Effect of Layer Height on Tenile Strength of Fused Deposited Modeling Printed Carbon Poly-Lactic Acid Part

Sumitkumar Y Patel, Dr. Chaitanya K. Desai
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Abstract

Fused deposition modelling (FDM) is an additive manufacturing process that creates objects by depositing successive layers of material. FDM is the most widely used additive manufacturing process because of its ability to create complex geometries. Various FDM process parameter affects the mechanical property of FDM objects. The main objective of this paper to stud the layer height of specimens, one of the important process parameter, build using Carbon poly-lactic acid part(C-PLA) with FDM process. For that Dogbone specimens as per ASTM D638-14 standard prepared using FDM process with three different layer height(h) of 0.12 mm, 0.23 mm and 0.35 mm. Three different sets of specimens with 0 0 ,450 , 900 raster orientation (θ) were printed using FDM process. Then specimens were tested on UTM machine to evaluate ultimate tensile strength for all specimens. Results show that high tensile strength found for lower layer height specimens compare to higher layer height specimens. Keywords: Fused deposition modeling, Tensile strength, Elastic modulus,PLA
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层高对熔融沉积模型打印碳聚乳酸部件韧性强度的影响
熔融沉积建模(FDM)是一种快速成型制造工艺,通过连续沉积材料层来制造物体。FDM 是应用最广泛的快速成型制造工艺,因为它能够制造复杂的几何形状。各种 FDM 工艺参数会影响 FDM 物体的机械性能。本文的主要目的是研究试样的层高,这是使用 FDM 工艺制造碳聚乳酸部件(C-PLA)的重要工艺参数之一。为此,根据 ASTM D638-14 标准,使用 FDM 工艺制备了狗骨试样,试样有三种不同的层高(h),分别为 0.12 毫米、0.23 毫米和 0.35 毫米。使用 FDM 工艺打印了 0 0、450 和 900 光栅方向 (θ) 的三组不同试样。然后在 UTM 机上对试样进行测试,以评估所有试样的极限抗拉强度。结果表明,与层高较高的试样相比,层高较低的试样抗拉强度较高。关键词熔融沉积模型 拉伸强度 弹性模量 聚乳酸
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