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按现在的技术、由玻璃层压板制造制品时、在材料内部产生和它的极限强度相接边的应力可能引起显著收缩。在层压板中,由不同底材制造的各层,内部应力达到特别大的值。在某些情况下,各层粘含剂的成分也不同,结果各层产生不同的收缩、导至很大的内部应力。为了研究这个内应力,曾使用了直径为0.03毫米的退火康铜钱作为电阻发送器。每根导线用Бφ—2胶粘在底纸上、为增加测量的稳定性,在发送口制好之后,在150℃下为时20小时进行硬化。下面引证在400×400×300的塑料中剩余应力的研究结果。塑料的一部分层是由石棉布做成,其余都是由玻璃布层。在缩聚和最后冷却时测出了变形。发送器是同连接线一起放在材料内各层之间:石棉和玻璃层的分界面上、玻璃布层
In the current state of the art, when articles are manufactured from glass laminates, significant stress may be induced in the material by creating stresses in the material that come in contact with its ultimate strength. In laminates, layers made from different substrates have an especially large internal stress. In some cases, the composition of the various layers of adhesive is also different, resulting in different layers of contraction, leading to a large internal stress. In order to study this internal stress, annealed copper coins 0.03 mm in diameter were used as the resistance transmitter. Each wire is glued to the backing paper with a φφ-2 adhesive. To increase the stability of the measurement, the wire is hardened at 150 ° C for 20 hours after the delivery is completed. The following is a quotation of the study of the residual stresses in a 400 × 400 × 300 plastic. Part of the plastic layer is made of asbestos cloth, the rest are made of glass cloth layer. Deformation was measured during polycondensation and final cooling. The transmitter is placed with the connecting wire between the layers of the material: the interface between the asbestos and the glass layer, the glass cloth layer