Research on Mechanical Testing Method for In-plane Shear Properties of Advanced Composite Materials

先进复合材料面内剪切性能力学测试方法研究

• 批准号: 62550050
• 负责人: UEMURA Masuji
• 金额: $ 1.22万
• 依托单位: Nihon University, College of Industrial Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62550050/
• 关键词: Advanced composite materials; CFRP; Mechanical testing method; In-plane; Picture-frame fixture; Rail-shear method; 一方向強化材; 面内せん断; 複合材料; パンダグラフ法; クロス強化材

The mechanical in-plane shear testing method for advanced composite panels has yet been authorized internationally because of its difficulty to present the uniform s stress field and the reliable shear properties.In the present paper, the several revisions of the traditional picture-frame loading fix is proposed to use for the in-plane shear testing method. The experiments on unidirecti and cloth-reinforced CFRP specimens and the numerical analyses by use of FEM were perfo in order to verify the advantages of these various revisions. As a result, the uniform shear stress state and hence the reliable higher shear strengths were obtained, because t is no large stress concentrations along edges and at corners, compared with other tes methods which used the traditional simple picture-frame fixture, two-rail or three-rail fixtures and JIS methos. That is, in these shear tests which are used most widely at pres the lower shear strengths were obtained because of the premature failure due to st concentration and nonuniform stress distribution. Further, it seemed that JIS method for did not give a shear fracture under combined stress conditions in unidirectional composite

先进复合材料壁板的面内剪切试验方法由于难以给出均匀的应力场和可靠的剪切性能而在国际上尚未得到认可，本文对传统的画框加载法进行了几点修正，使其适用于面内剪切试验方法。为了验证各种修正方法的优越性，进行了单向和布筋CFRP试件的试验和有限元数值分析。结果表明，与传统的简单画框夹具、二轨或三轨夹具以及JIS方法相比，由于沿沿着和角部没有大的应力集中，因此获得了均匀的剪应力状态，从而获得了可靠的较高的抗剪强度。也就是说，在这些最广泛使用的抗剪试验中，由于应力集中和应力分布不均匀而导致过早破坏，因此获得了较低的抗剪强度。此外，在单向复合材料的复合应力条件下，JIS方法似乎没有给出剪切断裂

项目成果

岩井宏: 強化プラスチック(強化プラスチック協会). 35. (1989)

Hiroshi Iwai：强化塑料（强化塑料协会）35。（1989）。

IWAI,Hiroshi; UEMURA, Masuji; OHKUBO, Hiroshi: "Research on In-plane Shear Testing Methods of Advanced Composite Panels" Journal of the Japan Society for Composite Materials. 15. (1989)

岩井浩；

Masuji UEMURA: Proc.International Conference on Composite Materials VII、Beijing. (1989)

植村正二：第七届国际复合材料会议，北京（1989）。

Masuji UEMURA: Proc.Interhational Conference on Composite Materials VII ,Beijing. (1989)

Masuji UEMURA：Proc.国际复合材料会议 VII，北京。

IWAI,Hiroshi; UEMURA, Masuji; OHKUBO, Hiroshi: "Research on In-plane Shear Testing Methods of Composite Panels" Reinforced Plastics. 35. (1989)

岩井浩；