The initial results of THz spectroscopy non-destructive investigations of epoxy-glass composite structure

The paper presents the initial results of the epoxy-glass composite samples analyses carried out with the use of terahertz spectroscopy. Firstly, the standard specimens made of epoxy resin and glass fibers were researched. The first sample consisted of one layer of glass fiber, the second one had two such layers. To compare the results the results of the composite material sample shut with the 7.62 mm caliber bullet THz analyses were shown. The terahertz spectroscopy uses the well known spectroscopy research methodology however with the use of the new radiation scope. Terahertz bandwidth is mostly defined as (0.1 ÷ 10) THz. Terahertz waves penetrate many materials apart from metals or polar mediums (like water). Therefore, terahertz radiation allows to research many materials such as composite.