Design, manufacturing, and testing of a variable stiffness composite cylinder

Abstract Fiber steering is one of the promising capabilities of Automated Fiber Placement (AFP) technology in manufacturing of advanced composite structures with spatially tailored properties. The so-called variable stiffness (VS) composites have considerable scope to outperform their traditionally made constant stiffness (CS) counterparts. However, there are several design and manufacturing challenges to be addressed before practically using them as structural components. In this work we demonstrate the design, manufacturing and testing procedure of a variable stiffness (VS) composite cylinder made by fiber steering. The improved bending-induced buckling performance is the objective of the VS cylinder to be compared with its CS counterpart. The experimental results show that the buckling capacity of the VS cylinder is about 18.5% higher than its CS counterpart.

[1]  Damiano Pasini,et al.  Optimum stacking sequence design of composite materials Part II: Variable stiffness design , 2010 .

[2]  Zafer Gürdal,et al.  Progressive failure analysis of tow-placed, variable-stiffness composite panels , 2007 .

[3]  Zafer Gürdal,et al.  Optimal Design of Tow-Placed Fuselage Panels for Maximum Strength with Buckling Considerations , 2010 .

[4]  Michael W. Hyer,et al.  Use of Material Tailoring to Improve Buckling Capacity of Elliptical Composite Cylinders , 2007 .

[5]  Paul M. Weaver,et al.  Stiffness tailoring of elliptical composite cylinders for axial buckling performance , 2016 .

[6]  A. Blom,et al.  Structural Performance of Fiber-Placed, Variable-Stiffness Composite Conical and Cylindrical Shells , 2010 .

[7]  Mohammad Rouhi,et al.  Computational efficiency and accuracy of multi-step design optimization method for variable stiffness composite structures , 2017 .

[8]  K. Potter,et al.  The engineering aspects of automated prepreg layup: History, present and future , 2012 .

[9]  Christos Kassapoglou,et al.  Generating realistic laminate fiber angle distributions for optimal variable stiffness laminates , 2012 .

[10]  Z. Gürdal,et al.  Design, manufacturing and testing of a fibre steered panel with a large cut-out , 2017 .

[11]  Tsuyoshi Murata,et al.  {m , 1934, ACML.

[12]  Mohammad Rouhi,et al.  The effect of the percentage of steered plies on the bending-induced buckling performance of a variable stiffness composite cylinder , 2015 .

[13]  Paul M. Weaver,et al.  Bend-free shells under uniform pressure with variable-angle tow derived anisotropy , 2012 .

[14]  Ramy Harik,et al.  Maturity assessment of the laminate variable stiffness design process , 2017 .

[15]  Zafer Gürdal,et al.  Fiber path definitions for elastically tailored conical shells , 2009 .

[16]  Suong V. Hoa,et al.  Effect of structural parameters on design of variable-stiffness composite cylinders made by fiber steering , 2014 .

[17]  Zafer Gürdal,et al.  Circumferential stiffness tailoring of general cross section cylinders for maximum buckling load with strength constraints , 2012 .

[18]  M. W. Hyer,et al.  Use of curvilinear fiber format in composite structure design , 1991 .

[19]  Jerzy Warminski,et al.  A review on the mechanical behaviour of curvilinear fibre composite laminated panels , 2014 .

[20]  M. Hojjati,et al.  Use of curvilinear fibers for improved bending-induced buckling capacity of elliptical composite cylinders , 2017 .

[21]  Mohammad Rouhi,et al.  Multi-objective design optimization of variable stiffness composite cylinders , 2015 .

[22]  Simon Astwood,et al.  A review on design for manufacture of variable stiffness composite laminates , 2016 .

[23]  K. Wu,et al.  Post-buckling analyses of variable-stiffness composite cylinders in axial compression , 2015 .

[24]  Zafer Gürdal,et al.  Optimization of a composite cylinder under bending by tailoring stiffness properties in circumferential direction , 2010 .