The Effects of Lamina Stacking Sequence on the Structural Response of Composite Laminates

Faculty Mentor

Awlad Hossain

Presentation Type

Oral Presentation

Start Date

5-7-2025 11:50 AM

End Date

5-7-2025 12:10 PM

Location

PUB 319

Primary Discipline of Presentation

Engineering

Abstract

Composites are lightweight engineered materials made of fiber and matrix. The fiber acts as the reinforcement, while the matrix holds the fibers together. Fiber-reinforced composite laminates are prepared by stacking single sheets of continuous fibers, called lamina or ply, in different orientations to achieve the desired strength and stiffness. The Lamina Stacking Sequence (LSS) represents the order these layers are stacked in a composite laminate. This research aims to numerically and experimentally investigate the effects of LSS on the structural response of composite laminates. For example, the [0/45/-45]s laminate represents a symmetric composite plate consisting of 6 laminae stacked at 0, 45, -45, -45, 45 and 0 degree orientations. These orientations ([0/45/-45]s, [0/-45/45]s, [45/-45/0]s, [-45/45/0]s, [45/0/-45]s, and [-45/0/45]s) represent the same laminate but with different LSS. In our research, we performed numerical simulations using the finite element analysis software ANSYS to study the structural response of a composite laminate defined by [0/45/-45]s with several LSS. We used the material properties of graphite and epoxy to simulate the fiber and matrix, respectively. These laminates were subjected to axial and bending loads to observe their structural response. Each laminate experienced the same stress and deformation when subjected to axial loads, but the results varied between LSS when subjected to bending loads. To verify these results, we performed experiments by printing composite laminates using PETG embedded with chopped carbon fiber. The tensile response of these laminates was found to be mostly consistent and invariant with LSS under axial loading.

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May 7th, 11:50 AM May 7th, 12:10 PM

The Effects of Lamina Stacking Sequence on the Structural Response of Composite Laminates

PUB 319

Composites are lightweight engineered materials made of fiber and matrix. The fiber acts as the reinforcement, while the matrix holds the fibers together. Fiber-reinforced composite laminates are prepared by stacking single sheets of continuous fibers, called lamina or ply, in different orientations to achieve the desired strength and stiffness. The Lamina Stacking Sequence (LSS) represents the order these layers are stacked in a composite laminate. This research aims to numerically and experimentally investigate the effects of LSS on the structural response of composite laminates. For example, the [0/45/-45]s laminate represents a symmetric composite plate consisting of 6 laminae stacked at 0, 45, -45, -45, 45 and 0 degree orientations. These orientations ([0/45/-45]s, [0/-45/45]s, [45/-45/0]s, [-45/45/0]s, [45/0/-45]s, and [-45/0/45]s) represent the same laminate but with different LSS. In our research, we performed numerical simulations using the finite element analysis software ANSYS to study the structural response of a composite laminate defined by [0/45/-45]s with several LSS. We used the material properties of graphite and epoxy to simulate the fiber and matrix, respectively. These laminates were subjected to axial and bending loads to observe their structural response. Each laminate experienced the same stress and deformation when subjected to axial loads, but the results varied between LSS when subjected to bending loads. To verify these results, we performed experiments by printing composite laminates using PETG embedded with chopped carbon fiber. The tensile response of these laminates was found to be mostly consistent and invariant with LSS under axial loading.