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Effects of damage and thermal residu...

Liu, Haitao.

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Effects of damage and thermal residual stresses on the overall elastoplastic behavior of particle-reinforced metal matrix composites.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Effects of damage and thermal residual stresses on the overall elastoplastic behavior of particle-reinforced metal matrix composites./
作者:	Liu, Haitao.
面頁冊數:	211 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 1944.
Contained By:	Dissertation Abstracts International65-04B.
標題:	Applied Mechanics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3129319
ISBN:	0496765795

Effects of damage and thermal residual stresses on the overall elastoplastic behavior of particle-reinforced metal matrix composites.
Liu, Haitao.

Effects of damage and thermal residual stresses on the overall elastoplastic behavior of particle-reinforced metal matrix composites. - 211 p.

Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 1944.

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

The objective of the present study is to investigate damage mechanisms and thermal residual stresses of composites, and to establish the frameworks to model the particle-reinforced metal matrix composites with particle-matrix interfacial debonding, particle cracking or thermal residual stresses.

ISBN: 0496765795Subjects--Topical Terms:

1018410
Applied Mechanics.

Effects of damage and thermal residual stresses on the overall elastoplastic behavior of particle-reinforced metal matrix composites.
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245 1 0 $a Effects of damage and thermal residual stresses on the overall elastoplastic behavior of particle-reinforced metal matrix composites.
300 $a 211 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 1944.
500 $a Supervisors: Lizhi Sun; Han-Chin Wu.
502 $a Thesis (Ph.D.)--The University of Iowa, 2004.
520 $a The objective of the present study is to investigate damage mechanisms and thermal residual stresses of composites, and to establish the frameworks to model the particle-reinforced metal matrix composites with particle-matrix interfacial debonding, particle cracking or thermal residual stresses.
520 $a An evolutionary interfacial debonding model is proposed for the composites with spheroidal particles. The construction of the equivalent stiffness is based on the fact that when debonding occurs in a certain direction, the load-transfer ability will lose in that direction. By using this equivalent method, the interfacial debonding problem can be converted into a composite problem with perfectly bonded inclusions.
520 $a Considering the interfacial debonding is a progressive process in which the debonding area increases in proportion to external loading, a progressive interfacial debonding model is proposed. In this model, the relation between external loading and the debonding area is established using a normal stress controlled debonding criterion. Furthermore, an equivalent orthotropic stiffness tensor is constructed based on the debonding areas. This model is able to study the composites with randomly distributed spherical particles.
520 $a The double-inclusion theory is recalled to model the particle cracking problems. Cracks inside particles are treated as penny-shape particles with zero stiffness. The disturbed stress field due to the existence of a double-inclusion is expressed explicitly.
520 $a Finally, a thermal mismatch eigenstrain is introduced to simulate the inconsistent expansions of the matrix and the particles due to the difference of the coefficients of thermal expansion. Micromechanical stress and strain fields are calculated due to the combination of applied external loads and the prescribed thermal mismatch eigenstrains.
520 $a For all of the above models, ensemble-volume averaging procedures are employed to derive the effective yield function of the composites. Numerical simulations are performed to analyze the effects of various parameters and several good agreements between our model's predictions and experimental results are obtained. It should be mentioned that all of expressions in the frameworks are explicitly derived and these analytical results are easy to be adopted in other related investigations.
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790 1 0 $a Sun, Lizhi, $e advisor
790 1 0 $a Wu, Han-Chin, $e advisor
790 $a 0096
791 $a Ph.D.
792 $a 2004
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