 50 kNs). It is shown that the benefit of a lightweight casing material on engine mass decreases with an increasing total impulse. However, a higher gain on apogee altitude, especially for bigger rockets with a comparable high total impulse, is shown.

scholarly journals Design and Test of a Student Hybrid Rocket Engine with an External Carbon Fiber Composite Structure

2020 ◽  
Author(s):  
Francesca Heeg
Keyword(s):  
Fiber Composite ◽  
Rocket Engine ◽  
Low Complexity ◽  
Hybrid Rocket ◽  
Carbon Fiber Composite ◽  
Rocket Propulsion ◽  
Total Impulse ◽  
Hybrid Rocket Engine ◽  
Education Of Students ◽  
The Impact

The development of hybrid rockets offers excellent opportunities for the practical education of students at universities due to a high safety and a relatively low complexity of the rocket propulsion system. During the German educational program STERN, students of the Technische Universität Braunschweig obtain the possibility to design and launch a sounding rocket with a hybrid engine. The design of engine HYDRA 4X is presented and results of first engine tests are discussed. Results for measured regression rates are compared to results from literature. Furthermore, the impact of the lightweight casing material CFRP on the hybrid engine mass and flight apogee altitude is examined for rockets with different total impulse classes (10 to 50 kNs). It is shown that the benefit of a lightweight casing material on engine mass decreases with an increasing total impulse. However, a higher gain on apogee altitude, especially for bigger rockets with a comparable high total impulse is shown.

Full Frontal Crashworthiness of Carbon Fiber Composite Front Bumper Crush Can (FBCC) Structures

2017 ◽  
Author(s):  
Y. Dixit ◽  
P. Begeman ◽  
G. S. Dhaliwal ◽  
G. Newaz ◽  
D. Board ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
High Speed ◽  
Fiber Composite ◽  
Video Tracking ◽  
Carbon Fiber Composite ◽  
Component Level ◽  
Frontal Crash ◽  
Impact Performance ◽  
Testing Method ◽  
The Impact

This research study highlights the testing method and relevant results for assessing impact performance of a carbon fiber composite front bumper crush can (FBCC) assembly subjected to full frontal crash loading. It becomes extremely important to study the behavior of lightweight composite components under a crash scenario in order to apply them to automotive structures to reduce the overall weight of the vehicle. Computer-aided engineering (CAE) models are extremely important tools to virtually validate the physical testing by assessing the performances of these structures. Due to lack of available studies on carbon fiber composite FBCCs assemblies under the frontal crash scenario, a new component-level test approach would provide assistance to CAE models and better correlation between results can be made. In this study, all the tests were performed by utilizing a sled-on-sled testing method. An extreme care was taken to ensure that there is no bottoming-out force for this type of test while adjusting the impact speed of sled. Full frontal tests on FBCC structures were conducted by utilizing five high-speed cameras (HSCs), several accelerometers and a load wall. Excellent correlation was achieved between video tracking and accelerometers results for time histories of displacement and velocity. The standard deviation and coefficient of variance for the energy absorbed were very low suggesting the repeatability of the full frontal tests. The impact histories of FBCC specimens were consistent and in excellent agreement with respect to each other. Post-impact photographs showed the consistent crushing of composite crush cans and breakage of the bumper beam from middle due to the production of tensile stresses stretched caused by straightening of the bumper curvature after hitting the load wall.

Check on Structural Strength of Carbon Fiber Composite Field Kitchen Units

2013 ◽  
Vol 690-693 ◽  
pp. 1810-1814
Author(s):  
Xiang Hong Zhang ◽  
Han Yang ◽  
Si Lian Sheng ◽  
Zhan Sheng Gong
Keyword(s):  
Carbon Fiber ◽  
Structural Strength ◽  
Fiber Composite ◽  
Simulation Test ◽  
Carbon Fiber Composite ◽  
Element Analysis ◽  
Composite Field ◽  
Mechanics Analysis ◽  
Box Structure ◽  
The Impact

Field kitchen units is used to guarantee the diet in field operations for troops, a set of field kitchen units includes 3 boxes and 1 tent for kitchen work, cooking staple and non-staple food for 150 people in 1 hour. The weight of units has to be reduced so as to guarantee its application in Tibetan plateau of 5000m as it can be loaded on the vehicle by 2-soldier moving laterally or 3-soldier lifting. Mechanics analysis is carried out in this paper for the structural of latest applied carbon fiber composite units, in an effort to ensure the box can bear the impact generated in the course of transportation and loading, software LS-DYNA is applied to make finite-element analysis to simulate drop simulation test, checking if the strength of box structure reaches the designed requirements.

