定载荷条件下树脂基材料高温收缩量实时测量

Real Time Measurement of High-temperature Shrinkage of Resin-based Materials under Constant Load

为研究树脂基材料高温收缩量,提出一种测量定载荷条件下复合材料高温收缩量的方法,根据此方法自行设计搭建了复合材料高温收缩过程试验测量装置。以不同树脂基复合材料为研究对象,进行定载荷条件下树脂基复合材料高温收缩过程试验测量,获得碳板热面处及压头冷面处位移变化,得出树脂基复合材料的高温收缩量及冷却后收缩量。研究结果表明:试验装置能够实现定载荷条件下树脂基材料高温收缩量实时测量;无论加热过程或冷却后,试验件最大变形绝对量不超过0.37 mm;加热过程中编织石英酚醛复合材料最大变形率不超过6.43‰,石英杂化酚醛复合材料最大变形率不超过3.76‰;冷却后编织石英酚醛复合材料最大变形率不超过4.57‰,石英杂化酚醛复合材料不超过6.87‰;试验结果验证了该测量方法的正确性及有效性,并为该类材料的高温收缩及匹配分析提供了基础物性数据。

To study the high-temperature shrinkage of resin-based materials,a method for measuring the high-temperature shrinkage of composite materials under constant load is proposed,and a measuring device for the high-temperature shrinkage process of composite materials is designed.The high-temperature shrinkages of resin-based materials under constant load are test measured by taking different resin-based materials as the research objects.The changing curves of displacements at the hot surface of carbon plate and the cold surface of indenter were obtained,and the high-temperature shrinkages of resin-based materials and their shrinkages after cooling were measured.The results show that the measuring device can measure the high-temperature shrinkage of resin-based materials in real-time under constant load.The absolute maximum deformation of the test piece is no more than 0.37 mm during heating or after cooling.During heating,the maximum deformation rate of braided quartz/phenolic composite is no more than 6.43‰,and that of quartz-phenolic hybrid composite is no more than 3.76‰.After cooling,the maximum deformation rate of braided quartz/phenolic composite is no more than 4.57‰,and that of quartz-phenolic hybrid composite is not more than 6.87‰.The test results provide basic physical property data for the high-temperature shrinkage and matching analysis of such materials.