Composites' structures are subjected to various environmental conditions during their service life. However, only a few papers are focalized on analysing damage history after impact at shallow temperatures and among them, even less concern sandwich components. Futhermore, since the effect of any degradation phenomena may not be visible to the naked eye, the evolution of the damage is followed with non-destructive techniquest. In this paper, the damage suffered by sandwich structure composites was evaluated by three NDT techniques: Ultrasound, Lock-in Thermography and speckle interferometry. Sandwich structures investigated consist of carbon fibre reinforced face sheets surrounding a PVC core. Indentation and penetration tests (U = 7.5J, 10.5 J and 12 J) were carried out at room temperature and −55°C, +70°C. After tests, damage extension and propagation has been evaluated in terms of indentation depth and delamination by NDT. The results provided useful information about the influence of extreme temperature on both impact properties and damage evolution in the system investigated.

复合材料的结构在其使用寿命期间会受到各种环境条件的影响。然而，只有少数论文专注于分析浅温冲击后的损伤历史，其中，夹心组件的研究更少。此外，由于肉眼可能无法看到任何退化现象的影响，因此使用非破坏性技术跟踪损坏的演变。在本文中，夹心结构复合材料遭受的损坏通过三种无损检测技术进行评估：超声波、锁定热成像和散斑干涉测量。所研究的夹层结构由围绕 PVC 芯的碳纤维增强面板组成。压痕和渗透测试（U = 7.5J、10.5 J 和 12 J）在室温和 -55°C、+70°C 下进行。经过测试，NDT 已根据压痕深度和分层对损伤扩展和扩展进行了评估。结果提供了有关极端温度对所研究系统的冲击特性和损伤演变影响的有用信息。