CAJ | 학술논문

使用5种冲击头对2024-T3铝合金板进行多次冲击试验，然后通过对冲击后的铝合金板进行轴向压缩试验研究凹坑对铝合金板剩余强度的影响。研究结果表明，随着凹坑深度的增加，5种类型的凹坑以不同的变化规律影响铝合金板的极限强度。然而，相对于冲击过程中产生的平板的整体弯曲变形对极限强度的影响，凹坑本身的影响并不显著。通过对试验数据进行分析，得到冲击能量系数和凹坑深度系数以及极限强度衰减率和凹坑深度系数的方程。
사용5충충격두대2024-T3려합금판진행다차충격시험，연후통과대충격후적려합금판진행축향압축시험연구요갱대려합금판잉여강도적영향。연구결과표명，수착요갱심도적증가，5충류형적요갱이불동적변화규률영향려합금판적겁한강도。연이，상대우충격과정중산생적평판적정체만곡변형대겁한강도적영향，요갱본신적영향병불현저。통과대시험수거진행분석，득도충격능량계수화요갱심도계수이급겁한강도쇠감솔화요갱심도계수적방정。
Drop-weight impact tests were conducted on 2024-T3 aluminum plates with five types of impactors, and then the effects of the dent on the residual ultimate strength of the 2024-T3 specimens were investigated through axial compression tests. Results indicate that with increase in dent depth, the five types of dents affect the ultimate strength of the plate in different trends. Nevertheless, other than the plate global deflection caused by impacting, the dent itself has unremarkable effect on the ultimate strength. The mathematical expressions are derived regarding the relationship between impact energy factor and the dent depth factor as well as the compressive ultimate strength reduction rate and the dent depth factor.