Identification of in-plane elastic constants of composite laminates using measured strains

Tai-Yan Kam; C. H. Lin; W. T. Wang

Identification of in-plane elastic constants of composite laminates using measured strains

Tai-Yan Kam^*, C. H. Lin, W. T. Wang

^*Corresponding author for this work

Department of Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A method for nondestructive evaluation of material constants of composite laminates is presented. An error function is established to measure the differences between the theoretically and experimentally predicted strains. The identification of the material constants is formulated as a constrained minimization problem in which the material constants are determined to make the error function a global minimum. A global minimization method together with a technique for normalizing the gradient of the objective function are used to solve the above minimization problem. The applications of the proposed method are demonstrated by means of several examples on the material constants identification of laminated composite cylindrical pressure vessels.

Original language	English
Title of host publication	American Society of Mechanical Engineers, Materials Division (Publication) MD
Publisher	ASME
Pages	141-146
Number of pages	6
Volume	86
ISBN (Print)	0791816419
State	Published - 1 Dec 1999
Event	Durability and Damage Tolerance of Composite Materials and Structures - 1999 (The ASME International Mechanical Engineering Congress and Exposition) - Nashville, TN, USA Duration: 14 Nov 1999 → 19 Nov 1999

Conference

Conference	Durability and Damage Tolerance of Composite Materials and Structures - 1999 (The ASME International Mechanical Engineering Congress and Exposition)
City	Nashville, TN, USA
Period	14/11/99 → 19/11/99

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title = "Identification of in-plane elastic constants of composite laminates using measured strains",

abstract = "A method for nondestructive evaluation of material constants of composite laminates is presented. An error function is established to measure the differences between the theoretically and experimentally predicted strains. The identification of the material constants is formulated as a constrained minimization problem in which the material constants are determined to make the error function a global minimum. A global minimization method together with a technique for normalizing the gradient of the objective function are used to solve the above minimization problem. The applications of the proposed method are demonstrated by means of several examples on the material constants identification of laminated composite cylindrical pressure vessels.",

author = "Tai-Yan Kam and Lin, {C. H.} and Wang, {W. T.}",

year = "1999",

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Kam, T-Y, Lin, CH & Wang, WT 1999, Identification of in-plane elastic constants of composite laminates using measured strains. in American Society of Mechanical Engineers, Materials Division (Publication) MD. vol. 86, ASME, pp. 141-146, Durability and Damage Tolerance of Composite Materials and Structures - 1999 (The ASME International Mechanical Engineering Congress and Exposition), Nashville, TN, USA, 14/11/99.

TY - GEN

T1 - Identification of in-plane elastic constants of composite laminates using measured strains

AU - Kam, Tai-Yan

AU - Lin, C. H.

AU - Wang, W. T.

PY - 1999/12/1

Y1 - 1999/12/1

N2 - A method for nondestructive evaluation of material constants of composite laminates is presented. An error function is established to measure the differences between the theoretically and experimentally predicted strains. The identification of the material constants is formulated as a constrained minimization problem in which the material constants are determined to make the error function a global minimum. A global minimization method together with a technique for normalizing the gradient of the objective function are used to solve the above minimization problem. The applications of the proposed method are demonstrated by means of several examples on the material constants identification of laminated composite cylindrical pressure vessels.

AB - A method for nondestructive evaluation of material constants of composite laminates is presented. An error function is established to measure the differences between the theoretically and experimentally predicted strains. The identification of the material constants is formulated as a constrained minimization problem in which the material constants are determined to make the error function a global minimum. A global minimization method together with a technique for normalizing the gradient of the objective function are used to solve the above minimization problem. The applications of the proposed method are demonstrated by means of several examples on the material constants identification of laminated composite cylindrical pressure vessels.

UR - http://www.scopus.com/inward/record.url?scp=0033295520&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0033295520

SN - 0791816419

VL - 86

SP - 141

EP - 146

BT - American Society of Mechanical Engineers, Materials Division (Publication) MD

PB - ASME

Y2 - 14 November 1999 through 19 November 1999

ER -

Identification of in-plane elastic constants of composite laminates using measured strains

Abstract

Conference

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