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China Plastics ›› 2020, Vol. 34 ›› Issue (11): 86-93.DOI: 10.19491/j.issn.1001-9278.2020.11.015
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LIU Penghui, YANG Huahao, HU Xiaoyi, ZHE Dongmei()
Received:
2020-05-25
Online:
2020-11-26
Published:
2020-11-20
CLC Number:
LIU Penghui, YANG Huahao, HU Xiaoyi, ZHE Dongmei. Research Progress in Fracture Mechanics Evaluation Methods for Polymer Materials[J]. China Plastics, 2020, 34(11): 86-93.
研究方法 | LEFM | EPFM | EWF |
---|---|---|---|
应用范围 | 满足式(3)、(4)判据的材料 | 满足 | 薄片材料,试样韧带长度需满足式(9) |
应用特点 | 试样需处于平面应变状态,裂纹尖端小范围屈服 | 试样需处于平面应变状态,裂纹尖端结构小变形 | 试样需处于平面应力状态 |
实用效果 | 只能少数脆性材料试样能进行断裂韧性评价,不适用于韧性材料;材料参数KIC和GIC较易通过试验测得,参数物理意义明确。 | 除脆性材料外也适用于韧性材料,但观察和标记韧性材料试样裂纹前端和扩展情况较为困难;材料参数JIC的试相对参数δIC更易测定。 | 尚未有标准化测试方法,适用于薄片材料增韧效果的评价,可用于高分子增韧材料的开发与应用。 |
研究方法 | LEFM | EPFM | EWF |
---|---|---|---|
应用范围 | 满足式(3)、(4)判据的材料 | 满足 | 薄片材料,试样韧带长度需满足式(9) |
应用特点 | 试样需处于平面应变状态,裂纹尖端小范围屈服 | 试样需处于平面应变状态,裂纹尖端结构小变形 | 试样需处于平面应力状态 |
实用效果 | 只能少数脆性材料试样能进行断裂韧性评价,不适用于韧性材料;材料参数KIC和GIC较易通过试验测得,参数物理意义明确。 | 除脆性材料外也适用于韧性材料,但观察和标记韧性材料试样裂纹前端和扩展情况较为困难;材料参数JIC的试相对参数δIC更易测定。 | 尚未有标准化测试方法,适用于薄片材料增韧效果的评价,可用于高分子增韧材料的开发与应用。 |
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