刘华博, 孟凡净, 花少震,等.三维打印半透明材料本构关系及应用探讨[J].河南理工大学学报（自然科学版）,2021,40(6):176-181.

LIU H B, MENG F J, HUA S Z, et al.Discussion on the constitutive relation and application of three-dimensional printing semitransparent material[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(6):176-181.

三维打印半透明材料本构关系及应用探讨

刘华博1, 孟凡净1, 花少震1, 王浩2

1.河南工学院 机械工程学院，河南 新乡 453003;2.河南理工大学 能源科学与工程学院，河南 焦作 454000

摘要:为了研究三维打印半透明树脂材料不同后处理方式下本构关系及其应用，采用激光光固化打印技术制备一批半透明树脂标准圆柱试件，研究二次固化时间、轴向加载速率、低温冷冻等后处理方式对半透明光敏树脂材料力学性质的影响，并进行含内置币形裂纹试件单轴压缩试验。试验发现：增加二次固化、低温冷冻等手段可显著增强三维打印半透明树脂材料的脆性，试件弹性模量明显增大；加载速率对试件弹性模量影响较小，但会使试件屈服强度明显增大；在对含内置币形裂纹试件的单轴压缩试验中，观察到有翼形裂纹产生。研究结果表明：与传统浇筑透明树脂相比，三维打印半透明光敏树脂试件制备简单，且可以制备复杂内部结构的试件，但在透明度、低温脆性等物理和力学性质方面仍有欠缺。

关键词:三维打印;半透明树脂;脆性;本构关系;内置裂纹

doi:10.16186/j.cnki.1673-9787.2020040003

基金项目:国家自然科学基金资助项目（51904091）；河南省高等学校青年骨干教师培养计划项目（2019GGJS265）；河南省高等学校 重点科研项目（21A130001）

收稿日期:2020/04/01

修回日期:2020/06/04

出版日期:2021/11/15

Discussion on the constitutive relation and application of three-dimensional printing semitransparent material

LIU Huabo1, MENG Fanjing1, HUA Shaozhen1, WANG Hao2

1.School of Mechanical Engineering， Henan Institute of Technology， Xinxiang  453003 ， Henan， China;2.School of Energy Science and Engineering， Henan Polytechnic University， Jiaozuo  454000 ， Henan， China

Abstract:In order to study the constitutive relationship of three-dimensional printing translucent resin material with different post-processing methods and its application ， a batch of standard cylinder specimens were pre-pared by laser curing 3D printing technology. The effects of post-treatment methods such as secondary curing time ， axial loading rate and low temperature freezing on the mechanical properties of translucent resin were studied ， in addition ， the uniaxial compression test of the specimen with a internal penny-shaped crack was carried out. It was found that the brittleness of the the 3D printing translucent resin and the elastic modulus of the specimen could be significantly increased by increasing the second curing time and low temperature freezing； The loading rate had little effect on the elastic modulus of the specimen ， but it could increase the yield strength of the specimen. In the uniaxial compression test of the specimen with internal penny-shaped crack ， the wing crack was observed. The results showed that ， compared with the traditional casting transparent resin ， the 3D printing translucent resin specimens were simple to prepare， and it could prepare the specimens with complex internal structure， but it still lacked in the physical and mechanical properties such as transparency， low temperature brittleness， etc.

Key words:3D printing;semitransparent resin;brittleness;constitutive relation;internal crack

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