Abstract

The processes that occur during loading and destruction of composite materials (CMs) are studied by the full pull-out method. The mechanisms of load and deformation transfer in CM and the effects of the plasma activation of fibers and of the matrix properties on them are ascertained. It is established that the transfer and distribution of load and deformation among fibers in CM occur via two adhesive joints of fibers with the matrix layer. Reinforcing fibers activated by nonequilibrium low-temperature plasma increase the specific absorbed-in-fracture energy from 26 to 44 J/cm², the shear strength from 7.1 to 10.4 MPa, and the strain from 1.8 to 2.33%. When the maximum load and strain are reached, the CM is destroyed and the fiber is fired from the matrix. In the case of nonactivated fiber reinforcement, destruction of the CM occurs in two stages: first, the strength and deformation reach the limiting values and the fiber then begins to shift in the matrix, which causes stress relaxation and a sharp drop in strength of the CM. Further deformation occurs as a result of pulling fibers out of the matrix at low load. Plasma activation of reinforcing fibers leads to an increase in properties of the CM.

中文翻译：

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复合材料中纤维间的载荷和变形转移机理

摘要

通过完全拉出方法研究了复合材料（CM）的装载和破坏过程中发生的过程。确定了CM中的载荷和变形传递的机理，以及纤维的等离子体活化和基质特性对其的影响。可以确定的是，CM中纤维之间的载荷和变形的传递和分布是通过纤维与基体层的两个粘合连接而发生的。由非平衡低温等离子体激活的增强纤维将比吸收比能从26 J / cm ²增加到44 J / cm ²，剪切强度从7.1到10.4 MPa，应变从1.8到2.33％。当达到最大载荷和最大应变时，CM被破坏，纤维从基体中被烧掉。对于未活化的纤维增强，CM的破坏分为两个阶段：首先，强度和变形达到极限值，然后纤维开始在基体中移动，这会导致应力松弛和强度急剧下降。厘米。由于在低负荷下将纤维从基质中拉出而导致进一步变形。增强纤维的等离子体活化导致CM性能的提高。