Diseño de un atenuador de impacto utilizando un material alternativo

Edgar Vicente Rojas Reinoso; Johnny Marcelo Pancha Ramos; Jorge Mauricio Néjer Guerreo; Vicente Romero Hidalgo

doi:10.14483/22487638.15588

Diseño de un atenuador de impacto utilizando un material alternativo

Tecnura ◽

10.14483/22487638.15588 ◽

2021 ◽

Vol 25 (67) ◽

pp. 71-85

Author(s):

Edgar Vicente Rojas Reinoso ◽

Johnny Marcelo Pancha Ramos ◽

Jorge Mauricio Néjer Guerreo ◽

Vicente Romero Hidalgo

Keyword(s):

Explicit Dynamics ◽

Ansys Workbench

RESUMEN Objetivo: El presente trabajo muestra el diseño y simulación de un atenuador de impacto delantero a escala para un vehículo tipo sedán, para lo cual se realizó el modelado en el software SolidWorks y la simulación a través del software Ansys Workbench con el fin de analizar el comportamiento y absorción de energía del componente durante el impacto. Por último, se realizó la impresión del atenuador de impacto a escala para validar el modelo Metodología: En este trabajo se presenta el diseño y simulación especializada mediante modelado de elementos finitos para un problema de deformación plana de un atenuador de impacto en estado de deformación. Se realizó la simulación de impacto frontal en el módulo Explicit Dynamics del software Ansys Workbench empleando dos tipos materiales; uno es el PP-GF45 que viene originalmente en el vehículo Chevrolet Optra 1.8 tipo sedán y el otro material es el PLA-CF30. Se tomó como referencia los ensayos realizados por la Latin NCAP y la norma de colisiones UN R94 en que se rigen esta compañía para la aprobación de vehículos respecto a seguridad en latinoamérica. Luego se complementó el estudio con los ensayos de impacto Charpy hechos en el laboratorio de la Facultad de Mecánica de la Escuela Superior Politécnica de Chimborazo según la normativa ASTM D6110-04 . para ello, fue necesario extraer cinco probetas por cada material Resultados: En el análisis de los resultados se evaluó la ligereza, deformación, esfuerzos y absorción de energía. Los resultados obtenidos por medio del software y el ensayo de impacto Charpy en el laboratorio de la absorción de energía tienen una relación coherente entre los dos materiales por lo que nos da certeza de que los resultados encontrados son confiables. Conclusiones: Mediante la simulación del impacto frontal en el módulo de Explicit Dynamics del software Ansys Workbench se pudo evaluar el modelo virtual, simulando las condiciones en la que se da un choque frontal real. Así se determinó que la geometría y el material seleccionado cumplen los requisitos para la implementación en un vehículo. Financiamiento: Financiamiento propio de los autores

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Simulation and Experimental Tests of Ballistic Impact on Composite Laminate Armor

Advances in Materials Science and Engineering ◽

10.1155/2018/4696143 ◽

2018 ◽

Vol 2018 ◽

pp. 1-12 ◽

Cited By ~ 7

Author(s):

Ali Murat Soydan ◽

Bahadır Tunaboylu ◽

Ahmed Galal Elsabagh ◽

Abdul Kadir Sarı ◽

Recep Akdeniz

Keyword(s):

Composite Laminate ◽

Experimental Testing ◽

Experimental Tests ◽

Ballistic Impact ◽

Impact Tests ◽

Explicit Dynamics ◽

Composite Armor ◽

Simulation Results ◽

Good Agreement ◽

Ansys Workbench

This paper presents the experimental testing and simulation results of ballistic impact tests on laminated armor samples that consist of three layers of different materials: fiber-cement, Kevlar fabric, and steel. In experimental tests, a 9 mm FMJ bullet was launched towards a 100 cm2 sample of the armor from the fiber-cement side. Ansys Workbench Explicit Dynamics and Ansys AUTODYN 3D were used to model and simulate the ballistic impact. Experimental testing and simulation results were compared to analyze the behavior of composite armor designs, and a good agreement was observed.

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Inducing Frictional Force to Enhance the Transient Response in Beams

Al-Nahrain Journal for Engineering Sciences ◽

10.29194/njes.22020088 ◽

2019 ◽

Vol 22 (2) ◽

pp. 88-93

Author(s):

Hamed Khanger Mina ◽

Waleed K. Al-Ashtrai

Keyword(s):

Numerical Analysis ◽

Transient Response ◽

Frictional Force ◽

Damping Ratio ◽

Experimental Results ◽

Damping Capacity ◽

Tightening Force ◽

Contact Areas ◽

Good Agreement ◽

Ansys Workbench

This paper studies the effect of contact areas on the transient response of mechanical structures. Precisely, it investigates replacing the ordinary beam of a structure by two beams of half the thickness, which are joined by bolts. The response of these beams is controlled by adjusting the tightening of the connecting bolts and hence changing the magnitude of the induced frictional force between the two beams which affect the beams damping capacity. A cantilever of two beams joined together by bolts has been investigated numerically and experimentally. The numerical analysis was performed using ANSYS-Workbench version 17.2. A good agreement between the numerical and experimental results has been obtained. In general, results showed that the two beams vibrate independently when the bolts were loosed and the structure stiffness is about 20 N/m and the damping ratio is about 0.008. With increasing the bolts tightening, the stiffness and the damping ratio of the structure were also increased till they reach their maximum values when the tightening force equals to 8330 N, where the structure now has stiffness equals to 88 N/m and the damping ratio is about 0.062. Beyond this force value, increasing the bolts tightening has no effect on stiffness of the structure while the damping ratio is decreased until it returned to 0.008 when the bolts tightening becomes immense and the beams behave as one beam of double thickness.

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Dynamic Behavior Analysis of the Slider Crank Linkage using ANSYS Workbench and MATLAB Program

Wasit Journal of Engineering Sciences ◽

10.31185/ejuow.vol1.iss1.3 ◽

2013 ◽

Vol 1 (1) ◽

pp. 42-25

Author(s):

Nabil N. Swadi

Keyword(s):

Graphical Method ◽

Joint Torque ◽

Pressure Force ◽

Matlab Program ◽

Element Simulation ◽

Acceleration Method ◽

Complete Revolution ◽

Two Phases ◽

Good Agreement ◽

Ansys Workbench

This paper is concerned with the study of the kinematic and kinetic analysis of a slider crank linkage using D'Alembert's principle. The links of the considered mechanism are assumed to be rigid. The analytical solution to observe the motion (displacement, velocity, and acceleration), reactions at each joint, torque required to drive the mechanism and the shaking force have been computed by a computer program written in MATLAB language over one complete revolution of the crank shaft. The results are compared with a finite element simulation carried out by using ANSYS Workbench software and are found to be in good agreement. A graphical method (relative velocity and acceleration method) has been also applied for two phases of the crank shaft (q2 = 10° and 130°). The results obtained from this method (graphical) are compared with those obtained from analytical and numerical method and are found very acceptable. To make the analysis linear the friction force on the joints and sliding interface are neglected. All results, in this work, are obtained when the crank shaft turns at a uniform angular velocity (w2 = 188.5 rad/s) and time dependent gas pressure force on the slider crown.

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