• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite Structures >A novel evaluation of fracture toughness for random fibrous material
【24h】

A novel evaluation of fracture toughness for random fibrous material

机译：用于随机纤维材料的裂缝韧性的新型评价

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, we perform three-point-bending tests for 3-dimensional random fibrous (3D RF) material specimens of two porosities (87% and 83%) with a crack. The crack with two different crack-length-to-specimen-width ratios (0.2 and 0.5) is considered. Using the tensile strength obtained from experiments and a characteristic average fiber spacing parameter from an equivalent orthotropic fiber network model, a simple theoretical model is developed to evaluate the fracture toughness of 3D RF material. This model gives the fracture toughness of 3D RF material, which is in good agreement with that from compact tension test, and better than the results calculated via the American Society for Testing Materials (ASTM) standard for three-point-bending test. This fact not only rationalizes the use of average fiber spacing size in the developed model, but also demonstrates the model efficiency in evaluating the fracture toughness of 3D RF material. Further, considering the temperature effect on the fracture strength of material, this theoretical model can be successfully used to predict fracture toughness of 3D RF materials at elevated temperatures (299 K similar to 1073 K).
机译：在这项研究中，我们为三维随机纤维（3D RF）材料标本进行三分弯曲试验，其两个孔隙率（87％和83％）具有裂缝。考虑具有两种不同裂缝长度宽度比（0.2和0.5）的裂缝。使用从实验中获得的拉伸强度和来自等同的正交纤维网络模型的特征平均光纤间隔参数，开发了一种简单的理论模型来评估3D RF材料的断裂韧性。该模型提供3D RF材料的断裂韧性，与紧凑张力测试相一致，比通过美国测试材料（ASTM）标准计算的三分弯曲试验所计算的结果更好。这一事实不仅在开发模型中合理化了平均光纤间距尺寸的使用，而且还证明了评估3D RF材料的断裂韧性的模型效率。此外，考虑到对材料的裂缝强度的温度效应，该理论模型可以成功地用于预测升高温度下的3D RF材料的断裂韧性（299 K类似于1073 k）。

著录项

  • 来源
    《Composite Structures》 |2020年第7期|112179.1-112179.8|共8页
  • 作者

    Li Datao; Li Yan; Yu Wenshan; Wang Binhua; Lu Pengmin; Shen Shengping;

  • 作者单位

    Changan Univ MOE Key Lab Rd Construct Technol & Equipment Xian 710064 Peoples R China|Xi An Jiao Tong Univ Sch Aerosp State Key Lab Strength & Vibrat Mech Struct Shaanxi Engn Lab Vibrat Control Aerosp Struct Xian 710049 Peoples R China;

    39th Res Inst CETC Xian 710065 Peoples R China;

    Xi An Jiao Tong Univ Sch Aerosp State Key Lab Strength & Vibrat Mech Struct Shaanxi Engn Lab Vibrat Control Aerosp Struct Xian 710049 Peoples R China;

    Changan Univ MOE Key Lab Rd Construct Technol & Equipment Xian 710064 Peoples R China;

    Changan Univ MOE Key Lab Rd Construct Technol & Equipment Xian 710064 Peoples R China;

    Xi An Jiao Tong Univ Sch Aerosp State Key Lab Strength & Vibrat Mech Struct Shaanxi Engn Lab Vibrat Control Aerosp Struct Xian 710049 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    3D RF (3-dimensional random fibrous) material; Three-point-bending specimen; Fracture toughness; Fiber spacing size; Fracture toughness predicting model;

    机译：3D RF（三维随机纤维）材料;三点弯曲试样;断裂韧性;纤维间距尺寸;断裂韧性预测模型;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号