scholarly journals Influence of measuring system on rheological behavior of PVA-fiber reinforced mortars

2022 ◽  
Vol 314 ◽  
pp. 125613
Author(s):  
Marylinda Santos de França ◽  
Bogdan Cazacliu ◽  
Thomas Kränkel ◽  
Holmer Savastano Jr.
Keyword(s):  
Rheological Behavior ◽  
Measuring System ◽  
Fiber Reinforced ◽  
Pva Fiber

Mix design and flexural toughness of PVA fiber reinforced fly ash-geopolymer composites

2017 ◽  
Vol 150 ◽  
pp. 179-189 ◽  
Author(s):  
Fang Xu ◽  
Xin Deng ◽  
Chao Peng ◽  
Jing Zhu ◽  
Jianping Chen
Keyword(s):  
Fly Ash ◽  
Mix Design ◽  
Fiber Reinforced ◽  
Flexural Toughness ◽  
Pva Fiber ◽  
Geopolymer Composites

scholarly journals Blast-Resistant Performance of Hybrid Fiber-Reinforced Concrete (HFRC) Panels Subjected to Contact Detonation

2019 ◽  
Vol 10 (1) ◽  
pp. 241
Author(s):  
Wenjin Yao ◽  
Weiwei Sun ◽  
Ze Shi ◽  
Bingcheng Chen ◽  
Le Chen ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Blast Resistance ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Hybrid Fiber ◽  
Hybrid Effect ◽  
Pva Fiber ◽  
Resistance Performance

This paper experimentally investigates the blast-resistant characteristics of hybrid fiber-reinforced concrete (HFRC) panels by contact detonation tests. The control specimen of plain concrete, polypropylene (PP), polyvinyl alcohol (PVA) and steel fiber-reinforced concrete were prepared and tested for characterization in contrast with PP-Steel HFRC and PVA-Steel HFRC. The sequent contact detonation tests were conducted with panel damage recorded and measured. Damaged HFRC panels were further comparatively analyzed whereby the blast-resistance performance was quantitively assessed via damage coefficient and blast-resistant coefficient. For both PP-Steel and PVA-Steel HFRC, the best blast-resistant performance was achieved at around 1.5% steel + 0.5% PP-fiber hybrid. Finally, the fiber-hybrid effect index was introduced to evaluate the hybrid effect on the explosion-resistance performance of HFRC panels. It revealed that neither PP-fiber or PVA-fiber provide positive hybrid effect on blast-resistant improvement of HFRC panels.

Actuator Performance Degradation of Piezo-Composite Actuator LIPCA under Cyclic Actuation

2004 ◽  
Vol 261-263 ◽  
pp. 1331-1336 ◽  
Author(s):  
Kwang Joon Yoon ◽  
Kyu Young Kim ◽  
Nam Seo Goo ◽  
Hyun Chul Park ◽  
J.R. Haw
Keyword(s):  
Coefficient Of Thermal Expansion ◽  
Test System ◽  
Ceramic Layer ◽  
Measuring System ◽  
Repeated Loading ◽  
Fiber Direction ◽  
Fiber Reinforced ◽  
Design Flexibility ◽  
Composite Actuator ◽  
Fatigue Characteristics

This paper is concerned with the fatigue characteristics of LIPCA (LIghtweight Piezo-Composite Actuator) device system. LIPCA device system is composed of a piezoelectric ceramic layer and fiber reinforced light composite layers, typically a PZT ceramic layer is sandwiched by a top fiber layer with low CTE (coefficient of thermal expansion) and base layers with high CTE. The advantages of the LIPCA design are using the lightweight fiber reinforced plastic layers without compromising the generation of high force and large displacement and to have design flexibility by selecting the fiber direction and the size of prepreg layers. In addition to the lightweight advantage and design flexibility, the proposed device can be manufactured without adhesive layers when we use resin prepreg system. To investigate the degradation of actuation performance of LIPCA due to the repeated fatigue loading, the repeated loading tests up to several million cycle were performed and the actuation displacement for a given excitation voltage was measured during the test. The fatigue characteristics was measured using an actuator test system consisted of an actuator supporting jig, a high voltage actuating power supplier, and a non-contact laser measuring system and evaluated.

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