Numerical setup for direct tension test. (IMAGE) Higher Education Press Caption (a) Load and constraint; (b) coarse aggregate distribution; (c) parallel fiber distribution in tension direction; (d) random fiber distribution. Credit Lei Shen et al. Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.