Characterization and Modeling of Anisotropic Thermal Conductivity in Polymer Composites

2006 ◽  
Author(s):  
Raj Bahadur ◽  
Avram Bar-Cohen
Keyword(s):  
Thermal Conductivity ◽  
Carbon Fiber ◽  
Polymer Matrix Composites ◽  
Fiber Composite ◽  
Fiber Material ◽  
Laser Flash ◽  
Matrix Composites ◽  
Carbon Fiber Composite ◽  
Anisotropic Thermal Conductivity ◽  
The Impact

The thermophysical properties of a commercially available Polyphenylene Sulphide (PPS)-carbon fiber composite material are experimentally characterized and used to validate application of the Nielsen thermal conductivity model to this category of polymer matrix composites. The PPS-fiber thermal conductivity was measured in the three orthogonal directions, using the laser flash thermal diffusivity method, and found to display significant anisotropy. Thermal conductivity predictions based on the Nielsen model, and using E-SEM measured values of fiber dimensions and fiber orientation and carbon fiber mass content determined from TGA analysis, were found to be within 5% of the corresponding measurements. The close agreement between predictions and measurements permitted the determination of the morphological influence of fiber material, volume content and orientation, and resin and fiber thermal conductivities, on thermal conductivity to be parametrically investigated and optimized for a given formulation. The impact of this optimization on the thermal performance of a PPS-fiber pin fin is described.

Mechanical Analyses of Repeatedly Processed Polypropylene/Carbon Fiber Composite Plates

2010 ◽  
Vol 97-101 ◽  
pp. 1794-1796 ◽  
Author(s):  
Ching Wen Lou ◽  
Kuo Chen Chang ◽  
Chien Teng Hsieh ◽  
Tung Lung Kuo ◽  
Jia Horng Lin
Keyword(s):  
Mechanical Property ◽  
Carbon Fiber ◽  
Composite Plate ◽  
Fiber Composite ◽  
Composite Plates ◽  
Carbon Fiber Composite ◽  
Three Point Bending ◽  
Single Screw Extrusion ◽  
The Times ◽  
The Impact

Polymer blending was used by adding different proportions (5, 10, 15 and 20 wt %) of the short carbon fiber into the high impact polypropylene (PP) matrix to reinforce the matrix’s mechanical property. The carbon fiber was melt blended with the PP matrix. The mixture was repeatedly processed by the single-screw extrusion into chips, which later became the composite plate by the injection molding machine. In this study, the effect of the repeatedly process on the PP/Carbon fiber composite plate’s mechanical property was examined. The tensile strength of the mixture having one process and six processes were 886 N and 857 N respectively. The impact strength of the composite plates processed for once was 334 J/m while that of the plates processed for six times was 325 J/m. The three-point bending of the composite plate processed once was 30 MPa when that of the plate processed for six times was 28 MPa. The more the times of the process, the weaker the composite plate’s mechanical property became. The carbon fiber was used to reinforce PP’s mechanical property. This study will be applied in the industry.

scholarly journals The impact of specific surface area on the retention of deuterium in carbon fiber composite materials

2009 ◽  
Vol 84 (2-6) ◽  
pp. 1068-1071 ◽  
Author(s):  
R.D. Kolasinski ◽  
K.R. Umstadter ◽  
J.P. Sharpe ◽  
R.A. Causey ◽  
R.J. Pawelko ◽  
...  
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Fiber Composite ◽  
Carbon Fiber Composite ◽  
The Impact ◽  
Fiber Composite Materials

Damage tolerance characterization of carbon fiber composites at a component level: A thermoset carbon fiber composite

2017 ◽  
Vol 52 (1) ◽  
pp. 37-46 ◽  
Author(s):  
Xiaosong Huang ◽  
Selina Zhao
Keyword(s):  
Carbon Fiber ◽  
Impact Damage ◽  
Fiber Composite ◽  
Energy Levels ◽  
Carbon Fiber Composites ◽  
Compression Tests ◽  
Carbon Fiber Composite ◽  
Component Level ◽  
Residual Properties ◽  
The Impact

This work focuses on the impact damage evaluation of a carbon fiber-reinforced thermoset composite at a component level (beams) as an effort to develop the service strategies for this class of materials. The beams were impact damaged at a variety of energy levels, and the pulse thermography nondestructive evaluation approach was used to characterize the damaged areas. The damaged beams were subjected to compression tests to evaluate their residual properties. As expected, both the beam maximum load and residual stiffness decreased with the increase in damage size. The damage growth rates under different load levels were investigated in fully reversed torsional fatigue tests. The fatigued beams were also characterized for their residual compression properties, which were then compared with those of the unfatigued beams. The results will be used to develop computer-aided engineering models to predict the residual strength and fatigue life of damaged composite components.

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