A FORWARD GRADIENT TIME INTEGRATION PROCEDURE FOR AN INTERNAL VARIABLE CONSTITUTIVE MODEL OF SN-PB SOLDER

被引：8

作者：

BUSSO, EP ^{[1
]}

KITANO, M ^{[1
]}

KUMAZAWA, T ^{[1
]}

机构：

[1] HITACHI LTD,MECH ENGN RES LAB,TSUCHIURA,IBARAKI 300,JAPAN

来源：

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING | 1994年 / 37卷 / 04期

关键词：

D O I：

10.1002/nme.1620370402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A self-correcting forward gradient time integration procedure is formulated for the integration of a new unified visco-plastic constitutive model for an eutectic solder alloy using a tensorial internal state variable. The procedure has been implemented numerically into a commercial FE code through a user-material subroutine and is well suited to deal with numerically stiff constitutive equations. This is accomplished through an automatic subincrementation procedure controlled by a maximum allowed equivalent inelastic strain increment per time step. For illustration purposes, two examples are discussed: (i) uniaxial test simulations to reveal the optimum combination of the user-specified tolerance and the prescribed load step size to obtain a desired accuracy at a minimum cost, (ii) a large-scale three-dimensional analysis of an integrated circuit (IC) package's solder joint to show the capability of the proposed procedure to deal with thermomechanical loading.

引用

页码：539 / 558

页数：20

共 20 条

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[3]

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[4]

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[7]

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[8]

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[9]

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[10]

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