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Shape Analysis for Composite Data Structures [chapter]

Josh Berdine, Cristiano Calcagno, Byron Cook, Dino Distefano, Peter W. O'Hearn, Thomas Wies, Hongseok Yang
Computer Aided Verification  
We propose a shape analysis that adapts to some of the complex composite data structures found in industrial systems-level programs.  ...  In order to evaluate the proposed approach for realistic programs we have performed experiments on examples drawn from device drivers: the analysis proved safety of the data structure manipulation of several  ...  We are grateful to the CAV reviewers for detailed comments which helped us to improve the presentation. The London authors were supported by EPSRC.  ... 
doi:10.1007/978-3-540-73368-3_22 dblp:conf/cav/BerdineCCDOWY07 fatcat:647snd74onh2lflgsmqbjadkya

Recent advances in sharing standardized STEP composite structure design and manufacturing information

Keith A. Hunten, Allison Barnard Feeney, Vijay Srinivasan
2013 Computer-Aided Design  
This paper describes recent advances that led to the development of ISO 10303-209 data models for composite structural shape and composition.  ...  This standard, part of the family of standards commonly known as the Standard for Exchange of Product model data (STEP), is considered essential for improving the design, analysis, and manufacturing productivity  ...  for composite structural shape and composition in Section 2.  ... 
doi:10.1016/j.cad.2013.05.001 fatcat:7p6bi6d6unfmdnofhllztvqk5m

DAMAGE DETECTION IN COMPOSITE BEAM USING NUMERICAL MODAL ANALYSIS

Ramanamurthy E.V.V, Chandrasekaran K
2008 International Journal on Design and Manufacturing Technologies  
Due to refined analysis of FE approach, all the algorithms are viable of detecting the damage using the FE data.  ...  Cost-effective and reliable damage detection is critical for the utilization of composite materials.  ...  By using mode shapes data the damage detection was carried out by using damage algorithms (explained in the previous section). The numerical analysis was considered only for bending mode shapes.  ... 
doi:10.18000/ijodam.70025 fatcat:i5wtlhgwazaddb3gbyceufl5vu

Impact Analysis of Composite Repair Patches of Different Shapes at Low Velocities for Aircraft Composite Structures

Gangadharan S, Baliga SV, Sonawane NH
2016 Journal of Aeronautics & Aerospace Engineering  
The FEA results were validated with the experimental data and an approach to model an ideal composite patch shape was conducted.  ...  The effectiveness of finite element analysis of low velocity impact on aircraft composite structures is demonstrated.  ...  Acknowledgement The authors of this paper would like to thank Embry-Riddle Aeronautical University, for providing the resources for this research.  ... 
doi:10.4172/2168-9792.1000173 fatcat:tlbpmk45v5bhlemz24yk47djiq

Vibration Characteristics of Composite Pan Blades and Comparison with Measured Data

C. C. Chamis
1977 Journal of Aircraft  
A type of advanced fiber composite suitable for a particular application involving a high-tip-speed fan blade is described in Ref. 1, and the computerized analysis capability for structurally analyzing  ...  to build confidence in the analysis method; 2) selection of ply-lay-up sequences for altering blade structural stiffness relative to tip displacements, vibration frequencies, and vibration mode shapes  ... 
doi:10.2514/3.58835 fatcat:dgwtcdhz5nhvfehas74j6rxfpa

Page 644 of Journal of Aircraft Vol. 14, Issue 7 [page]

1977 Journal of Aircraft  
to build confidence in the analysis method; 2) selection of ply-lay-up sequences for altering blade structural stiffness relative to tip displacements, vibration frequencies, and vibration mode shapes  ...  A type of advanced fiber composite suitable for a particular application involving a high-tip-speed fan blade is described in Ref. 1, and the computerized analysis capability for structurally analyzing  ... 

Pilot Study on the Vibration Behavior of TCC Laminated Deck Systems

Nur Emilia Mat Gadami, Faculty of Civil Engineering and Built Environment, Universiti Tun Hussien Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, MALAYSIA, N. H Abd Ghafar, David Yeoh Eng Chuan, Muhammad Imran Rahimi, Nur Azmina Zafira Abd Aziz, Faculty of Civil Engineering and Built Environment, Universiti Tun Hussien Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, MALAYSIA, Faculty of Civil Engineering and Built Environment, Universiti Tun Hussien Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, MALAYSIA, Faculty of Civil Engineering and Built Environment, Universiti Tun Hussien Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, MALAYSIA, Faculty of Civil Engineering and Built Environment, Universiti Tun Hussien Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, MALAYSIA
2021 International Journal of Integrated Engineering  
The shaker was placed on a laminated deck as vertical force and 15 accelerometers were used as output data collectors. Me´scope and SAP2000 package were used for data analysis.  ...  The timber concrete composite (TCC) deck system is a new technology that consists of timber and concrete composite structures but remains uncommon in Malaysia.  ...  The first mode shape for T2 with a length of 3.6 m and a concrete topping of 0.065 m is 16.9 Hz, which is greater than 8 Hz or the limit for a timber concrete composite structure.  ... 
doi:10.30880/ijie.2021.13.03.030 fatcat:jcp7c4x4f5awzormit2qzhol4u

Partial Delamination Detection and Quantification in Composite Laminates Using Laser Doppler Vibrometer [chapter]

