INSTITUTO POLITÉCNICO NACIONAL

ESCUELA SUPERIOR DE INGENIERÍA MECÁNICA Y ELÉCTRICA

UNIDAD CULHUACÁN

IMPACT TESTING

DISEÑO DE ELEMENTOS MECÁNICOS

PRESENTAN:CÁRDENAS ALVAREZ JULIO CÉSAR

EDUARDO JAVIER GRANADOS SÁNCHEZ

México, D.F. Marzo 2015

ASESORA:

MAGDALENO VÁSQUEZ RODRÍGUEZ

ÍNDICE

IMPACT TESTING PRACTICE.

Introducción………………………………………………………………………..………1

Capítulo I

CHARPY AND IZOD IMPACT TESTING

Summary…………………………………………………………………………………...2

Significance and use ……………………………………………………………………..3

Testing machines………………………………………………………………………….3

Sampling …………………………………………………………………………………..5

Number of specimens ……………………………………………………………………5

Type and size …………………………………………………………………………….5

Configuration and orientation …………………………………………………………...7

Subsized specimens ……………………………………………………………………10

Preparation of the apparatus …………………………………………………………..10

Temperature control……………………………………………………………………..11

Capítulo II

PROCEDURE OF CHARPY METHOD

Temperature ……………………………………………………………………………..12

Positioning ……………………………………………………………………………….13

Recovering ………………………………………………………………………………13

Individual test values ………………………………………………………….………..13

Fracture appearance ……………………………………………………………….…..13

Lateral expansion ……………………………………………………………………….14

Report……………………………………………………………………………………..19

Capítulo III

PROCEDURE OF IZOD METHOD

Scope……………………………………………………………………………..…….…21

Type of test………………………………………………………………………….……22

Apparatus…………………………………………………………………………………24

Test specimens…………………………………………………………………………..30

Conditioning………………………………………………………………………………31

Proceder………………………………………………………………………………….31

Report……………………………………………………………………………………..33

Bibliografía……………………………………………………………………….………34

Anexos……………………………………………………………………………………34