• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Spacecraft and Rockets >Large Strain Four-Point Bending of Thin Unidirectional Composites
【24h】

Large Strain Four-Point Bending of Thin Unidirectional Composites

机译：薄单向复合材料的大应变四点弯曲

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

A large deformation four-point bending fixture was used to test thin unidirectional composite laminas primarily used in strain energy deployable space structures. The tests allowed investigation of the large strain elastic constitutive behavior of two aerospace-grade intermediate modulus carbon fibers, a high modulus carbon fiber, and a structural glass fiber. Thermoset plastic coupons reinforced with these fibers and ranging in thickness from 0.1 to 0.5mm were tested. A nonlinear empirical constitutive model was used to represent fiber axial tensile and compressive behavior and through a structural model, predict coupon flexural response and estimate constitutive model parameters. Intermediate modulus carbon fibers were found to be significantly nonlinear with modulus linearly increasing with strain. At failure, the fiber tangent modulus in tension was 2 to 3.1 times higher than in compression. The modulus of glass fibers was essentially constant. High modulus carbon fibers exhibited a more complex response with flexural stiffness initially slightly increasing followed by a moderate reduction in stiffness and finally, a sharp reduction in stiffness and failure.
机译：使用大变形四点弯曲夹具测试主要用于应变能可展开空间结构的薄单向复合薄板。该测试允许研究两种航空航天级中模量碳纤维，高模量碳纤维和结构玻璃纤维的大应变弹性本构行为。测试了用这些纤维增强的热固性塑料试样，厚度在0.1到0.5mm之间。使用非线性经验本构模型来表示纤维轴向拉伸和压缩行为，并通过结构模型来预测试件弯曲响应并估计本构模型参数。发现中间模量碳纤维是明显非线性的，模量随应变线性增加。破坏时，纤维的切线模量在拉伸时比压缩时高2至3.1倍。玻璃纤维的模量基本上是恒定的。高模量碳纤维表现出更复杂的响应，弯曲刚度最初略有增加，随后刚度适度下降，最后刚度和破坏急剧下降。

著录项

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