Damage to aircraft composite structures caused by directed energy system: A literature review

Zhang, Y.X.; Zhu, Zhi; Joseph, R Simon; Shihan, Isfakul Jamal

doi:10.1016/j.dt.2020.08.008

Cited by 26 publications

(8 citation statements)

References 45 publications

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“…The high specific strength, specific stiffness, and excellent designability characteristics of laminated CFRP can significantly improve the performance of high-speed flights such as missiles and unmanned aerial vehicles. However, the thermal damage caused by laser irradiation is a significant threat when the high-power laser becomes an important intercept strategy [ 1 , 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Instantaneous Ablation Behavior of Laminated CFRP by High-Power Continuous-Wave Laser Irradiation in Supersonic Wind Tunnel

Wang

Song

et al. 2023

Materials

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Experimental and numerical investigations of the instantaneous ablation behavior of laminated carbon fiber-reinforced polymer (CFRP) exposed to an intense continuous-wave (CW) laser in a supersonic wind tunnel are reported. We establish an in situ observation measurement in the experiments to examine the instantaneous ablation behavior. The surface recession depth is calculated by using the Particle Image Velocimetry (PIV) method, taking the ply angle of laminated CFRP as a reference. A coupled thermal-fluid-ablation numerical model incorporating mechanisms of oxidation, sublimation, and thermomechanical erosion is developed to solve the ablation-through problem of multilayer materials. The results show that the laser ablation depth is related to the laser power density, airflow velocity and airflow mode. Thermomechanical erosion is the primary ablation mechanism when the surface temperature is relatively low and the cavity flow mode is a closed cavity flow. When the surface temperature reaches the sublimation of carbon and the airflow mode is transformed to open cavity flow, sublimation plays a dominant role and the ablation rate of thermomechanical erosion gradually decreases.

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Section: Introductionmentioning

confidence: 99%

Instantaneous Ablation Behavior of Laminated CFRP by High-Power Continuous-Wave Laser Irradiation in Supersonic Wind Tunnel

Wang

Song

et al. 2023

Materials

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“…Composite structures have the advantages of high specific strength, high specific stiffness and good designability. They have been widely used in the structural design of civil aircraft recently [ 1 , 2 , 3 ]. As a longitudinal member of the fuselage structure, the truss mainly bears the lateral force caused by the bending of the fuselage, and its compressive bearing capacity has an important influence on the stability and post-buckling bearing capacity of the integrally reinforced panel composed of the truss and the skin [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Failure Analysis of Hat-Stringer-Stiffened Aircraft Composite Panels under Four-Point Bending Loading

Gong

Gao

et al. 2022

Materials

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Hat-stringer-stiffened composite panels have been widely used in aircrafts. Accurate failure analysis of them is important for the safety and integrity of the fuselage. During the service period, these panels will bear not only the lateral force caused by the bending of fuselage, but also the radial pressure caused by the internal and external differential pressure during the take-off and landing of the aircraft. However, the latter case lacks investigation. Therefore, experimental and numerical studies for the static and fatigue failure of hat-stringer-stiffened composite panels under four-point bending loading have been performed in this work. To accurately predict the fatigue failure, a novel theoretical model has been proposed based on the fatigue damage theory. In addition, a user-defined subroutine USDFLD is developed for the implementation of the proposed theoretical model in Abaqus. Experimental results show that the main failure modes are the delamination of the skin and debonding between the girder flange and the skin. The experimental average value of the initial debonding load and displacement in static tests are 897.3 N and 10.8 mm, respectively. Predictions exhibit good agreement with experimental results with relative errors within 10%. Experimental average fatigue failure life of the specimens is 33,085 cycles, which is also close to the prediction with relative errors within 10%. This indicates the reliability and applicability of the established theoretical model and numerical method for predicting the failure of hat-shaped girder structures.

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“…Importantly, the requested resources need to be provided to the respective battle clusters from the main base station (BS) as early as possible. Conventionally, these resources are carried using trucks or other heavy costly vehicles, air, sea ferries etc [5,6,7,8]. But the process is quite difficult, time consuming, risky and costly approach.…”

Section: Introductionmentioning

confidence: 99%

Unmanned Aerial Vehicle assisted Intelligent approach to Manage the Resources for Defense Systems

Biswas

Anirudh

Raj

et al. 2022

Preprint

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Generally, resources are transported through manned transportation in a distant war zones. The manual transportation of the resources involve various constrains such as time consuming, risk, cost. Efficient management of these limited resources is one of the primary desiring factors to decide the fate of war. Compu-tationally, resource management is an non-deterministic polynomial hard (NP-hard) problem. In this work, several novel resources management algorithms are designed for defence systems by utilization the intelligence of UAV and Jaccard coefficient and Overlap coefficient mathematical support. The intelligent use of Unmanned Aerial Vehicles (UAVs) facilitate resources management in faster, less risky and efficient manner. The proposed UAV assisted resource management algorithms are analyzed and validated over various synthetic simulated war going situations data sets. The proposed algorithms show significant performance in the total service time, utilization of deployed UAVs and number of flights.

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Damage to aircraft composite structures caused by directed energy system: A literature review

Cited by 26 publications

References 45 publications

Instantaneous Ablation Behavior of Laminated CFRP by High-Power Continuous-Wave Laser Irradiation in Supersonic Wind Tunnel

Instantaneous Ablation Behavior of Laminated CFRP by High-Power Continuous-Wave Laser Irradiation in Supersonic Wind Tunnel

Failure Analysis of Hat-Stringer-Stiffened Aircraft Composite Panels under Four-Point Bending Loading

Unmanned Aerial Vehicle assisted Intelligent approach to Manage the Resources for Defense Systems

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