scholarly journals Drop-weight impact tests and finite element modeling of cast acrylic plates

2009 ◽  
Vol 28 (6) ◽  
pp. 599-611 ◽  
Author(s):  
Yanxiong Liu ◽  
Benjamin Liaw
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Element Modeling ◽  
Impact Tests ◽  
Drop Weight ◽  
Weight Impact

scholarly journals A Comprehensive Study on the Deformation Behavior of Hadfield Steel Sheets Subjected to the Drop Weight Test: Experimental Study and Finite Element Modeling

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 734 ◽  
Author(s):  
Halil Enginsoy ◽  
Emin Bayraktar ◽  
Ali Kurşun
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Impact Behavior ◽  
Manganese Steel ◽  
Hadfield Steel ◽  
Element Modeling ◽  
Drop Weight ◽  
Different Temperatures ◽  
Weight Test ◽  
Drop Weight Test

This work presents the results of experimental and finite element modeling studies of impact behavior on the response of a high content of manganese steel blanks with a 1.2 mm thickness of sheets, known also commercially as Hadfield steel (an austenitic structure with a basic composition containing C 1.2% and Mn 12%). The study was done with a standard drop weight test device under certain variable parameters (velocity: 3 m/s and 5 m/s and temperature: room temperature, 70 °C, 100 °C, and 140 °C). In this study, the evolution of force and energy values were analyzed depending on the time in the case of impact. Special care was given to the evolution of peak stress counters of finite element simulation for different temperatures. The results of the force-time, energy-time, and force-displacement curves under different temperatures and impact velocities are compared experimentally and numerically. Then the discussion are built on the effect of the operational parameters on the damage behavior of this steel. Both of these works (experimental and finite element modeling) were compared and highly satisfying results were obtained.

Drop-Weight Impact Responses of Woven Hybrid Glass-Graphite/Toughened Epoxy Composites

2008 ◽  
Author(s):  
E. Sevkat ◽  
B. M. Liaw ◽  
F. Delale ◽  
B. B. Raju
Keyword(s):  
Finite Element ◽  
Nonlinear Finite Element ◽  
Dynamic Force ◽  
Composite Panels ◽  
Finite Element Software ◽  
Impact Tests ◽  
Toughened Epoxy ◽  
Drop Weight ◽  
Different Shapes ◽  
Weight Impact

A hybrid experimental and 3-D dynamic nonlinear finite element approach was used to study damage in 101.6mm × 101.6mm composite panels subject to drop-weight impact up to 50 J. The specimens tested were made of hybrid woven S2-glass-IM7 graphite fibers/toughened epoxy (cured at 177°C). The composite panels were damaged by impacts using a pressure-assisted Instron-Dynatup 8520 instrumented drop-weight impact tester. During the low velocity impact tests, the time-histories of impact-induced dynamic strains and impact forces were recorded. Two types of drop-weight impact tests were conducted. The first focused on the effect of different shapes of the impactor and the second involved progression of the damage in the composite when impacted repeatedly. The commercially available 3-D dynamic nonlinear finite element software, DYNA, was then used to simulate the experimental results of drop-weight tests using different shapes of the impactor. Good agreement between experimental and FEM results has been achieved when comparing dynamic force, strain histories and damage patterns from experimental measurements and finite element simulations.

Exact First Order Finite Element Modeling for Eddy Current NDE

1991 ◽  
Vol 3 (1) ◽  
pp. 235-253 ◽  
Author(s):  
L. D. Philipp ◽  
Q. H. Nguyen ◽  
D. D. Derkacht ◽  
D. J. Lynch ◽  
A. Mahmood
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Eddy Current ◽  
Element Modeling ◽  
First Order ◽  
Eddy Current Nde
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