Deformation response of Areca catechu palm leaf-sheath under biaxial stretching is evaluated using Limiting Dome Height (LDH) testing. It is shown that the leaf material has high formability, with biaxial limit strains ~ 0.4, comparable to that of ductile sheet metals. Hydration of the leaf-sheath prior to the forming increases the limit strains by approximately 500% and lowers deformation forces by up to 85%. The potential of the LDH test for characterizing the stretch-forming response of plant materials is also demonstrated. Implications for single-step forming of plant leaf materials into products and manufacturing of eco-friendly foodware are discussed.
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The data that support the findings of this study are available from the corresponding author upon reasonable request.
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The authors would like to acknowledge B.V. Prashanth Kumar for arranging an industrial visit to Omkara Ventures, Tumkur, India and for showing us the commercial areca-leaf forming process. The work was supported in part by NSF CMMI Award 2100568.
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We declare we do not have any conflict of interest.
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Mohanty, D.P., Udupa, A., Anilchandra, A.R. et al. A study of formability of palm leaf materials using Limiting Dome Height testing. MRS Communications 11, 662–668 (2021). https://doi.org/10.1557/s43579-021-00094-0