PSI - Issue 81

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 81 (2026) 3–10

VIII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2025) Structural assessment of a ramp plate design for a water hyacinth collector using finite element approach Ahsan Anugrah Elbar a,b , Aprianur Fajri a , Aditya Rio Prabowo a, *, Iwan Istanto a , Martin Jurkovič c , Oleksiy Melnyk d , Svitlana Onyshchenko e , Ristiyanto Adiputra f , Seung Jun Baek g a Department of Mechanical Engineering, Universitas Sebelas Maret (UNS), Surakarta 57126, Indonesia b Laboratory of Design and Computational Mechanics, Faculty of Engineering, Universitas Sebelas Maret (UNS), Surakarta 57126, Indonesia

c Faculty of Operation and Economics of Transport and Communication, University of Žilina, Žilina 010 26, Slovakia d Department of Navigation and Maritime Safety, Odesa National Maritime University, Odesa 65029, Ukraine e Department of Fleet Operation and Shipping Technology, Odesa National Maritime University, Odesa 65029, Ukraine f Research Center for Hydrodynamics Technology, National Research and Innovation Agency (BRIN), Surabaya 60112, Indonesia g Advanced-Green Technology Center, Korea Marine Equipment Research Institute, Busan 49111, South Korea

© 2026 The Authors. Copy from the contract: Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2025 organizers Keywords: structural assessment, finite element analysis (FEA), multi-case optimization, load case variation, pitting corrosion. 1. Introduction Water hyacinth ( Eichhornia crassipes ) is a fast-growing invasive aquatic plant that can double its biomass within weeks, creating thick floating mats that disrupt water flow, clog irrigation systems, and interfere with fisheries (Malik, 2007). In Indonesia, this problem is particularly evident at the Cengklik Reservoir in Boyolali Regency, Central Java, where uncontrolled aquatic plant growth driven by nutrient enrichment from agriculture and aquaculture frequently requires mechanical removal to Abstract This investigation focuses on the structural assessment of an inclined support plate (commonly referred to as a ramp plate). This key structural member supports the trashbox on a vessel designed for collecting water hyacinth. To ensure performance reliability, a finite element analysis (FEA) was conducted to evaluate the structural response under a spectrum of operational loads, simulating trashbox fill levels from 50% to 150% of its nominal capacity. This analysis identified critical stress maxima and deformation trends, establishing a performance envelope for the design. To further assess durability under realistic service conditions, the structural model was subjected to a probabilistic pitting-corrosion simulation using a Monte Carlo approach. Corrosion depths of 10%, 20%, and 30% of plate thickness were applied to evaluate their effects on structural behavior. The results demonstrate good agreement between the analytical and numerical approaches, with a maximum deflection error of 5.93% and a safety factor remaining above 3, even under severe corrosion conditions.

* Corresponding author. Tel.: +62-271-632-163; fax: +62-271-632-163. E-mail address: aditya@ft.uns.ac.id

2452-3216 © 2026 The Authors. Copy from the contract: Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2025 organizers 10.1016/j.prostr.2026.03.002