Finite Element Analysis of Measuring Soil Static Resistance by High Strain Dynamic Test

2012 ◽  
Vol 6 (1) ◽  
pp. 629-633
Author(s):  
Longyan Zhang ◽  
Junping Hu ◽  
Yong Guo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
High Strain ◽  
Dynamic Test ◽  
Element Analysis ◽  
Static Resistance

Forced Vibration Behavior of Adhesively Bonded Single-Lap Joint

2011 ◽  
Vol 110-116 ◽  
pp. 3611-3616 ◽  
Author(s):  
Xiao Cong He
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Forced Vibration ◽  
Natural Frequencies ◽  
Dynamic Test ◽  
Lap Joint ◽  
Adhesively Bonded ◽  
Element Analysis ◽  
Single Lap Joint ◽  
Vibration Behavior

This paper deals with forced vibration behavior of adhesively bonded single-lap joint theoretically and experimentally. The finite element analysis (FEA) software was used to predict the natural frequencies and frequency response functions (FRFs) of the joint. The dynamic test software and the data acquisition hardware were used in experimental measurement of the dynamic response of the joint. It is shown that the natural frequencies of the joint from experiment are lower than those predicted using finite element analysis. It is also found that the measued FRFs are close to the predicted FRFs for the first two modes of vibration of the joint. Above the second mode of vibration, there is considerable discrepancy between the measured and predicted FRFs.

A computational investigation on the influence of the l/d ratio and strain rate on the deformation behavior of rolled and homogeneous armor steel in the split Hopkinson pressure bar test process

2021 ◽  
pp. 095440892110365
Author(s):  
Ambuj Saxena ◽  
Shashi Prakash Dwivedi ◽  
Ashish K Srivastava ◽  
Shubham Sharma ◽  
Nitin Kotkunde
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
High Strain Rate ◽  
Strain Rate ◽  
Deformation Behavior ◽  
High Strain ◽  
Stress Strain ◽  
Element Analysis ◽  
Armor Steel ◽  
Strain Responses

The present investigation deals with the finite-element analysis of the high strain rate deformation behavior of the quenched and tempered armor-grade rolled and homogeneous armor steel. The rolled and homogeneous armor steel is extensively used in civil and military structures such as battle tanks, armament combat vehicles, combat helicopter, etc. The dynamic deformation behavior of rolled and homogeneous armor steel, that is, resistance against ballistic circumstances relates to its mechanical behavior under high strain rate conditions. In the present research work, a finite-element analysis investigation (using Abaqus finite-element analysis code) has been carried out to evaluate the influence of specimen l/d ratios and high loading strain rates on the deformation behavior and stress–strain responses of the rolled and homogeneous armor steel. Further, an attempt has also been made to check the high strain rate and specimen l/d ratio influence on the strain amplitudes of incident, reflected, and transmitted pulses. The numerical investigation has been carried out with the rolled and homogeneous armor steel specimen with l/d ratios of 1, 0.8, and 0.6. In addition, three high impact strain rates of 2130, 2907, and 3105 s−1 are considered to evaluate the stress–strain responses. The results revealed that the l/d ratio and strain rate have a significant influence on the specimen stress–strain response and the strain amplitudes of incident, reflected, and transmitted pulses. The peak stress value is increased with the increase in the l/d ratio and strain rate. The developed finite-element analysis model has predicted the stress–strain responses with <3% percentage error. The obtained finite-element analysis results have been validated with the experimental investigation with an l/d ratio of 0.6 and a strain rate of 3105 s−1 for rolled and homogeneous armor steel.

An Improved Heat Equation to Model Ductile-to-Brittle Failure Mode Transition at High Strain Rates Using Fully Coupled Thermal-Structural Finite Element Analysis

2014 ◽  
Vol 354 ◽  
pp. 1-23 ◽  
Author(s):  
Ladislav Écsi ◽  
P. Élesztős
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Heat Equation ◽  
Brittle Failure ◽  
High Strain ◽  
Strain Rates ◽  
Mode Transition ◽  
Element Analysis ◽  
Failure Mode Transition ◽  
Fully Coupled

In this paper a universal heat equation for fully coupled thermal structural finite element analysis of deformable solids capable of predicting ductile-to-brittle failure mode transition at high strain rates is presented. In the problem mathematical formulation appropriate strain measures describing the onset and the growth of ductile and total damage and heat generation rate per unit volume to model dissipation-induced heating have been employed, which were extended with the heat equation. The model was implemented into a finite element code utilizing an improved weak form for updated Lagrangian formulation, an extended NoIHKH material model for cyclic plasticity of metals applicable in wide range of strain rates and the Jaumann rate in the form of the Green-Naghdi rate in the co-rotational Cauchy’s stress objective integration. The model verification showed excellent agreement with the modelled experiment at low strain rates. Plastic bending of a cantilever has been studied at higher strain rates. A few selected analysis results are presented and briefly discussed.

Experimental Verification and Finite Element Analysis of Automotive Door Hinge

2014 ◽  
Author(s):  
S. Doğan ◽  
C. Guven ◽  
F. Karpat ◽  
T. G. Yilmaz ◽  
O. Dogan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Automotive Industry ◽  
Low Cost ◽  
Dynamic Test ◽  
Test Results ◽  
Customer Requirements ◽  
Element Analysis ◽  
Door Hinge ◽  
Fixed Part

In automotive industry, achieving lightweight, low-cost, reliable and more accurate product design are the most important goal. Using Finite Element Analysis (FEA) is an important tool for achieving this since it decreases prototyping cost and time. Cars have different door system and one of the important part of them is door hinge. An automotive door hinge is mainly composed of three elements, fixed part, mobile part and hinge pin that fasten fixed part and mobile parts. Manufacturers have to perform tests and analysis for ensuring international and customer requirements. In this study, FEA results are compared with static and dynamic test results of front door hinge of automotive according to International specifications. The agreement between the computed and measured values is shown.

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