...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>High-Performance Composites >The Modified D 695 Compression Test Method
【24h】

The Modified D 695 Compression Test Method

机译：改进的D 695压缩测试方法

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

Until the early 1970s, there was relatively little interest in measuring the compressive properties of composite materials. For design purposes, it was generally assumed that the compressive strength and modulus were similar to the tensile values. However, just as for aluminum some 30 years earlier, thin composite sheets were beginning to be used in aircraft structures, and more accurate knowledge of the compressive properties was needed. Determining the compressive strength of a thin material specimen has been a long-standing challenge because the specimen tends to buckle prior to compressive failure. The use of thin aluminum sheet in aircraft construction during World War II motivated the development of suitable test methods. Government reports and journal articles from the 1940s contained very detailed presentations of various methods of laterally supporting a thin specimen without unduly influencing the axial compressive strength measurement. Candidates included lateral support of the specimen over its length with small-diameter rollers at both surfaces and using flexible metal ringers as well as the use of grooved plates and even lubricated flat pktes. And rather than using just a single thin specimen, often a "pack" of specimens were stacked for testing. Sometimes, these stacked specimens were even lightly bonded for greater resistance to buckling. Eventually these techniques were included in the long-standing "Compression Testing of Metallic Materials," ASTM E 9, first published in 1924 by ASTM International (W. Consho-hocken, Pa.).
机译：直到1970年代初，人们对测量复合材料的压缩性能的兴趣相对较少。为了设计目的，通常假设抗压强度和模量与拉伸值相似。但是，就像大约30年前的铝一样，复合材料薄板已开始用于飞机结构中，因此需要更准确的压缩性能知识。确定薄材料样品的抗压强度一直是一个长期的挑战，因为样品在压缩破坏之前容易弯曲。第二次世界大战期间飞机制造中使用薄铝板促使开发合适的测试方法。 1940年代的政府报告和期刊文章非常详细地介绍了在不过度影响轴向抗压强度测量的情况下侧向支撑薄样本的各种方法。候选人包括在试样的整个长度上用两个小直径的滚子在侧面进行横向支撑，并使用挠性金属齿圈，以及使用开槽的板甚至润滑的扁平小齿轮。而不是仅使用一个薄的样本，而是经常将一堆“样本”堆叠起来进行测试。有时，这些堆叠的样本甚至被轻度粘合以增强抗屈曲性。最终，这些技术包括在由ASTM International（W. Consho-hocken，PA。）于1924年首次发布的历史悠久的“金属材料压缩测试” ASTM E 9中。

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