Three-dimensional, transient model for laser machining of ablating decomposing materials

被引：71

作者：

Modest, MF

机构：

[1] Department of Mechanical Engineering, Pennsylvania State University, University Park

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 1996年 / 39卷 / 02期

关键词：

D O I：

10.1016/0017-9310(95)00134-U

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A three-dimensional conduction model has been developed to predict the transient temperature distribution inside a thick solid that is irradiated by a moving laser source, and the changing shape of a groove carved into it by evaporation of material. The laser may operate in CW or in pulsed mode with arbitrary temporal as well as spatial intensity distribution. The governing equations are solved using a finite difference method on an algebraically-generated boundary-fitted coordinate system. The accuracy of the present transient model was verified by comparison with previous three-dimensional codes that were limited to quasi-steady CW operation. Groove shapes and temperature distributions, as well as their transient development, for various machining conditions are presented, demonstrating the differences in the ablation process between CW, pulsed and Q-switched (or other pulses of extremely short duration) laser operation.

引用

页码：221 / 234

页数：14

共 27 条

[11]

Luxon J. T., 1985, IND LASERS THEIR APP

[12] HEAT-CONDUCTION IN A MOVING SEMI-INFINITE SOLID SUBJECTED TO PULSED LASER IRRADIATION [J].

MODEST, MF ;

ABAKIANS, H .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1986, 108 (03) :597-601

[13] EVAPORATIVE CUTTING OF A SEMIINFINITE BODY WITH A MOVING CW LASER [J].

MODEST, MF ;

ABAKIANS, H .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1986, 108 (03) :602-607

[14]

MODEST MF, 1995, J LASER APPLICATIONS, V7

[15]

MODEST MF, 1994, P ICALEO 94, P303

[16]

PETRING D, 1988, F M-FEINWERKTECH MES, V96, P364

[17]

Press W., 1992, NUMERICAL RECIPIES F

[18]

RAMANATHAN S, 1990, 22 P ICHMT INT S MAN

[19]

RAMANATHAN S, 1992, LASER ADV MATERIALS, V2, P625

[20]

RAMANATHAN S, 1990, HEAT TRANSFER SP HTD, V135, P101

← 1 2 3 →