Design and fabrication of submerged cylindrical laminates—I

✍ Scribed by George J. Dvorak; Petr Prochazka; Mullahalli V. Srinivas

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 962 KB
• Volume: 36
• Category: Article
• ISSN: 0020-7683
• DOI: 10.1016/s0020-7683(98)00181-4

✦ Synopsis

This is the _rst of a two!part paper concerned with both structural and fabrication process design of a closed!end laminated composite cylinder intended for service in deep sea environment[ The cylinder is made of many di}erent orthotropic layers and is loaded by uniform\ axisymmetric surface tractions[ In addition\ piecewise uniform eigenstrains and residual stresses may be caused in the layers during fabrication\ by _ber prestress for waviness reduction and by piecewise uniform changes in temperature[ The overall goal is to assure e.cient use of the composite structure under a prescribed hydrostatic pressure\ and to select _ber prestress distribution such that the total stresses in the plies do not exceed certain strength magnitudes[ Mechanical and residual stresses in the layers are evaluated with mechanical and transformation in~uence functions[ For the proportional loading applied by a hydrostatic pressure\ a procedure is outlined for design of several layups such that the cylinder wall experiences an isotropic in!plane strain and\ therefore\ all layers support the same compressive normal stresses\ regardless of _ber orientation[ The results are applied in design and analysis stress _elds in a speci_c structure[ Fabrication process design is discussed in the second part of the paper "Srinivas et al [\ 0888\ Int[ J[ Solids Structures\ 25\ 2834Ð2865#[ Þ 0888 Elsevier Science Ltd[ All rights reserved