NUMERICAL ANALYSIS OF ENGLISH BOWS USED IN BATTLE OF CRÉCY

2017 ◽  
pp. 69-85
Author(s):  
Mariusz MAGIER ◽  
Adrian Nowak ◽  
Tomasz , MERDA ◽  
Paweł Żochowski
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Steel Plate ◽  
Flight Path ◽  
The Finite Element Method ◽  
Penetration Process ◽  
Technical Parameters ◽  
Simulation Process ◽  
Maximum Range

The paper presents simulation of flight path of an arrow shot with a longbow and its penetration process through a steel plate imitating an armor of a medieval heavy cavalry knights used during the Battle of Crécy on 26 August, 1346. The battle was a turning moment which had settled the specific role of the English bow in tactics and methods of its deployment on battle fields for almost 200 years until the firearms such as arquebuses or muskets started to be commonly used. The basic technical parameters necessary for the simulation process are based on historical information. On the basis of numerical calculations, the parameters of the flight path of the arrow with the "anti-armor" head were determined up to the maximum range. Thanks to use of the finite element method (AUTODYN) the penetration capacity of the arrow shot from longbow against horseman’s armor of XIV century was estimated.

ANALYSIS OF BALLISTIC CHARACTERISTICS OF 16th CENTURY ARQUEBUSES USED IN BATTLE OF PAVIA

2017 ◽  
pp. 71-84
Author(s):  
Mariusz Magier ◽  
Adrian Nowak ◽  
Tomasz Merda ◽  
Paweł Żochowski
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Flight Path ◽  
Numerical Calculations ◽  
16Th Century ◽  
The Finite Element Method ◽  
Penetration Process ◽  
Historical Information ◽  
Simulation Process ◽  
Element Method

The paper presents simulation of flight path of a lead ball fired with an arquebus and its penetration process through an armor of heavy cavalry knights of the beginning of the 16th century used during the Battle of Pavia on 24 February, 1525. The mass use of firearms by the footmen against the cavalry decided the result of the battle and started a large deployment of infantry formations armed in firearms. The basic ballistic characteristics of 16th century arquebus necessary for the simulation process are based on historical information. The numerical calculations were used to identify the flying characteristics of the lead ball at the distances securing the penetration of that time horseman’s armour. Penetration capacity of the lead ball through the 16th age horseman armour was estimated by using the finite element method (AUTODYN).

THE ROLE OF FINITE ELEMENT METHOD IN CIVIL ENGINEERING

2018 ◽  
Vol 5 (02) ◽  
Author(s):  
Er. Hardik Dhull
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Approximate Solution ◽  
Analytical Method ◽  
Civil Engineering ◽  
The Finite Element Method ◽  
Engineering Problems ◽  
Building Components ◽  
Element Method

The finite element method is a numerical method that is used to find solution of mathematical and engineering problems. It basically deals with partial differential equations. It is very complex for civil engineers to study various structures by using analytical method,so they prefer finite element methods over the analytical methods. As it is an approximate solution, therefore several limitationsare associated in the applicationsin civil engineering due to misinterpretationof analyst. Hence, the main aim of the paper is to study the finite element method in details along with the benefits and limitations of using this method in analysis of building components like beams, frames, trusses, slabs etc.

The Qualification of Safety Critical Structures by Finite Element Analytical Methods

1996 ◽  
Vol 210 (2) ◽  
pp. 203-207 ◽  
Author(s):  
A J Morris
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Error Control ◽  
Analysis Method ◽  
The Finite Element Method ◽  
Method Error ◽  
Safety Critical ◽  
Critical Situation ◽  
Error Treatment

The paper introduces the concept of certifying or qualifying structures in a safety critical situation using the finite element method. Error control and error treatment methods for this purpose are discussed together with the associated role of testing. The underlying methodology follows the principles laid down in the SAFESA (SAFE Structural Analysis) method which is described in outline.

