scholarly journals A TWO-SCALE RATE DEPENDENT CRACK MODEL FOR QUASI-BRITTLE MATERIALS UNDER DYNAMIC LOADING

2014 ◽  
Author(s):  
A. Karamnejad ◽  
V. P. Nguyen ◽  
L. J. Sluys
Keyword(s):  
Dynamic Loading ◽  
Brittle Materials ◽  
Crack Model ◽  
Rate Dependent

Effect of Rate Sensitivity on Necking Behavior of a Laminated Tube Under Dynamic Loading

2013 ◽  
Vol 81 (5) ◽  
Author(s):  
Y. Shi ◽  
P. D. Wu ◽  
D. J. Lloyd ◽  
D. Y. Li
Keyword(s):  
Dynamic Loading ◽  
High Speed ◽  
Volume Fraction ◽  
Numerical Study ◽  
Rate Sensitivity ◽  
Element Model ◽  
Localized Necking ◽  
Rate Dependent ◽  
Positive Rate ◽  
Laminated Materials

An elastic-viscoplastic based finite element model has been developed to study the necking behavior of tube expansion for rate independent materials, rate dependent monolithic materials, and laminated materials during dynamic loading. A numerical study shows that for rate independent materials, the dynamic loading will not delay diffused necking but localized necking; for rate dependent materials, high strain rate sensitivity can significantly delay the onset of localized necking for both monolithic and laminated sheets and affect the multiple-neck formation in high-speed dynamic loading. The model also shows that a higher volume fraction of a clad layer with positive rate sensitivity material in a laminated sheet improves the sheet ductility.

scholarly journals Mechanical Properties of Brittle Materials and Their Single Fracture under Dynamic Loading

1973 ◽  
Vol 37 (12) ◽  
pp. 1218-1226,a3 ◽  
Author(s):  
Saburo Yashima ◽  
Yoshiteru Kanda ◽  
Toru Sasaki ◽  
Masayoshi Iijima ◽  
Fumio Saito
Keyword(s):  
Mechanical Properties ◽  
Dynamic Loading ◽  
Brittle Materials ◽  
Single Fracture
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