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SKMBT_60010110901120

SKMBT_60010110901120 - Fall 2018 introduction to Composite...

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Unformatted text preview: Fall 2018 - introduction to Composite Materials- 3 credits Cross-Listed Course: MAE 4556, CECE 477i}, MSE 555%9 TAM 4550/5555} HW 8. Date due: November 9 Application of Maximum Stress Criterion Consider a cylindrical pressure vessel made of l j; 20/03,]S carbon fiber polymer composite subjected to internal pressure p. Each layer has 0.30mm thickness and the mean radius of the tube is 50 min. Use the maximum stress criterion to determine the maximum allowable pressure in kPa. What layer or layers controi failure? For analysis, lSt assume the pressure vessel subjected to a pressure p = 0t(l kPa), Where or is a multiplier. Use material properties given below {elastic properties same as in MW 7) E17: 125 GPa 132* 10 GPa V12: 025 G12“: 5 GPB. X? :lSOO MP3 KC :4250 MPa Y7 = 50 MPa Yc 2 "200 MPa S =10f) MPa Note: Lightweight composite pressure vessels are designed with thin metallic or plastic liners. Liners are non—load sharing types, therefore oniy the composite sustained an internal pressure. The liner provides a seal. Typically the high pressure cylinder has an aluminum liner and is wound with carbon, Kevlar or fiberglass. Composite pressure vessels have found unique place in industrial, commercial, research and defense applications due to their higher efficiency and good resistance under hard working conditions. The composite pressure vessels are about 70% lighter than steel vessels and about 30 to 50 % lighter than aiuminum vessels. ...
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