What was Timoshenko’s Small-Increment Method? With an Application to Low-Velocity Impact of a Wood Beam

2017 ◽  
Vol 3 (1) ◽  
pp. 45-63 ◽  
Author(s):  
Tiberiu Polocoşer ◽  
Bohumil Kasal ◽  
Aljoscha Hallermann ◽  
Xinyi Li
2021 ◽  
Vol 149 ◽  
pp. 103799
Author(s):  
Zireen Z.A. Majeed ◽  
Nelson T.K. Lam ◽  
Emad F. Gad

2021 ◽  
pp. 002199832110293
Author(s):  
Memduh Kara ◽  
Mustafa Arat ◽  
Mesut Uyaner

In this paper, we have investigated the damages of glass fiber reinforced plastic (GFRP) composite tubes under the effect of low-velocity impact (LVI) at cryogenic environment conditions and room temperature. A GFRP composite tube consists of 6 layered E-glass/epoxy samples with a ± 55° winding angle, which produced by the filament winding method. Composite tubes either at room temperature or conditioned by liquid nitrogen at different temperature values (273 K, 223 K, 173 K, and 77 K) were impacted at 5, 7.5, and 10 J. Also, force-time and force-displacement graphs were plotted. The damaged regions of the samples were scrutinized. The damage areas of the GFRP composite tubes were smaller as the temperature decreased. However, the energy absorbed at low-temperature conditions was slightly higher than that absorbed in room temperature. Besides, no micro-cracks developed in the composite tubes after cryogenic conditioning.


2021 ◽  
Vol 292 ◽  
pp. 123437
Author(s):  
Lívia Ávila de Oliveira ◽  
Maikson Luiz Passaia Tonatto ◽  
Gabriela Luiza Cota Coura ◽  
Rodrigo Teixeira Santos Freire ◽  
Túlio Hallak Panzera ◽  
...  

2021 ◽  
pp. 152808372110154
Author(s):  
Ziyu Zhao ◽  
Tianming Liu ◽  
Pibo Ma

In this paper, biaxial warp-knitted fabrics were produced with different high tenacity polyester linear density and inserted yarns density. The low-velocity impact property of flexible composites made of polyurethane as matrix and biaxial warp-knitted fabric as reinforcement has been investigated. The effect of impactor shape and initial impact energy on the impact response of flexible composite is tested. The results show that the initial impact energy have minor effect on the impact response of the biaxial warp-knitted flexible composites. The impact resistance of flexible composite specimen increases with the increase of high tenacity polyester linear density and inserted yarns density. The damage morphology of flexible composite materials is completely different under different impactor shapes. The findings have theoretical and practical significance for the applications of biaxial warp-knitted flexible composite.


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