Ultrasonic cutting - A fracture mechanics model

被引：16

作者：

Smith, A ^{[1
]}

Nurse, A ^{[1
]}

Graham, G ^{[1
]}

Lucas, M ^{[1
]}

机构：

[1] LOUGHBOROUGH UNIV TECHNOL,DEPT MECH ENGN,LOUGHBOROUGH LE11 3TU,LEICS,ENGLAND

来源：

ULTRASONICS | 1996年 / 34卷 / 2-5期

基金：

英国工程与自然科学研究理事会;

关键词：

fracture; ultrasonic cutting; stress;

D O I：

10.1016/0041-624X(95)00078-H

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

In order to understand the fracture process of ultrasonically cutting through a brittle material a finite element analysis has been performed. The stress state at the crack tip was analysed by numerical determination of the stress intensity factor for a three-dimensional crack loaded on its faces by displacements corresponding to the modal amplitudes of the excited blade. For two vibrational modes of interest the results indicate that the stress intensity factor increases when the blade is nearer the crack tip. This fracture mechanics' approach allows an assessment to be made of the optimum cutting performance between the two modes and the conclusions drawn agree with observations made during earlier cutting trials.

引用

页码：197 / 203

页数：7

共 7 条

[1] [Anonymous], 1966, ASTM STP
[2] EWALDS H, 1989, FRACTURE MECHANICS
[3] Henshell R. D., 1975, International Journal for Numerical Methods in Engineering, V9, P495, DOI 10.1002/nme.1620090302
[4] Irwin G.R., 1957, Trans. ASME Ser. E, V24, P361, DOI DOI 10.1115/1.4011547
[5] LUCAS M, 1993, P ULTR INT VIENN
[6] LUCAS M, 1993, IOP C MOD PRACT STRE
[7] DETERMINATION OF PREDOMINANTLY MODE-II STRESS INTENSITY FACTORS FROM ISOCHROMATIC DATA
NURSE, AD
PATTERSON, EA
[J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 1993, 16 (12) : 1339 - 1354

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