Sabri Mohammed M, A. Salal D. Numerical Analysis of Natural Frequency for U-Shaped Expansion Bellows in Fixed-Fixed and Fixed-Free Conditions. DJES [Internet]. 2022 Sep. 1 [cited 2024 Jul. 7];15(3):106-1. Available from: https://mail.djes.info/index.php/djes/article/view/937