Optimizing Dome Thickness to Enhance Gravimetric Efficiency in High-Pressure Composite Vessels.
Topic(s) : Manufacturing
Co-authors :
Mansingh MANSINGH YADAV (INDIA), Chaitanya CHAITANYA APTE (INDIA), Nitesh NITESH P. YELVE (INDIA), Thomas THOMAS GRIES , Asim ASIM TEWARIAbstract :
Pressure vessels play an important role in various engineering applications, with the optimization of their design being paramount to achieving a balance between structural integrity and weight reduction. This study focuses on enhancing the gravimetric efficiency of composite pressure vessels by optimizing dome thickness.
A solid modeling approach is employed, incorporating a cylindrical portion of the same dimensions and a dome contour created using a spline with 10 points. The process begins with an initial thickness of 5mm, generating a cross-section of half the pressure vessel that is then rotated to form the solid volume. By monitoring equivalent stresses on the nodes of the inner and outer dome contours, thickness adjustments are made in high-stress regions through modifications to spline points.
This approach extends to include composite layers, controlling winding angle and layer thickness using the section data of layered elements. In the dome region, thickness and angle vary at every point, with data extracted from the CAM software Cadfil. The extracted data is utilized in the PyMAPDL simulation to conduct multiple iterations of different winding angles and thicknesses, assessing their effects on the dome of the pressure vessel. The goal is to find an optimum layup sequence that utilizes the least material while protecting the dome.
Its findings reveal that, for the inner side of the dome, stress concentration occurs near the transition of the dome and cylinder, necessitating increased material in that region. Conversely, on the outer side of the dome, high stresses are observed near the tip, requiring additional thickness in that specific area. This comprehensive approach to thickness optimization in pressure vessel design presents a practical method for achieving weight reduction while ensuring structural integrity. This contributes significantly to the advancement of composite pressure vessel technology. This study is all about making composite pressure vessels better. Composite pressure vessels are important in many fields, like the automobile and aviation industries, to store compressed hydrogen gas. The goal is to make them lighter without compromising safety. The study shows that by adjusting the thickness in specific areas, it can make pressure vessels more efficient.
A solid modeling approach is employed, incorporating a cylindrical portion of the same dimensions and a dome contour created using a spline with 10 points. The process begins with an initial thickness of 5mm, generating a cross-section of half the pressure vessel that is then rotated to form the solid volume. By monitoring equivalent stresses on the nodes of the inner and outer dome contours, thickness adjustments are made in high-stress regions through modifications to spline points.
This approach extends to include composite layers, controlling winding angle and layer thickness using the section data of layered elements. In the dome region, thickness and angle vary at every point, with data extracted from the CAM software Cadfil. The extracted data is utilized in the PyMAPDL simulation to conduct multiple iterations of different winding angles and thicknesses, assessing their effects on the dome of the pressure vessel. The goal is to find an optimum layup sequence that utilizes the least material while protecting the dome.
Its findings reveal that, for the inner side of the dome, stress concentration occurs near the transition of the dome and cylinder, necessitating increased material in that region. Conversely, on the outer side of the dome, high stresses are observed near the tip, requiring additional thickness in that specific area. This comprehensive approach to thickness optimization in pressure vessel design presents a practical method for achieving weight reduction while ensuring structural integrity. This contributes significantly to the advancement of composite pressure vessel technology. This study is all about making composite pressure vessels better. Composite pressure vessels are important in many fields, like the automobile and aviation industries, to store compressed hydrogen gas. The goal is to make them lighter without compromising safety. The study shows that by adjusting the thickness in specific areas, it can make pressure vessels more efficient.