Tensile properties of 3D-printed PLA prismatic cellular structures: an experimental investigation

被引:1
作者
Khan, Hashim [1 ]
Siddiqi, Muftooh ur Rehman [2 ]
Saher, Saim [3 ]
Riaz, Muhammad [4 ]
Rehan, Muhammad Saad [5 ]
机构
[1] CECOS Univ IT & Emerging Sci, Mech Engn Dept, Peshawar, Pakistan
[2] Aston Univ, Mech Biomed & Design Engn, Birmingham B4 7ET, England
[3] Ariston Energy Solut, Adv Mat Lab AML, Peshawar, Pakistan
[4] Univ Bahrain, Coll Engn, Mech Engn Dept, Isa Town, Bahrain
[5] Univ Engn & Technol, US Pakistan Ctr Adv Studies Energy, Peshawar, Pakistan
关键词
Cellular structure; Additive manufacturing; Cell size; Wall thickness; Fillet radius; Strength-to-weight ratio; LATTICE STRUCTURES; MECHANICAL-PROPERTIES; SOLID DISTRIBUTION; HONEYCOMB; BEHAVIOR; DESIGN;
D O I
10.1007/s00170-024-14343-8
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Advancements in additive manufacturing have significantly increased the use of cellular structures in product development, especially in the automotive, aerospace, and biomedical industries, due to their enhanced strength-to-weight ratio and energy-absorbing capabilities. This study investigates the tensile properties of 3D-printed PLA prismatic cellular structures, focusing on the effects of fillet radius, wall thickness, and cell size on tensile strength, Young's modulus, and strength-to-weight ratio. Using a full factorial design and ANOVA, we examined the impact and interaction of each geometrical parameter. Our findings show that triangular cellular structures exhibit a higher stiffness of 1.36 GPa and tensile strength of 24.28 MPa, resulting in a notable 5.78 MPa/gram strength-to-weight ratio. Increasing cell count and wall thickness enhances both tensile strength and Young's modulus, whereas adding fillet radii at corners reduces these properties. Fracture behaviors are influenced by geometrical design: shorter, thicker walls lead to progressive crack propagation, while longer, thinner walls tend to fail catastrophically. Fillet radius introduction shifts the fracture initiation point from the nodes. ANOVA results indicate that wall thickness and cell size significantly affect tensile strength and Young's modulus, contributing 36.53% and 53.54%, respectively.
引用
收藏
页码:4399 / 4410
页数:12
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