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docs/_posts/2024-09-18-tensile-instability.md

@@ -12,7 +12,7 @@ This blog is from some parts from the [Journal of Computational Physics](https:/
 
 More than two decades ago, it was found the numerical simulations of typical elastic dynamics problems using updated Lagrangian smoothed particle hydrodynamics (ULSPH) may lead to numerical instability.
 
-![Tensor-instability](/SPHinXsys/assets/img/tensor-instability.jpg)
+![Tensor-instability](/SPHinXsys/assets/img/tensor-instability.jpg){height="350" style="display: block; margin: 0 auto" }
 <center>Fig. 1. Illustration for (a) no numerical instabilities, (b) non-physical fractures and (c) zigzag pattern in ULSPH simulations of 2D oscillating plates. The particles are colored with von Mises stress.</center>
 
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