Dual-Notch Void Model to Explain the Anisotropic Strengths of 3D Printed Polymers

Based on the unique additive manufacturing process, a dual-notch void model is proposed to explain three tensile strengths of a 3D printed polymer along three major directions. This model incorporates the strength/notch angle relation and provides a relative magnitude of three tensile strengths, i.e., S-x (axial strength) > S-y (transverse strength) >= S-z (inter-layer strength).