• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议> >DETERMINATION OF CFRP MECHANICAL PROPERTIES INAERONAUTICAL STRUCTURES FOR USE IN IMPACT NUMERICALSIMULATIONS
【24h】

DETERMINATION OF CFRP MECHANICAL PROPERTIES INAERONAUTICAL STRUCTURES FOR USE IN IMPACT NUMERICALSIMULATIONS

机译：确定用于冲击数值模拟的CFRP力学性能的非自然结构

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

Composite materials, which are commonly used in aeronautic applications, are becomingrnprogressively more used in railway and automotive industries. Therefore, composites technologyrnknow-how is being transferred to such sectors. FEM models of composite materials, that arernbecoming more accurate, allow taking decisions in earlier steps of development, in many differentrndesign assessments such as structural stiffness, fatigue analysis or impact scenarios like bird strikes.rnTherefore, FEM models are essential to improve quality before testing prototype in advanced designrnphases.rnModern FEM codes include complete material models using homogeneous continuum mechanics forrnnumerical simulation of continuous fiber reinforced composite materials. The damage parametersrnincluded in these models describe matrix microcracking, which appears under a transverse tensilernloading, fiber-matrix debonding due to a shear loading and fiber rupture due to axial loads. Differentrntest procedures are proposed to obtain the material constants. However, many of this group of testsrnare not standardised by any industrial standards body.rnOn the other hand, it is not always possible to obtain existing mechanical data to define compositernmaterial constants. In order to determinate the material parameters that define the numerical model,rnexperimental investigation has been carried out with the coupon tests proposed. Different tensile testsrnhave been performed under quasi-static and different high-speed conditions using a high rate testrnmachine, according to standards where possible. Different orientations between specimen’s fiberrndirection and tensile load have been tested. Tests have been carried out with a UD carbon/epoxyrncomposite. Results have allowed obtaining the basic elastic constants, the matrix and fiber tensilerndamage parameters, the plastic constants and finally the strain rate sensitivity constants.
机译：通常在航空应用中使用的复合材料正越来越多地用于铁路和汽车行业。因此，复合材料技术诀窍正在转移到此类领域。复合材料的FEM模型变得更加准确，可以在许多不同的设计评估中（例如结构刚度，疲劳分析或鸟击等撞击场景）在开发的早期步骤中做出决定。因此，FEM模型对于在测试原型之前提高质量至关重要现代FEM代码包括使用均一连续介质力学的完整材料模型，用于连续纤维增强复合材料的数值模拟。这些模型中包含的损伤参数描述了基体微裂纹，该裂纹出现在横向拉伸载荷，由于剪切载荷引起的纤维基体剥离以及由于轴向载荷引起的纤维断裂的情况下。提出了不同的测试程序以获得材料常数。但是，许多这类测试都没有通过任何行业标准机构进行标准化。另一方面，并​​非总是能够获得现有的力学数据来定义复合材料常数。为了确定定义数值模型的材料参数，提出了试件试验进行了实验研究。根据可能的标准，已经使用高速测试机在准静态和不同的高速条件下执行了不同的拉伸测试。测试了样品纤维方向和拉伸载荷之间的不同方向。用UD碳/环氧复合材料进行了测试。结果允许获得基本的弹性常数，基体和纤维的拉伸损伤参数，塑性常数以及最终的应变速率敏感性常数。

著录项

  • 来源
    《》|2006年|1-10|共10页
  • 会议地点 San Sebastian(ES);San Sebastian(ES)
  • 作者

    Lluís Candini González; Jon A. Aguirre Padillo;

  • 作者单位

    SENER Ingeniería y Sistemas, Sección MecánicarnProven?a 392, 08025 Barcelona, Spain lluis.candini@sener.es;

    SENER Ingeniería y Sistemas, Sección MecánicarnProven?a 392, 08025 Barcelona, Spain jon.aguirre@sener.es;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 交通运输经济;
  • 关键词

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