由于炭布种类繁多，其力学性能差别也较大。在炭布用于实际工程之前，应有一套合理的测试方法，用以测定炭布的拉伸强度及弹性模量等有关的力学性能指标。参照日本的有关试验方法，对国内外的多种炭布和粘接剂进行了系列试验研究。试验发现，炭布在破坏之前能保持较好的线弹性变化，可以认为其应力—应变为线性关系；试件的尺寸对拉伸强度影响很大，即存在尺寸效应；粘接剂的使用有利于炭纤维材料强度的充分发挥，粘接剂的种类对试件的拉伸强度有一定影响。
Because there are so many kinds of carbon fiber sheet (CFS) withvarious mechanical behaviors, it is necessary and important to present a reasonable method to determine the tensile strength and modulus of elasticity for CFS. Four kinds of CFS and four kinds of epoxies were used in the test. Results show that the stress of CFS increases linearly with the increase of its strain, and that the mechanical properties of epoxy and the width of specimens will affect the tensile strength of CFS strip. The method of determining the tensile strength and modulus of elasticity for CFS is rather practicable.
参考文献
| [1] | 日本混凝土协会.连续纤维补强混凝土研究委员会报告书[M].东京:报光株氏会社,1997:3-5. |
| [2] | 日本混凝土协会.连续纤维补强混凝土研究委员会报告书[M].东京:报光株氏会社,1998:2-5. |
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