Simulation of low velocity impact damage on thin plate

• Main Authors: Hamid, Muhammad Najib Abdul, Rafi, Siti Zulaikha, Yusuf, Zainal Nazri Mohd, Teoh, Choe-Yung
• Format: Conference Proceeding
• Language: English
• Subjects: Coal; Coal-fired power plants; Computer simulation; Contact force; Damage assessment; Damage detection; Dynamic loads; Energy absorption; Finite element method; Flat plates; Free fall; Impact analysis; Impact damage; Impact velocity; Low carbon steels; Manganese steel; Manganese steels; Mechanical properties; Parameter identification; Shape memory alloys; Simulation; Steel plates; Thin plates; Velocity
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0178377

Low velocity impact is a massive problematic issue causing a damage to the thin plate from the dynamic impact velocity below than 10 m/s especially the impact effects of coal pulveriser at coal powerplant sector. This paper presents the damage behaviour of 11% Manganese Steel plate structures when subjected to dynamic loading at flat (0°) and oblique plate of 45°.and 60° at different height which means different velocity of free fall (6.26 m/s, 7.67m/s, 8.85m/s and 9.9m/s). Experimental was examine thoroughly from strain test using mild steel and simulation development to validate the strain result assigning mild steel properties in Abaqus. This procedure is vital for understanding validation methods procedure. Furthermore, 11% Manganese steel was applied corresponding with model simulation validation from literature by extracting the Mn-steel’s mechanical properties from the previous researcher work. After the validation, the geometry was altered based on actual situation of coal impact and thin plate dimension for further damage impact analysis. Finite element Analysis (FEA) was built generally for validation purposed and damage analysis by identified several parameters that influence the result. Flat plate, 0° at the highest velocity 9.9 m/s create significant damage based on highly mass loss compare to others variable because has a greater contact force and energy absorption of Mn-steel plate. Other than that, thickness modification was generated to reduce the damage where 10 mm minimize the damage up to 0.8% of the first impact whereas different material set-up was utilized from Shape Memory alloys (SMA) that cause no visibly damage at all due to high fracture-resistance.