An innovative system of coupled steel plate shear wall with pin FUSE in link beam: Cyclic behavior and energy dissipation

2021 ◽  
pp. 136943322110542
Author(s):  
Mahdi Usefvand ◽  
Ahmad Maleki ◽  
Babak Alinejad
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Energy Dissipation ◽  
Steel Plate ◽  
Shear Walls ◽  
Shear Wall ◽  
High Ductility ◽  
The Finite Element Method ◽  
Steel Plate Shear Walls ◽  
Steel Plate Shear Wall

Coupled steel plate shear wall (C-SPSW) is one of the resisting systems with high ductility and energy absorption capacity. Energy dissipation in the C-SPSW system is accomplished by the bending and shear behavior of the link beams and SPSW. Energy dissipation and floor displacement control occur through link beams at low seismic levels, easily replaced after an earthquake. In this study, an innovative coupled steel plate shear wall with a yielding FUSE is presented. The system uses a high-ductility FUSE pin element instead of a link beam, which has good replaceability after the earthquake. In this study, four models of coupled steel plate shear walls were investigated with I-shaped link beam, I-shaped link beam with reduced beam section (RBS), box-link beam with RBS, and FUSE pin element under cyclic loading. The finite element method was used through ABAQUS software to develop the C-SPSW models. Two test specimens of coupled steel plate shear walls were validated to verify the finite element method results. Comparative results of the hysteresis curves obtained from the finite element analysis with the experimental curves indicated that the finite element model offered a good prediction of the hysteresis behavior of C-SPSW. It is demonstrated in this study that the FUSE pin can improve and increase the strength and energy dissipation of a C-SPSW system by 19% and 20%, respectively.

Role of trabecular microfractures in failure of human vertebrae estimated by the finite element method

2009 ◽  
Author(s):  
Irina N. Sidorenko ◽  
Jan Bauer ◽  
Roberto Monetti ◽  
Dirk Müller ◽  
Ernst J. Rummeny ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
The Finite Element Method ◽  
Element Method

Estimation of Sound Absorption Performance of Complex Perforated Panel Absorbers by Numerical Finite Element Method and Examinining the Role of Different Layouts Behind It

2019 ◽  
Vol 18 (03) ◽  
pp. 1950013
Author(s):  
Z. Hashemi ◽  
M. R. Monazzam ◽  
A. Fahim
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Sound Absorption ◽  
Current Method ◽  
The Finite Element Method ◽  
Impedance Tube ◽  
Absorption Performance ◽  
Numerical Finite Element ◽  
Element Method

Perforated panels are one of the structures that are widely used nowadays. The sound absorption behavior of materials is studied by solving the equations governing the wave propagation in these materials. In this paper, the finite element method (FEM) was used to predict the absorption performances of few different perforated composite panels. Also, the studied structures were examined by two-microphone impedance tube to validate the results of the numerical method. The relative consistency of the results of the current method with the results of the impedance tube suggests the accuracy of this method in simulating the absorption rate of perforated composites. In addition, the results of evaluating various layouts (arrangements) showed that the use of absorber materials with higher flow resistivity at the back of the perforated panel and at the beginning of the sound wave entry increases the absorption performance by 1.6 times than that of the inverse layout ratio.

Research on Ball Spinning Forming of Superalloy Inconel 718 Thin-Walled Tube

2011 ◽  
Vol 189-193 ◽  
pp. 2742-2745 ◽  
Author(s):  
Yong Hua Li ◽  
Tao Fan ◽  
Ning Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Inconel 718 ◽  
Principal Axis ◽  
The Finite Element Method ◽  
Technical Parameters ◽  
Thin Walled Tube ◽  
Spinning Process ◽  
Ball Spinning ◽  
Thin Walled

Ball spinning is an effective process to manufacture thin-walled tubular product of superalloy Inconel 718, which has been used widely in aerospace and other fields. In this literature, ball spinning process of superalloy thin-walled tube was investigated using software DEFORM. The build-up phenomenon and its influencing factors like principal axis speed, axial feed rate and wall thichness reduction were investigated using the finite element method (FEM). The experiment of ball spinning process was perfomed based on the proper technical parameters obtained by simulation. The simulated results agreed well with the experimental results.

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