Effect of Nylon-66 nano-fiber interleaving on impact damage resistance of epoxy/carbon fiber composite laminates

2010 ◽  
Vol 92 (6) ◽  
pp. 1432-1439 ◽  
Author(s):  
Paul Akangah ◽  
Shivalingappa Lingaiah ◽  
Kunigal Shivakumar
Keyword(s):  
Carbon Fiber ◽  
Composite Laminates ◽  
Impact Damage ◽  
Fiber Composite ◽  
Carbon Fiber Composite ◽  
Nylon 66 ◽  
Damage Resistance ◽  
Nano Fiber

Analysis of Patch Bonded Repair to Carbon Fiber Composite Laminates with Low Velocity Impact Damage

2011 ◽  
Vol 335-336 ◽  
pp. 226-229
Author(s):  
Lun Wang ◽  
Wan Lin Zhou ◽  
Xue Gang Shi
Keyword(s):  
Carbon Fiber ◽  
Composite Laminates ◽  
Impact Damage ◽  
Fiber Composite ◽  
Element Model ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Carbon Fiber Composite ◽  
Velocity Impact ◽  
Bonded Repair

In this paper, low-velocity impact residual tensile strength of carbon fiber composite laminates are investigated by experiment. The triple-plate-string-element finite element model was used to calculate the strength of repaired structures of the damage. The corresponding strength tests were conducted to verify the computational results. According to the computational and experimental results, the influence of the repair parameters on the repair efficiency was analyzed, such as the overlap length and the thickness of the patch.

Residual thermal stresses in bismaleimide/carbon fiber composite laminates

1995 ◽  
Vol 16 (4) ◽  
pp. 276-283 ◽  
Author(s):  
Luca Di Landro ◽  
Alberto Palonca ◽  
Giuseppe Sala
Keyword(s):  
Carbon Fiber ◽  
Composite Laminates ◽  
Thermal Stresses ◽  
Fiber Composite ◽  
Carbon Fiber Composite

Numerical and experimental evaluation of mechanical performance of the multifunctional energy storage composites

2021 ◽  
pp. 002199832110495
Author(s):  
Yinan Wang ◽  
Fu-Kuo Chang
Keyword(s):  
Energy Storage ◽  
Carbon Fiber ◽  
Composite Laminates ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Fiber Composite ◽  
Mechanical Damage ◽  
Experimental Tests ◽  
Structural Element ◽  
Carbon Fiber Composite

This work presents numerical simulation methods to model the mechanical behavior of the multifunctional energy storage composites (MESCs), which consist of a stack of multiple thin battery layers reinforced with through-the-hole polymer rivets and embedded inside carbon fiber composite laminates. MESC has been demonstrated through earlier experiments on its exceptional behavior as a structural element as well as a battery. However, the inherent complex infrastructure of the MESC design has created significant challenges in simulation and modeling. A novel homogenization technique was adopted to characterize the multi-layer properties of battery material using physics-based constitutive equations combined with nonlinear deformation theories to handle the interface between the battery layers. Second, mechanical damage and failure modes among battery materials, polymer reinforcements, and carbon fiber-polymer interfaces were characterized through appropriate models and experiments. The model of MESCs has been implemented in a commercial finite element code in ABAQUS. A comparison of structural response and failure modes from numerical simulations and experimental tests are presented. The results of the study showed that the predictions of elastic and damage responses of MESCs at various loading conditions agreed well with the experimental data. © 2021

Carbon Fiber Composite Beam Damage Model Identification

2016 ◽  
Author(s):  
Alexander H. Pesch ◽  
Ryan J. Madden ◽  
Richard E. Martin ◽  
Jerzy T. Sawicki
Keyword(s):  
Carbon Fiber ◽  
Composite Beam ◽  
Impact Damage ◽  
Fiber Composite ◽  
Damage Model ◽  
Model Identification ◽  
Experimental System ◽  
Modal Testing ◽  
Carbon Fiber Composite ◽  
Localized Damage

The technique of model-based identification is proposed to extract a model for damage in composite materials from experimental data. The proposed method is demonstrated on a unidirectional carbon fiber reinforced polymer (CFRP) beam. Impact damage is seeded in the CFRP beam using a spherical punch, causing localized damage. The specimen is evaluated through modal testing before and after the damage is seeded, with the healthy case modeled using the FEM. Finally, a virtual controller is found which eliminates error in response between the healthy model and damaged experimental system. The virtual controller, being in feedback with the healthy model at the FE node where the damage occurs, reflects the effect of the localized damage. It is found that the seeded impact damage reduces stiffness and is a source of damping inside the composite beam. Interpretation of the local damage is made through the curve fitting of the identified dynamics. To confirm the efficacy of the fit, a closed-loop is made with the healthy model which is then compared to the data from the damaged system.

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