Yashdeep P. Nimje, Gangadharan Raju
2017 Advances in Structural Integrity  
The obtained elastic properties of GFRP were then used in FE analysis for performing modal analysis of composite structures.  ...  Material characterization of composite structure Grediac and Paris. [38] proposed a dynamic method for the characterization of the composite structure. For removing the noisy data.  ... 
doi:10.1007/978-981-10-7197-3_43 fatcat:ajes2lkb4bbzhhin66qehi6kqu

Experimental and Numerical Analysis of Clamped-Clamped Composite Beam

Soham Sunil Vader, V. A. Raikar
2017 International Journal of Engineering Research and  
The presence of cracks serves as a threat to the performance of structures and it affects the vibration signatures (Natural frequencies and mode shapes).  ...  The presence of crack in a structural member causes change in stiffness of that structure.  ...  Fig. 12 12 Deformed shape for 1 st mode of vibration of composite clampedclamped beam without crack.  ... 
doi:10.17577/ijertv6is040630 fatcat:rflyfdve65ahjad35n7lr4c5oq

Nondestructive Damage Assessment of Composite Structures Based on Wavelet Analysis of Modal Curvatures: State-of-the-Art Review and Description of Wavelet-Based Damage Assessment Benchmark

Andrzej Katunin
2015 Shock and Vibration  
Considering that composites are often used for responsible elements, for example, parts of aircrafts and other vehicles, it is extremely important to maintain them properly and detect, localize, and identify  ...  The application of composite structures as elements of machines and vehicles working under various operational conditions causes degradation and occurrence of damage.  ...  The author also would like to thank two anonymous reviewers for valuable comments and suggestions which allow improving significantly this paper.  ... 
doi:10.1155/2015/735219 fatcat:ndycdbkzh5f23lnlui54ywdtee

Residual life estimation of healthy and cracked composite beam using experimental and numerical modal analysis methods

Gedela Ramprasad, Shinigam Ramakrishna
2020 Journal of Mechanical and Energy Engineering  
Composite structures are used for naval applications like ship hulls and marine propellers.  ...  In most of the industries, composite structural health analysis using experimental and numerical model are available for damage detection and estimate the residual life of composite beams.  ...  Mode shapes for healthy composite beam Fig. 10. Mode shapes for cracked composite beam Tab. 4. Natural frequency of cracked composite Tab. 5.  ... 
doi:10.30464/jmee.2020.4.2.127 fatcat:vbfrrwit35b4njvjet77otpnpy

Computational adaptive structure assessment of c-130 flaperon

Levon Minnetyan, Frank Abdi, Christos C. Chamis, Dade Huang
2009 Procedia Engineering  
Computational software for composites has been enhanced to simulate the shape changes for piezo-electrically controlled structures.  ...  The piezo-adaptive shape simulations are verified by comparison with selected closed form solutions and test data from the literature.  ...  Computational software for composites has been enhanced to simulate the shape changes for piezo-electrically controlled morphing structures [2] .  ... 
doi:10.1016/j.proeng.2009.06.013 fatcat:dav5m7r7xzgtnpehljhmua2lsi

Applied Holographic Interferometry as a Nondestructive Method for the Dynamic and Modal Analysis of an Advanced Graphite-Epoxy Composite Structure [chapter]

Howard Fein
1997 Review of Progress in Quantitative Nondestructive Evaluation  
analytical methods for vibration, motion, and structural analysis.  ...  ACKNOWLEDGMENTS The work described in this paper was conducted at the Polaris Research Group Laboratory by the author on an advanced composite part in cooperation with W estinghouse Naval Systems Division  ...  RESULTS Data has been taken for an advanced polymer matrix composite structure assembly.  ... 
doi:10.1007/978-1-4615-5947-4_253 fatcat:njnxmy3op5ftdhw4ji5ommzozy

Dynamic analysis for delamination detection in carbon fiber composite beam

J Sadarang, S Nayak, G Nayak, I Panigrahi, R K Nayak
2018 IOP Conference Series: Materials Science and Engineering  
There are various non-destructive testing methods like ultrasonic inspection, thermography, X-Ray Diffraction and X-Ray Radiography etc for determination of the defects in the composite structure which  ...  Delaminations in the composite structure are the main causes of structural failure. It not only degrades the strength and durability of the composites but also makes it prone to failure.  ...  mode shapes are obtained as given below: For mode 1 fn1 = 42.691Hz, for mode 2 fn2 = 267.561Hz, for mode 3 fn3 = 749.256Hz.  ... 
doi:10.1088/1757-899x/402/1/012143 fatcat:gk2pfzeewrfizf4mc44rwjkw7i

Active Vibration Damping of Composite Beam using Smart Sensors and Actuators

G. Song, P. Z. Qiao, W. K. Binienda, G. P. Zou
2002 Journal of Aerospace Engineering  
Both theoretical and numerical ͑finite-element analysis͒ studies of the laminated composite beam are conducted to reveal the beam's fundamental modal frequencies and modal shapes.  ...  The apparatus consists of a voltage amplifier and a data acquisition and real-time control system, in addition to the composite beam with bonded piezoelectric ceramic sensors and actuators.  ...  Uhrain IV for his assistance in fabrication of the laminated composite beam, and Jialai Wang for the modal analyses using ANSYS.  ... 
doi:10.1061/(asce)0893-1321(2002)15:3(97) fatcat:iqhywpxcbjcnbpmb6gkzvjsg7e
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