Influence of the Specimen Thickness on the Interlayer Shear Strengths of Additively Manufactured Polymers

IF 2 3区工程技术 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Experimental Mechanics Pub Date : 2025-03-14 DOI:10.1007/s11340-025-01170-5

B. Liu, X. Zheng, L.R. Xu

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引用次数: 0

Abstract

Background

The shear strength of an engineering material is a critical mechanical parameter, however, its measurement often encounters challenges especially for new materials. Moreover, little research was conducted on the size effect of the shear strengths.

Objective

This study is to determine the specimen thickness effect on the interlayer shear strengths of two types of additively manufactured polymers.

Methods

A combined experimental and numerical investigation of the interlayer shear strength measurement was conducted, and its application targeted polylactic acid and polyamide using fused filament fabrication and selective laser sintering, respectively. A necking-shaped shear specimen was proposed to measure the interlayer shear strengths with the aid of both 3D finite element analysis and 3D digital image correlation.

Results

All specimens showed a consistent pure shear fracture pattern, and the shear strengths increased as the specimen thickness increased.

Conclusions

Future interlayer shear strength measurements should specify a fixed specimen thickness for fair comparisons.

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试件厚度对增材聚合物层间抗剪强度的影响

工程材料的抗剪强度是一个重要的力学参数，但其测量经常遇到挑战，特别是对于新材料。此外，对抗剪强度的尺寸效应研究较少。目的研究试样厚度对两种增材聚合物层间抗剪强度的影响。方法采用实验与数值相结合的方法进行了层间抗剪强度测量，并分别针对聚乳酸和聚酰胺进行了熔丝制备和选择性激光烧结。采用三维有限元分析和三维数字图像相关相结合的方法，提出了一种颈状剪切试件，用于测量层间抗剪强度。结果所有试件均表现为一致的纯剪切断裂模式，且抗剪强度随试件厚度的增加而增大。结论：未来的层间抗剪强度测量应指定一个固定的试样厚度，以进行公平的比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Experimental Mechanics 物理-材料科学：表征与测试

CiteScore

4.40

自引率

16.70%

发文量

111

审稿时长

3 months

期刊介绍： Experimental Mechanics is the official journal of the Society for Experimental Mechanics that publishes papers in all areas of experimentation including its theoretical and computational analysis. The journal covers research in design and implementation of novel or improved experiments to characterize materials, structures and systems. Articles extending the frontiers of experimental mechanics at large and small scales are particularly welcome. Coverage extends from research in solid and fluids mechanics to fields at the intersection of disciplines including physics, chemistry and biology. Development of new devices and technologies for metrology applications in a wide range of industrial sectors (e.g., manufacturing, high-performance materials, aerospace, information technology, medicine, energy and environmental technologies) is also covered.