Mechanical behavior of unidirectional SiC/Ti composites subjected to off-axis loading at elevated temperatures

M. M. Aghdam, S. R. Morsali, S. M A Hosseini, M. Sadighi

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)
1 Downloads (Pure)

Abstract

A micromechanical approach is used to study the damage initiation and nonlinear behavior of SiC/Ti composites subjected to a general complicated off-axis loading at elevated service temperatures. The effects of stress relaxation, interface damage together with fiber coating are considered. A cohesive zone model is applied to define the imperfect interface between the fiber and matrix. Introducing a unique failure criterion for all loading angles at different elevated service temperatures may be considered as the main contribution of this study. In order to simultaneously apply a combination of mechanical loadings and thermal residual stresses, appropriate periodic boundary conditions are imposed on the model. Predictions of the presented model show acceptable correlation with the reported experimental data at elevated temperatures. Results reveal that by increasing the service temperature, the strength of the composite is linearly degraded at fast rate especially at loading angles of 20° and 30°.

Original languageEnglish
Pages (from-to)244-249
Number of pages6
JournalMaterials science & engineering A
Volume688
DOIs
Publication statusPublished - 14 Mar 2017

Fingerprint

composite materials
Composite materials
damage
Temperature
fibers
temperature
Fibers
stress relaxation
Stress relaxation
thermal stresses
Thermal stress
residual stress
Residual stresses
Boundary conditions
boundary conditions
coatings
Coatings
matrices
predictions

Keywords

  • Cohesive interface failure
  • Elevated temperature
  • Metal Matrix Composites (MMCs)
  • Micromechanics
  • Off-axis loading, Finite element analysis

Cite this

@article{3b1ef715732948a887d5d95ca823c7a7,
title = "Mechanical behavior of unidirectional SiC/Ti composites subjected to off-axis loading at elevated temperatures",
abstract = "A micromechanical approach is used to study the damage initiation and nonlinear behavior of SiC/Ti composites subjected to a general complicated off-axis loading at elevated service temperatures. The effects of stress relaxation, interface damage together with fiber coating are considered. A cohesive zone model is applied to define the imperfect interface between the fiber and matrix. Introducing a unique failure criterion for all loading angles at different elevated service temperatures may be considered as the main contribution of this study. In order to simultaneously apply a combination of mechanical loadings and thermal residual stresses, appropriate periodic boundary conditions are imposed on the model. Predictions of the presented model show acceptable correlation with the reported experimental data at elevated temperatures. Results reveal that by increasing the service temperature, the strength of the composite is linearly degraded at fast rate especially at loading angles of 20° and 30°.",
keywords = "Cohesive interface failure, Elevated temperature, Metal Matrix Composites (MMCs), Micromechanics, Off-axis loading, Finite element analysis",
author = "Aghdam, {M. M.} and Morsali, {S. R.} and Hosseini, {S. M A} and M. Sadighi",
year = "2017",
month = "3",
day = "14",
doi = "10.1016/j.msea.2017.01.108",
language = "English",
volume = "688",
pages = "244--249",
journal = "Materials science & engineering A",
issn = "0921-5093",
publisher = "Elsevier",

}

Mechanical behavior of unidirectional SiC/Ti composites subjected to off-axis loading at elevated temperatures. / Aghdam, M. M.; Morsali, S. R.; Hosseini, S. M A; Sadighi, M.

In: Materials science & engineering A, Vol. 688, 14.03.2017, p. 244-249.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Mechanical behavior of unidirectional SiC/Ti composites subjected to off-axis loading at elevated temperatures

AU - Aghdam, M. M.

AU - Morsali, S. R.

AU - Hosseini, S. M A

AU - Sadighi, M.

PY - 2017/3/14

Y1 - 2017/3/14

N2 - A micromechanical approach is used to study the damage initiation and nonlinear behavior of SiC/Ti composites subjected to a general complicated off-axis loading at elevated service temperatures. The effects of stress relaxation, interface damage together with fiber coating are considered. A cohesive zone model is applied to define the imperfect interface between the fiber and matrix. Introducing a unique failure criterion for all loading angles at different elevated service temperatures may be considered as the main contribution of this study. In order to simultaneously apply a combination of mechanical loadings and thermal residual stresses, appropriate periodic boundary conditions are imposed on the model. Predictions of the presented model show acceptable correlation with the reported experimental data at elevated temperatures. Results reveal that by increasing the service temperature, the strength of the composite is linearly degraded at fast rate especially at loading angles of 20° and 30°.

AB - A micromechanical approach is used to study the damage initiation and nonlinear behavior of SiC/Ti composites subjected to a general complicated off-axis loading at elevated service temperatures. The effects of stress relaxation, interface damage together with fiber coating are considered. A cohesive zone model is applied to define the imperfect interface between the fiber and matrix. Introducing a unique failure criterion for all loading angles at different elevated service temperatures may be considered as the main contribution of this study. In order to simultaneously apply a combination of mechanical loadings and thermal residual stresses, appropriate periodic boundary conditions are imposed on the model. Predictions of the presented model show acceptable correlation with the reported experimental data at elevated temperatures. Results reveal that by increasing the service temperature, the strength of the composite is linearly degraded at fast rate especially at loading angles of 20° and 30°.

KW - Cohesive interface failure

KW - Elevated temperature

KW - Metal Matrix Composites (MMCs)

KW - Micromechanics

KW - Off-axis loading, Finite element analysis

UR - http://www.scopus.com/inward/record.url?scp=85011796884&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2017.01.108

DO - 10.1016/j.msea.2017.01.108

M3 - Article

VL - 688

SP - 244

EP - 249

JO - Materials science & engineering A

JF - Materials science & engineering A

SN - 0921-5093

ER -