Geometry and Size Effects in Response of Composite Structures Subjected to Water-Based Impulsive Loading

2017 ◽  
pp. 443-470
Author(s):  
Siddharth Avachat ◽  
Tao Qu ◽  
Min Zhou
Keyword(s):  
Size Effects ◽  
Composite Structures ◽  
Impulsive Loading ◽  
Water Based

Size Effects in the Impact of Carbon Fiber Reinforced Composite Structures

2018 ◽  
Vol 789 ◽  
pp. 155-160
Author(s):  
Yi Ou Shen ◽  
Yan Li
Keyword(s):  
Size Effects ◽  
Composite Structures ◽  
Impact Force ◽  
Flexural Rigidity ◽  
Experimental Results ◽  
Target Size ◽  
Mass Model ◽  
Energy Impact ◽  
Maximum Impact Force ◽  
The Impact

In this study, target size effects in the low energy impact response of plain CFRP plateswere investigated. It was found that increase the target size leads to a reduction in the maximumimpact force recorded during the test. This is due to the reduction on flexural rigidity of the largerpanels. The experimental results indicated that at energies above the first failure threshold, themaximum impact force does not coincidence with the predicting value. Two mathematical modelswere used to predict the maximum impact force including single degree of freedom (SDOF)spring-mass model and Energy-Balance (E-B) model. The predicting results were then comparedwith the experimental results, and both of the two models show good agreement with theexperimental results in elastic deformation region. In addition, the level of agreement between thepredictions and the experimental results indicate that both models are capable of modelling theimpact response of these CFRP panels at elastic regime.

Dynamic response testing of columnar composite structures subjected to impulsive loading

1987 ◽  
Vol 22 (2) ◽  
pp. 625-628 ◽  
Author(s):  
S. Yazdani-Ardakani ◽  
S. K. Kesavan ◽  
M. L. Chu
Keyword(s):  
Dynamic Response ◽  
Composite Structures ◽  
Impulsive Loading ◽  
Response Testing

Bio-inspired composite structures subjected to underwater impulsive loading

2014 ◽  
Vol 82 ◽  
pp. 134-139 ◽  
Author(s):  
Phuong Tran ◽  
Tuan Duc Ngo ◽  
Priyan Mendis
Keyword(s):  
Composite Structures ◽  
Impulsive Loading ◽  
Underwater Impulsive Loading

scholarly journals Response of Cylindrical Composite Structures Subjected to Underwater Impulsive Loading: Experimentations and Computations

2017 ◽  
Vol 139 (2) ◽  
Author(s):  
Tao Qu ◽  
Siddharth Avachat ◽  
Min Zhou
Keyword(s):  
Damage Evolution ◽  
Composite Structures ◽  
High Speed ◽  
Blast Resistance ◽  
Equal Mass ◽  
Impulsive Loading ◽  
Structural Deformation ◽  
Damage And Failure ◽  
Impulsive Loads ◽  
Thin Walled

The dynamic response of both thick-walled and thin-walled cylindrical composite structures subjected to underwater impulsive loads is analyzed. In the case of thick-walled structures, a novel experimental setup, the underwater shock loading simulator (USLS), is used to generate the impulsive loads. Deflection and core compression are characterized using high-speed digital imaging. The experiments are supported by fully dynamic numerical calculations which account for fluid–structure interactions (FSIs) and damage and failure mechanisms in the materials. The analysis focuses on the effect of varying structural attributes and material properties on load-carrying capacity, deformation mechanisms, and damage. Results show that cylindrical sandwich structures have superior blast-resistance than cylindrical monolithic structures of equal mass with only relatively minor increases in wall thickness. In the case of thin-walled structures, a unique computational framework based on a coupled Eulerian–Lagrangian (CEL) approach is developed to study the structural collapse and damage evolution under large impulsive loads which induces an implosion event. Simulations are carried out for a range of hydrostatic pressure and impulsive load intensity, with different loading configurations. Ply level stress analysis provides an insight on the stress–structural deformation–damage evolution relationship during the severe explosion-induced implosion event. The experiments, computations, and structure–performance relations developed in the current study offer approaches for improving the blast-mitigation capabilities of cylindrical composite sections in critical parts of marine structures, such as the keel, hull, and pipes.

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