CAJ | 학술논문

为确定新研制的酚醛/玻纤复合材料的抗拉强度是否满足设计及使用要求，研究了酚醛/玻纤复合材料在-55℃、20℃干态/湿态、71℃干态/湿态和93℃干态/湿态的经向拉伸性能，讨论了不同温度以及湿态处理对酚醛/玻纤复合材料拉伸强度的影响规律，利用扫描电子显微镜（SEM ）考察了试件断口的显微结构和断裂形态．研究结果表明：随着温度的升高，酚醛/玻纤层合板的抗拉强度总体呈现下降的趋势．干态条件下，20℃状态的抗拉强度比-55℃状态下的降低了129．9 M Pa ，即降低了24．26％；71℃状态下的抗拉强度比20℃状态下降低了50 M Pa ，即降低了12．33％；93℃状态下的抗拉强度比71℃状态下降低了62 M Pa ，即降低了20．33％．湿态条件下，71℃状态下的抗拉强度比20℃状态下降低了72．3 M Pa ，即降低了29．19％；93℃状态下的抗拉强度比71℃状态下降低了72 M Pa ，即降低了26．57％．在同一温度下，湿态状态下试样的抗拉强度比干态状态下的明显降低．20℃状态下，湿态比干态降低了69．67 M Pa ，即降低了17．18％；71℃状态下，湿态比干态降低了117．7 M Pa ，即降低了33．11％；93℃状态下，湿态比干态降低了111．6 M Pa ，即降低了39．41％．
위학정신연제적분철/파섬복합재료적항랍강도시부만족설계급사용요구，연구료분철/파섬복합재료재-55℃、20℃간태/습태、71℃간태/습태화93℃간태/습태적경향랍신성능，토론료불동온도이급습태처리대분철/파섬복합재료랍신강도적영향규률，이용소묘전자현미경（SEM ）고찰료시건단구적현미결구화단렬형태．연구결과표명：수착온도적승고，분철/파섬층합판적항랍강도총체정현하강적추세．간태조건하，20℃상태적항랍강도비-55℃상태하적강저료129．9 M Pa ，즉강저료24．26％；71℃상태하적항랍강도비20℃상태하강저료50 M Pa ，즉강저료12．33％；93℃상태하적항랍강도비71℃상태하강저료62 M Pa ，즉강저료20．33％．습태조건하，71℃상태하적항랍강도비20℃상태하강저료72．3 M Pa ，즉강저료29．19％；93℃상태하적항랍강도비71℃상태하강저료72 M Pa ，즉강저료26．57％．재동일온도하，습태상태하시양적항랍강도비간태상태하적명현강저．20℃상태하，습태비간태강저료69．67 M Pa ，즉강저료17．18％；71℃상태하，습태비간태강저료117．7 M Pa ，즉강저료33．11％；93℃상태하，습태비간태강저료111．6 M Pa ，즉강저료39．41％．
In order to find whether the tensile strength of the new phenolic/glass fiber composite meets the requirement ,the tensile properties of phenolic/glass fiber composite at 55 ℃ ,20 ℃(wet/dry) and 93℃ (wet/dry ) have been studied .The effects of different temperature and wet-treatment on tensile properties have been discussed .Microstructures and fracture morphology were studied by means of SEM .T he results show :T he tensile properties of phenolic/glass fiber composite are generally decreased with the rising of temperature .In dry condition ,the tensile strength at 20 ℃ decreases 129 .9 M Pa compared with that at -55 ℃ ,which is reduced by 24 .26% .The tensile strength at 71 ℃decreases 50MPa compared with that at 20 ℃ ,which is reduced by 12 .33% .The tensile strength at 93 ℃ decreases 62 MPa compared with that at 71 ℃ ,which is reduced by 20 .33% .In wet condition ,the tensile strength at 71 ℃ reduces 72 .3 MPa compared with that at 20 ℃ ,that is ,it reduces 29 .19% .The tensile strength at 93 ℃ reduces 72 MPa compared with that at 71 ℃ ,that is ,it reduces 26 .57% .In the same temperature ,the tensile strength in wet condition decreases clearly than it in dry condition .In 20 ℃ ,the tensile strength at wet condition reduces 69 .67 MPa compared with that at dry condition ,which is reduced by 17 .18% .In 71 ℃ ,the tensile strength at wet condition reduces 117 .7 MPa compared with that at dry condition ,which is reduced by 33 .11% .In 93 ℃ ,the tensile strength at wet condition reduces 111 .6 M Pa compared with that at dry condition ,w hich is reduced by 39 .41% .