为研究渗透脱水后黑加仑浆果的微波真空膨化特性及其工艺参数确定,文章通过单因素试验,研究微波功率、真空度、初始含水率及处理量对黑加仑浆果膨化特性的影响;通过二次回归正交试验,分析微波强度、真空度、初始含水率、膨化时间与黑加...为研究渗透脱水后黑加仑浆果的微波真空膨化特性及其工艺参数确定,文章通过单因素试验,研究微波功率、真空度、初始含水率及处理量对黑加仑浆果膨化特性的影响;通过二次回归正交试验,分析微波强度、真空度、初始含水率、膨化时间与黑加仑浆果膨化率的关系,优化工艺参数。在微波真空条件下,黑加仑整果的体积膨胀过程有迅速增长和缓慢增加两个阶段,符合Exponent rise to maximum函数规律,每个因素对整果膨胀系数和动力系数的综合作用,决定微波真空膨化黑加仑整果膨化率;各因素对膨化率影响的主次顺序为膨化时间、真空度、微波强度、初始含水率。研究结果可为微波真空膨化浆果的工业化生产提供技术依据。展开更多
The understanding of the rock deformation and failure process and the development of appropriate constitutive models are the basis for solving problems in rock engineering. In order to investigate progressive failure ...The understanding of the rock deformation and failure process and the development of appropriate constitutive models are the basis for solving problems in rock engineering. In order to investigate progressive failure behavior in brittle rocks, a modified constitutive model was developed which follows the principles of the continuum damage mechanics method. It incorporates non-linear Hoek-Brown failure criterion, confining pressure-dependent strength degradation and volume dilation laws, and is able to represent the nonlinear degradation and dilation behaviors of brittle rocks in the post-failure region. A series of triaxial compression tests were carried out on Eibenstock(Germany) granite samples. Based on a lab data fitting procedure, a consistent parameter set for the modified constitutive model was deduced and implemented into the numerical code FLAC3 D. The good agreement between numerical and laboratory results indicates that the modified constitutive law is well suited to represent the nonlinear mechanical behavior of brittle rock especially in the post-failure region.展开更多
文摘为研究渗透脱水后黑加仑浆果的微波真空膨化特性及其工艺参数确定,文章通过单因素试验,研究微波功率、真空度、初始含水率及处理量对黑加仑浆果膨化特性的影响;通过二次回归正交试验,分析微波强度、真空度、初始含水率、膨化时间与黑加仑浆果膨化率的关系,优化工艺参数。在微波真空条件下,黑加仑整果的体积膨胀过程有迅速增长和缓慢增加两个阶段,符合Exponent rise to maximum函数规律,每个因素对整果膨胀系数和动力系数的综合作用,决定微波真空膨化黑加仑整果膨化率;各因素对膨化率影响的主次顺序为膨化时间、真空度、微波强度、初始含水率。研究结果可为微波真空膨化浆果的工业化生产提供技术依据。
基金Project(2015M570678)supported by China Postdoctoral Science Foundation funded project
文摘The understanding of the rock deformation and failure process and the development of appropriate constitutive models are the basis for solving problems in rock engineering. In order to investigate progressive failure behavior in brittle rocks, a modified constitutive model was developed which follows the principles of the continuum damage mechanics method. It incorporates non-linear Hoek-Brown failure criterion, confining pressure-dependent strength degradation and volume dilation laws, and is able to represent the nonlinear degradation and dilation behaviors of brittle rocks in the post-failure region. A series of triaxial compression tests were carried out on Eibenstock(Germany) granite samples. Based on a lab data fitting procedure, a consistent parameter set for the modified constitutive model was deduced and implemented into the numerical code FLAC3 D. The good agreement between numerical and laboratory results indicates that the modified constitutive law is well suited to represent the nonlinear mechanical behavior of brittle rock especially in the post-failure region.
