Composite materials have steadily gained recognition worldwide for its uses in various sectors such as aerospace,
infrastructures and automotive industries. Natural fibers are gaining recognition as a substitute to synthetic fibers due to its recyclability
and abundance. Palm fiber reinforced polypropylene composite panels have potential to be stamp formed in order to build complex
geometries. In stamp forming the most sensitive feature is elastic recovery during unloading. This phenomenon will affect the net
dimension of the final product. Objective: To identify the effects of forming rate, tool radius, temperature and ratio of fiber to
polypropylene on the spring-back of palm fiber composite. To deduce an empirical model in predicting spring-back. To investigate the
effect of fiber composition on its tensile strength. Results: Statistical analysis conducted shows all the studied parameters gives significant
effect towards spring-back. The higher the temperature, feed rate and fiber composition (up to 30wt %) the smaller the spring-back and it
is vice versa for tool radius. An empirical model was formulated to predict the spring-back angle. 30wt% of fiber composition was found
to give the highest tensile strength. Conclusion: The suggested temperature, fiber composition, tool radius and feed rate to get the smallest
spring-back angle in the current study are 150 °C, 30wt%, 2mm and 500mm/min. While the fiber composition of 30wt% shows the highest
tensile strength
