Numerical and experimental investigation of simply supported steel beams under drop‐weight impact tests

ce/papers ◽  
2019 ◽  
Vol 3 (3-4) ◽  
pp. 803-809
Author(s):  
Marina D'Antimo ◽  
Massimo Latour ◽  
Jean‐Pierre Jaspart ◽  
Jean‐François Demonceau
Keyword(s):  
Experimental Investigation ◽  
Steel Beams ◽  
Simply Supported ◽  
Impact Tests ◽  
Drop Weight ◽  
Weight Impact

scholarly journals Analysis of Impact Characteristics and Detection of Internal Defects for Unidirectional Carbon Composites with Respect to Fiber Orientation

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 203
Author(s):  
Sun-ho Go ◽  
Alexandre Tugirumubano ◽  
Hong-gun Kim
Keyword(s):  
Carbon Fiber ◽  
Impact Test ◽  
Carbon Fiber Composites ◽  
Internal Defects ◽  
Impact Tests ◽  
Drop Weight ◽  
Weight Impact ◽  
Fibers Orientation ◽  
Lock In ◽  
The Impact

With the increasing use of carbon fiber reinforced plastics in various fields, carbon fiber composites based on prepregs have attracted attention in industries and academia research. However, prepreg manufacturing processes are costly, and the strength of structures varies depending on the orientation and defects (pores and delamination). For the non-contact evaluation of internal defects, the lock-in infrared thermography was proposed to investigate the defects in the composites subjected to the compression after impact test (CAI). The drop-weight impact test was conducted to study the impact behavior of the composites according to fibers orientation for composite fabricated using unidirectional (UD) carbon fiber prepregs. Using CAI tests, the residual compressive strengths were determined, and the damage modes were detected using a thermal camera. The results of the drop weight impact tests showed that the specimen laminated at 0° suffered the largest damage because of susceptibility of the resin to impact. The specimens with 0°/90° and +45°/−45° fibers orientation exhibited more than 90% of the impact energy absorption and good impact resistance. Furthermore, the specimens that underwent the impact tests were subjected to compressive test simultaneously with the lock-in thermography defects detection. The results showed that internal delamination, fibers splitting, and broken fibers occurred. The temperature differences in the residual compression tests were not significant.

Simulation of drop-weight impact and compression after impact tests on composite laminates

2012 ◽  
Vol 94 (11) ◽  
pp. 3364-3378 ◽  
Author(s):  
E.V. González ◽  
P. Maimí ◽  
P.P. Camanho ◽  
A. Turon ◽  
J.A. Mayugo
Keyword(s):  
Composite Laminates ◽  
Impact Tests ◽  
Drop Weight ◽  
Compression After Impact ◽  
Weight Impact

scholarly journals Analysis of Impact Characteristics and Detection of Internal Defects for Unidirectional Carbon Composites with Respect to Fiber Orientation

2020 ◽  
Author(s):  
Sun-ho Go ◽  
Alexandre Tugirumubano ◽  
and Hong-gun Kim
Keyword(s):  
Carbon Fiber ◽  
Carbon Fiber Composites ◽  
Compression Tests ◽  
Internal Defects ◽  
Finite Elements Analysis ◽  
Impact Tests ◽  
Drop Weight ◽  
Weight Impact ◽  
Lock In ◽  
The Impact

.With the increasing use of carbon fiber reinforced plastics in various area, carbon fiber composites based on prepregs have attracted attention in industries and academia research. However, prepreg manufacturing processes are costly, and the strength of structures varies depending on the orientation and defects (pores and delamination). For non-contact evaluation of internal defects, we proposed lock-in infrared thermography to investigate orientation angles after a compression test. We also conducted a drop-weight impact test to study the behaviour of the composites after impact according the fibers orientation for composite fabricated using unidirectional carbon fiber prepregs. Using CAI tests, we determined the residual compressive strength and confirmed the damage modes using a thermal camera. The results of the drop weight impact tests show that the specimen laminated at 0° suffered the largest damage because of susceptibility of the resin to impact. In contrast, the specimens oriented in of 0°/90° and +45°/–45° directions transferred more than 90% of the impact energy back to the impactor because of the lamination of fibers in the orthogonal directions. Furthermore, the specimens that underwent complete damage in the impact tests were subjected to the lock-in method and showed internal delamination and cut fibers. With the finite elements analysis, the damage of each ply could be observed. Moreover, the temperature differences in the residual compression tests were not significant.

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