The paper "The Kresling origami spring: a review and assessment" by Ravindra Masana, Ahmed S Dalaq, Shadi Khazaaleh, and Mohammed F Daqqa provides a comprehensive review of the literature on Kresling origami springs (KOSs) and their applications in engineering. The Kresling pattern, discovered in 1993, is a non-rigid origami pattern that exhibits unique characteristics such as multi-stability, tunable stiffness, and axial/twist motion coupling. These properties make KOSs suitable for various applications, including robotics, aerospace structures, metamaterials, and energy harvesting. The authors aim to facilitate future research by summarizing and categorizing current literature, identifying shortcomings, and proposing directions for improvement. They discuss the fabrication methods of KOSs, including sheet-based and non-sheet fabrication techniques, and assess their advantages and drawbacks. Sheet-based methods involve manual folding, embossing, laminating, and subtractive approaches like laser etching and CNC machining. Non-sheet methods, such as molding, winding, casting, and additive manufacturing, offer more automated and repeatable processes but may have limitations in terms of cost and scalability. The paper also reviews modeling approaches for KOSs, focusing on quasi-static and dynamic behavior. The truss model, which treats each triangular panel as a truss element, is discussed, along with its limitations and modifications to account for nonlinear behaviors. The authors highlight the need for advanced manufacturing technologies, particularly 3D printing, to achieve desired restoring force characteristics and minimize stresses during deployment. They also suggest exploring the integration of active elements, such as piezoelectric or magnetostrictive materials, to enhance actuation and sensing capabilities. Overall, the review emphasizes the potential of KOSs in engineering design and identifies areas for future research to address current challenges and expand their applications.The paper "The Kresling origami spring: a review and assessment" by Ravindra Masana, Ahmed S Dalaq, Shadi Khazaaleh, and Mohammed F Daqqa provides a comprehensive review of the literature on Kresling origami springs (KOSs) and their applications in engineering. The Kresling pattern, discovered in 1993, is a non-rigid origami pattern that exhibits unique characteristics such as multi-stability, tunable stiffness, and axial/twist motion coupling. These properties make KOSs suitable for various applications, including robotics, aerospace structures, metamaterials, and energy harvesting. The authors aim to facilitate future research by summarizing and categorizing current literature, identifying shortcomings, and proposing directions for improvement. They discuss the fabrication methods of KOSs, including sheet-based and non-sheet fabrication techniques, and assess their advantages and drawbacks. Sheet-based methods involve manual folding, embossing, laminating, and subtractive approaches like laser etching and CNC machining. Non-sheet methods, such as molding, winding, casting, and additive manufacturing, offer more automated and repeatable processes but may have limitations in terms of cost and scalability. The paper also reviews modeling approaches for KOSs, focusing on quasi-static and dynamic behavior. The truss model, which treats each triangular panel as a truss element, is discussed, along with its limitations and modifications to account for nonlinear behaviors. The authors highlight the need for advanced manufacturing technologies, particularly 3D printing, to achieve desired restoring force characteristics and minimize stresses during deployment. They also suggest exploring the integration of active elements, such as piezoelectric or magnetostrictive materials, to enhance actuation and sensing capabilities. Overall, the review emphasizes the potential of KOSs in engineering design and identifies areas for future research to address current challenges and expand their applications.