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首页> 外文期刊>Journal of Composites Technology & Research >STRAIN GAGE SELECTION CRITERIA FOR TEXTILE COMPOSITE MATERIALS
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STRAIN GAGE SELECTION CRITERIA FOR TEXTILE COMPOSITE MATERIALS

机译：纺织复合材料的应变片选择标准

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Composite materials reinforced with braided, woven, knit, and stitched fibrous preforms are emerging as potential alternatives to unidirectional prepreg tape. A variety of these material forms are currently being evaluated by major airframe manufacturers. These new forms of composite materials bring with them potential testing problems. The applicability of existing test methods to the 2-D and 3-D braided, woven, stitched, and knit materials being evaluated bears investigation. The overriding concern is that the values measured are accurate representations of the true material response, This paper will provide a review of efforts to establish a set of strain gage selection guidelines for textile reinforced composite materials. A variety of strain gags were evaluated in the study to determine the sensitivity of strain measurements to the size of the strain gage, The strain gages were chosen to provide a range of gage lengths and widths. The gage aspect ratio (the length-to-width ratio) was also varied. The gages were tested on a diverse collection of textile composite laminates. Test specimens featured eleven different textile architectures: four 2-D triaxial braids, six 3-D weaves, and one stitched uniweave architecture. All specimens were loaded in uniaxial tension. The materials' moduli were measured in both the longitudinal (parallel to the 0 degrees yarns) and the transverse (perpendicular to the 0 degrees yarns directions. The results of these measurements were analyzed to establish the strain gage guidelines. [References: 3]
机译：用编织的，编织的，编织的和缝合的纤维预成型件增强的复合材料正在成为单向预浸料带的潜在替代品。大型机身制造商目前正在评估各种材料形式。这些新形式的复合材料带来了潜在的测试问题。现有测试方法对正在评估的2D和3D编织，机织，缝合和针织材料的适用性值得调查。首要的问题是所测得的值是真实材料响应的准确表示。本文将回顾为建立一套用于纺织增强复合材料的应变计选择指南所做的努力。在研究中评估了各种应变计，以确定应变测量值对应变计尺寸的敏感性。选择应变计以提供一定范围的应变计长度和宽度。标距长宽比（长宽比）也有所变化。量具在各种纺织复合材料层压板上进行了测试。测试样品具有11种不同的纺织品结构：4种2D三轴编织物，6种3D编织和1种缝合的单编织结构。所有样品均以单轴张力加载。在纵向（平行于0度纱线）和横向（垂直于0度纱线方向）上测量材料的模量，分析这些测量结果以建立应变计指南[参考文献：3]

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