Thermoelastic analysis of composite CVD SiC fibers

Edgar Lara-Curzio; S. S. Sternstein

doi:10.1016/0266-3538(93)90160-I

Thermoelastic analysis of composite CVD SiC fibers

Edgar Lara-Curzio, S. S. Sternstein

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

A thermoelastic model has been developed for the prediction of the state of stress of composite fibers when subjected to thermomechanical loads. The model is based on a system of four infinitely long and perfectly bonded concentric cylinders. Predictions are presented for composite fibers produced by chemical vapor deposition (CVD), and in particular for the SCS-6 fiber, for which it is found that neglecting the strains that the substrate experiences during CVD in the calculations, can lead to severe underestimates of the magnitude of the predicted residual stresses. Relationships are established between the predicted state of stress and experimentally observed changes of strength with temperature, stress thresholds in creep and structural defects such as debonding at the interfaces for the SCS-6 filter.

Original language	English
Pages (from-to)	265-275
Number of pages	11
Journal	Composites Science and Technology
Volume	46
Issue number	3
DOIs	https://doi.org/10.1016/0266-3538(93)90160-I
State	Published - 1993
Externally published	Yes

Funding

The authors gratefulalyc knowledgeth e financial supporto f the DefenseA dvancedR esearchP rojects Agency and the Office of Naval Researchu nder contracNt o. N-00014-86-K-0773.

Funders	Funder number
DefenseA dvancedR esearchP rojects Agency
Office of Naval Researchu	N-00014-86-K-0773

Keywords

composite fibers
fibers
silicon carbide fibers
thermal expansion
thermal stresses
thermoelastic analysis

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10.1016/0266-3538(93)90160-I

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title = "Thermoelastic analysis of composite CVD SiC fibers",

abstract = "A thermoelastic model has been developed for the prediction of the state of stress of composite fibers when subjected to thermomechanical loads. The model is based on a system of four infinitely long and perfectly bonded concentric cylinders. Predictions are presented for composite fibers produced by chemical vapor deposition (CVD), and in particular for the SCS-6 fiber, for which it is found that neglecting the strains that the substrate experiences during CVD in the calculations, can lead to severe underestimates of the magnitude of the predicted residual stresses. Relationships are established between the predicted state of stress and experimentally observed changes of strength with temperature, stress thresholds in creep and structural defects such as debonding at the interfaces for the SCS-6 filter.",

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doi = "10.1016/0266-3538(93)90160-I",

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T1 - Thermoelastic analysis of composite CVD SiC fibers

AU - Lara-Curzio, Edgar

AU - Sternstein, S. S.

PY - 1993

Y1 - 1993

N2 - A thermoelastic model has been developed for the prediction of the state of stress of composite fibers when subjected to thermomechanical loads. The model is based on a system of four infinitely long and perfectly bonded concentric cylinders. Predictions are presented for composite fibers produced by chemical vapor deposition (CVD), and in particular for the SCS-6 fiber, for which it is found that neglecting the strains that the substrate experiences during CVD in the calculations, can lead to severe underestimates of the magnitude of the predicted residual stresses. Relationships are established between the predicted state of stress and experimentally observed changes of strength with temperature, stress thresholds in creep and structural defects such as debonding at the interfaces for the SCS-6 filter.

AB - A thermoelastic model has been developed for the prediction of the state of stress of composite fibers when subjected to thermomechanical loads. The model is based on a system of four infinitely long and perfectly bonded concentric cylinders. Predictions are presented for composite fibers produced by chemical vapor deposition (CVD), and in particular for the SCS-6 fiber, for which it is found that neglecting the strains that the substrate experiences during CVD in the calculations, can lead to severe underestimates of the magnitude of the predicted residual stresses. Relationships are established between the predicted state of stress and experimentally observed changes of strength with temperature, stress thresholds in creep and structural defects such as debonding at the interfaces for the SCS-6 filter.

KW - composite fibers

KW - fibers

KW - silicon carbide fibers

KW - thermal expansion

KW - thermal stresses

KW - thermoelastic analysis

UR - http://www.scopus.com/inward/record.url?scp=0027334118&partnerID=8YFLogxK

U2 - 10.1016/0266-3538(93)90160-I

DO - 10.1016/0266-3538(93)90160-I

M3 - Article

AN - SCOPUS:0027334118

SN - 0266-3538

VL - 46

SP - 265

EP - 275

JO - Composites Science and Technology

JF - Composites Science and Technology

IS - 3

ER -

Thermoelastic analysis of composite CVD SiC fibers

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