CAJ | 학술논문

对双线性应变强化材料的动态柱形空穴膨胀模型及其在侵彻问题中的应用进行了研究.通过采用相似变换求解塑性区控制方程,获得了动态柱形空穴膨胀中的弹塑性界面速度、径向应力分布、空穴表面应力的解.基于柱形空穴模型,推导了侵彻方程,并将其得到的预测结果与侵彻实验数据进行了比较.结果表明,模型的理论解与现有数据吻合得很好. 结果还显示了材料的可压缩性和塑性强化模量对柱形空穴膨胀以及侵彻阻力的影响.
대쌍선성응변강화재료적동태주형공혈팽창모형급기재침철문제중적응용진행료연구.통과채용상사변환구해소성구공제방정,획득료동태주형공혈팽창중적탄소성계면속도、경향응력분포、공혈표면응력적해.기우주형공혈모형,추도료침철방정,병장기득도적예측결과여침철실험수거진행료비교.결과표명,모형적이론해여현유수거문합득흔호. 결과환현시료재료적가압축성화소성강화모량대주형공혈팽창이급침철조력적영향.
Dynamic cylindrical cavity expansion model and its application to penetration problems were studied.Both incompressible and compressible bilinear strain-hardening material models were considered.First,solutions for dynamic cylindrical cavity expansion (DCCE) are obtained in terms of the velocity of plastic wave front,radial stress distribution and stress on the cavity surface.The influence of material properties such as compressibility,elastic-plastic constitutive equations and plastic modulus is discussed.Based on the DCCE models,penetration equations are then constructed.Comparison with experimental penetration data shows reasonable agreement between theory and experiment.It also shows that material properties such as plastic modulus have considerable effects on the dynamics cavity expansion and its resistance to penetration.