Iranian Journal of  Manufacturing Engineering

Iranian Journal of Manufacturing Engineering

Investigating the compressive strength of parts manufactured using the FDM method in a corrosive salt environment

Document Type : Original Article

Authors
Department of Mechanical Engineering, Kar Higher Education Institute, Qazvin, Iran
Abstract
Additive manufacturing is an advanced manufacturing method, one of which is FDM, which can produce parts from filaments with different materials. One of the most widely used components in various industries is lightweight grid structures that are formed by repeating unit cells and come in different sizes and designs that are also produced from recycled or environmentally friendly materials. In this paper, network structures were made by FDM with two different types of filaments: plain and carbon fiber-reinforced Polylactic Acid (PLA) with square unit cells. The printed samples were placed in three different environments for one week: air, ambient temperature seawater solution, and seawater solution using a plate heater above 45°C, and then a pressure test was performed on them. The results showed that the samples placed in high-temperature seawater solution had the highest compressive force, which was related to better adhesion of the layers due to high temperature, and placing the samples in ambient temperature sea salt solution caused a decrease in compressive force. Also, a higher compressive force was obtained for samples impregnated with plain PLA fibers, and adding carbon fibers to the filament base material caused a decrease in compressive force. The use of variable square hole patterns reduced the compressive strength, with the one-sided pattern showing a 67% reduction in strength in cold brine compared to the plain condition. The compressive strength of samples exposed to hot brine was on average 10% higher than that of similarly shaped samples in cold brine.
Keywords

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