Interaction between Crack and Aggregate in Concrete under Dynamic Tensile Loading and Strain-Rate Effect on Material Strength

2011 ◽  
Vol 243-249 ◽  
pp. 5923-5929
Author(s):  
Lu Guang Liu ◽  
Zhuo Cheng Ou ◽  
Zhuo Ping Duan ◽  
Yan Liu ◽  
Feng Lei Huang
Keyword(s):  
Strain Rate ◽  
Loading Rate ◽  
Interfacial Strength ◽  
Aggregate Size ◽  
Tensile Loading ◽  
Strain Rate Effect ◽  
Rate Effect ◽  
Material Strength ◽  
Crack Penetration ◽  
Dynamic Tensile Loading

Crack propagation behaviors at a mortar-aggregate interface in concrete under dynamic tensile loading conditions are investigated numerically. It is found, for a certain interfacial strength and aggregate size, that the crack can penetrate through the interface under an external load with its loading-rate higher than a threshold value. Moreover, for the crack penetration, the smaller the radius of an aggregate, the higher the loading-rate is needed. Therefore, concrete failure energy increase considerably with the loading-rate (or the strain-rate). Such a strain-rate effect on the strength of concrete is in agreement with previous experimental results.

scholarly journals A cohesive-based method to bridge the strain rate effect and defects of RTM-6 epoxy resin under tensile loading

2020 ◽  
Vol 28 ◽  
pp. 1193-1203
Author(s):  
Dayou Ma ◽  
Ahmed Elmahdy ◽  
Patricia Verleysen ◽  
Marco Giglio ◽  
Andrea Manes
Keyword(s):  
Strain Rate ◽  
Epoxy Resin ◽  
Tensile Loading ◽  
Strain Rate Effect ◽  
Rate Effect

Study of the Strain Rate Effect on Cold-Reduced Carbon Steel and Aluminium Alloy with Numerical Simulations

2006 ◽  
Vol 532-533 ◽  
pp. 973-976
Author(s):  
Lin Wang ◽  
Tai Chiu Lee ◽  
Luen Chow Chan
Keyword(s):  
Carbon Steel ◽  
Strain Rate ◽  
Strain Path ◽  
Plastic Material ◽  
Strain Rate Effect ◽  
Rate Effect ◽  
Forming Process ◽  
Risk Area ◽  
Sensitive Material ◽  
Simulation Results

In this paper, the effect of strain rate has been considered in the simulation of forming process with a simple form combined into the material law. Quite a few researchers have proposed various hardening laws and strain rate functions to describe the material tensile curve. In this study, the strain rate model Cowper-Symonds is used with anisotropic elasto-plastic material law in the simulation process. The strain path evolution of certain elements, when the strain rate is considered and not, is compared. Two sheet materials, Cold-reduced Carbon Steel (SPCC) JIS G3141 and Aluminum alloy 6112 are used in this study. Two yield criteria, Hill 48 and Hill 90, are applied respectively to improve the accuracy of simulation result. They show different performance when strain rate effect is considered. Strain path of the elements in the fracture risk area of SPCC (JIS G3141) varies much when the strain rate material law is used. There is only little difference of the strain distribution of Al 6112 when the strain rate effect is included and excluded in the material law. The simulation results of material SPCC under two conditions indicate that the strain rate should be considered if the material is the rate-sensitive material, which provides more accurate simulation results.

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