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Nonlinear Random Vibration of Laminated Composite Plates by Comparison of Classical Theory, 1st and 3rd Order Shear Theories

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์ตœ์ดˆ๋“ฑ๋ก์ผ 2023.04.05 ์ตœ์ข…์ ฟ’์ž‘์ผ 2000.03
10P ๋ฏธ๋้ฉ๋ณด๊ธฐ
Nonlinear Random Vibration of Laminated Composite Plates by Comparison of Classical Theory, 1st and 3rd Order Shear Theories
  • * ๋ณธ ๋ฌธ์„œ๋Š” ๋ฐฐํฌ์šฉ์œผ๋กœ ๋ณต์‚ฌ ๋ฐ ํŽธ์ง‘์ด ๋ถˆ๊ฐ€ํ•ฉ๋‹ˆ๋‹ค.

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    ยท ์ˆ˜๋ก์ง€ ์ •๋ณด : ํ•œ๊ตญ์ „์‚ฐ๊ตฌ์กฐ๊ณตํ•™ํšŒ ๋…ผ๋ๅฉ์ง‘ / 13๊ถŒ / 1ํ˜ธ
    ยท ์ €์ž๋ช… : Kang, Joowon

    ์ดˆ๋ก

    ์ƒˆ๋กœ์šด ๊ณตํ•™์žฌ๋ฃŒ์˜ ํ•˜๋‚˜์ธ ๋ณตํ•ฉ์žฌ๋ฃŒ๋Š” ๋›ฐ์–ด๋‚œ ์—ญํ•™์  ์„ฑ์งˆ๋กœ ์ธํ•ด ๊ณตํ•™ ์ „ ๋ถ„์•ผ์— ๊ฑธ์ณ ์‚ฌ์šฉ์ด ์ ์ง„์ ์œผ๋กœ ์ฆ๊ฐ€ํ•˜๊ณ  ์žˆ๋‹ค. ์ด ๋ณตํ•ฉ์žฌ๋ฃŒ์— ๋Œ€ํ•œ ๊ฐœ๋ฐœ๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ์ •์  ํ˜น์€ ๋™์  ํ•˜์ค‘์„ ๋ฐ›๋Š” ๋ณตํ•ฉ ๊ตฌ์กฐ๋ฌผ์˜ ์—ฐ๊ตฌ๋Š” ๋งŽ์ด ์ˆ˜ํ–‰๋˜์–ด ์™”๊ณ  ๋Œ€๋ถ€๋ถ„ ๊ฐ€ํ•ด์ง€๋Š” ํ•˜์ค‘์€ ํ™•์ •์ ์ธ ๊ฒƒ์œผ๋กœ ๊ฐ€์ •๋˜์—ˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ์‹ค์ œ ๋งŽ์€ ์ƒํ™ฉ์— ์žˆ์–ด ๊ตฌ์กฐ๋ฌผ์— ๊ฐ€ํ•ด์ง€๋Š” ํ•˜์ค‘์˜ ์„ฑ์งˆ์€ ๋ถˆ๊ทœ์น™์ ์ด๋‹ค. ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ๋ถˆ๊ทœ์น™ ์ง„๋™์„ ๋ฐ›๋Š” ๋ณตํ•ฉ์ ์ธตํŒ์˜ ๋น„์„ ํ˜• ํ•ด์„์„ ์œ ํ•œ์š”์†Œ๋ฒ•์— ์˜๊ฑฐํ•˜์—ฌ ํ•ด์„ํ•˜์˜€์œผ๋ฉฐ ๊ณ ์ „ ํŒ ์ด๋ก ๊ณผ ์ „๋‹จ๋ณ€ํ˜•์„ ๊ณ ๋ คํ•œ 1์ฐจ, 3์ฐจ ์ด๋ก ์„ ๋น„๊ต ๋ถ„์„ํ•˜์˜€๋‹ค. ๋งŽ์€ ๋ณตํ•ฉ์žฌ๋ฃŒ๋“ค์€ ์ „๋‹จ ๋ณ€ํ˜•์— ์žˆ์–ด ์žฌ๋ฃŒ์ ์ธ ๋น„์„ ํ˜•์„ ๋‚˜ํƒ€๋‚ด๋ฏ€๋กœ ์ด๋ฅผ ๋ณธ ์—ฐ๊ตฌ์— ํฌํ•จํ•˜์˜€๋‹ค.

    ์˜์–ด์ดˆ๋ก

    Composites are finding increasing use in a wide variety of engineering applications due to their outstanding mechanical properties. A number of studies have focused on the development of new materials as well as the response of composite structures to static and dynamic loads by assuming the external driving forces to be deterministic. However, there are many situations in practice where the exciting forces vary randomly. In this work, the nonlinear response of laminated composite plates excited by stochastic loading is studied by the finite element method. Classical, first-order and third-order shear theories for plates are used in the finite element formulation. Since most composites exhibit significant nonlinearity in the shear stress-strain law, this is included in the present analysis.

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