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Constitutive modeling of joining mat...

Dube, Manu.

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Constitutive modeling of joining materials in electronic packaging.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Constitutive modeling of joining materials in electronic packaging./
Author:	Dube, Manu.
Description:	324 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-01, Section: B, page: 0280.
Contained By:	Dissertation Abstracts International65-01B.
Subject:	Applied Mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3119941

Constitutive modeling of joining materials in electronic packaging.
Dube, Manu.

Constitutive modeling of joining materials in electronic packaging. - 324 p.

Source: Dissertation Abstracts International, Volume: 65-01, Section: B, page: 0280.

Thesis (Ph.D.)--The University of Arizona, 2004.

Modeling simplifications for complex material behavior may lead to unanticipated errors under generalized loading conditions, which are difficult to detect in finite element analyses. This work analyzes existing models under simple loading conditions where the nature of the results is known a priori, and proposes new models to overcome the limitations detected. Elastic and elastoplastic formulations for loading-dependent material parameters are generalized, and limitations of the rate-dependent elastoplastic simulation and the Perzyna viscoplastic formulation are discussed. A yield function that provides continuous yielding irrespective of the direction of loading and does not generate spurious plastic strain increments under temperature change is developed. A thermomechanical model based on the concept of superposition of asymptotic phases is also proposed, with generalized stress-strain-temperature relationships that intrinsically predict the variation of the coefficient of thermal expansion and elastic constants with temperature, and is validated for aluminum, lead, tin and solder. A plastic yield criterion shown to be in general agreement with hardening based on dislocation density and a preliminary empirical creep equation for lead-tin eutectic solder are developed as part of the thermomechanical model. Finally an approximate dissipated-work based formulation for the Disturbed State Concept of Desai (2001) is developed and limitations of DSC assumptions are discussed. Validations are conducted for the eutectic lead-tin data of Wang et al. (2001), with prior parameters being shown to require recomputation.Subjects--Topical Terms:

1018410
Applied Mechanics.

Constitutive modeling of joining materials in electronic packaging.
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100 1 $a Dube, Manu. $3 1900492
245 1 0 $a Constitutive modeling of joining materials in electronic packaging.
300 $a 324 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-01, Section: B, page: 0280.
500 $a Director: Tribikram Kundu.
502 $a Thesis (Ph.D.)--The University of Arizona, 2004.
520 $a Modeling simplifications for complex material behavior may lead to unanticipated errors under generalized loading conditions, which are difficult to detect in finite element analyses. This work analyzes existing models under simple loading conditions where the nature of the results is known a priori, and proposes new models to overcome the limitations detected. Elastic and elastoplastic formulations for loading-dependent material parameters are generalized, and limitations of the rate-dependent elastoplastic simulation and the Perzyna viscoplastic formulation are discussed. A yield function that provides continuous yielding irrespective of the direction of loading and does not generate spurious plastic strain increments under temperature change is developed. A thermomechanical model based on the concept of superposition of asymptotic phases is also proposed, with generalized stress-strain-temperature relationships that intrinsically predict the variation of the coefficient of thermal expansion and elastic constants with temperature, and is validated for aluminum, lead, tin and solder. A plastic yield criterion shown to be in general agreement with hardening based on dislocation density and a preliminary empirical creep equation for lead-tin eutectic solder are developed as part of the thermomechanical model. Finally an approximate dissipated-work based formulation for the Disturbed State Concept of Desai (2001) is developed and limitations of DSC assumptions are discussed. Validations are conducted for the eutectic lead-tin data of Wang et al. (2001), with prior parameters being shown to require recomputation.
590 $a School code: 0009.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Engineering, Electronics and Electrical. $3 626636
690 $a 0346
690 $a 0548
690 $a 0544
710 2 0 $a The University of Arizona. $3 1017508
773 0 $t Dissertation Abstracts International $g 65-01B.
790 1 0 $a Kundu, Tribikram, $e advisor
790 $a 0009
791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3119941